Enova Power Corp. Enova Power Corp. 2026 2026-07-15T12:35:09 2026-05-18T00:00:00 2:50 PM No A downstream feeder fault occurred on the distribution system supplied from Kitchener 3 Transformer Station (3TS). During the fault, the transformer Restricted Earth Fault (REF) protection operated unexpectedly due to an incorrect Current Transformer (CT) polarity connection on the transformer neutral circuit. The protection misoperation resulted in the transformer being removed from service, interrupting supply to approximately 10,244 customers. As the other side of the Dual Ended Spot Network station was out of service for planned upgrades, the misoperation caused a total station outage versus removing only one transformer from service with no impact on customers. As a result of the transformer outage, station service was also lost. While operating on battery supply, the Remote Terminal Unit (RTU) experienced a premature battery failure, requiring manual intervention to restore station service and extending the overall restoration time. The post-event investigation identified the incorrect CT polarity connection as the root cause of the protection misoperation. The CT polarity connection has since been corrected, the protection scheme has been retested and verified, and Enova is reviewing its commissioning and protection verification procedures to further strengthen protection verification practices. Others Yes, used IEEE Standard 1366 Yes 12937 7.80000019073486 4 No No Process improvements No Enova’s staff are trained to respond to emergencies and major events. Enova has implemented grid modernization technologies and will continue to do so to increase system reliability and operational response through Survalent’s Fault Location, Isolation, a

Enova’s outage management portal

No 12937 0 0 0 12937 0 0 100 0 0 0.140000000596046 7.80000016093254E-02 13 2 Enova Power Corp. Enova Power Corp. 2026 2026-08-28T13:11:09 2026-07-01T00:00:00 4:36 PM No A line of brief but intense thunderstorms tracked through Southwestern Ontario on the afternoon of Wednesday July 1, 2026. The thunderstorms brought high winds reaching up to 110 km/h across Enova Power Corp.’s service territory. These weather conditions resulted in multiple outages due to tree contacts with overhead conductors and wind-related damage to distribution infrastructure. Adverse Weather-Wind Yes, used IEEE Standard 1366 No 6579 3.90000009536743 8 No No Others No Enova’s staff are trained to be on alert for emergencies and major events. Enova has implemented grid modernization technologies and will continue to do so to increase system reliability and operational efficiencies through Survalent’s Fault Location, Iso

Enova’s outage management portal and corporate website.

No 6500 3 0 0 6576 0 73 55 73 100 0.150000005960464 3.99999991059303E-02 2 40 Entegrus Powerlines Inc. Entegrus Powerlines Inc. 2026 2026-09-01T11:09:48 2026-07-03T00:00:00 7:05 PM Yes Weather alerts indicated the potential for severe thunderstorms, with strong winds and hail possible. See #3 for details of the alert Entegrus issued to customers. The boundaries of the EPI service territory stretch from Wheatley in the southwest to Parkhill in the northeast. The boundaries are non-contiguous, and the distance across the Entegrus service territory is approximately two hours travel time by vehicle. Accordingly, Entegrus operates two operational centres, one in the Entegrus southwest region (located in Chatham) and another in the Entegrus northeast region (located in St. Thomas). While the event occurred after business hours, Entegrus had on-call staff ready to respond and other staff on standby. Restoration efforts continued after-hours throughout the evening of July 4th. The main contributing causes of the Major Event were “Equipment breakage from adverse weather”, “tree contact from adverse weather” and “other adverse weather”. Entegrus serves approximately 64,000 customers. During the Major Event in Blenheim, Chatham, Ridgetown, Tilbury and Wheatley in the evening hours of July 3,2026, there were 4,509 customers interrupted (unrelated to Loss of Supply), representing approximately 7% of Entegrus customers. See #12 below for additional details regarding Loss of Supply from this event. Others Yes, used IEEE Standard 1366 Yes 4509 7 16 Yes No System upgrades No Yes Yes Entegrus conducted a debriefing after the conclusion of the Major Event. Future planned investments include installation of fault-indicating devices to improve fault location and reduce outage identification times. Entegrus is also implementing Fault Loca

No. 2376 0 0 0 4509 0 0 71 29 0 0.230000004172325 0.100000001490116 10 14 ENWIN Utilities Ltd. ENWIN Utilities Ltd. 2026 2026-09-01T16:00:05 2026-07-03T00:00:00 6:26 PM Yes Environment Canada issued a warning at 4:14pm on July 3, 2026, describing the potential of a severe thunderstorm with high winds, to begin in the early evening. The Environment Canada warning was received outside of the regular business hours of the hydro line crews, and the storm did not reach Windsor until 6:26pm July 3. ENWIN did not call out additional employees to stand by based on this warning. ENWIN maintains an afternoon shift of a single bucket truck, and this crew was on shift on the evening of July 3. This crew was immediately mobilized to assess the damage and address hazards. The scale of outages required a call for additional ENWIN crews. ENWIN management simultaneously scheduled the field crews, system control, and supervisory staff to provide 24-hour storm restoration. Shifts of crews worked 24 hours per day beginning the evening of July 3. A severe thunderstorm storm was experienced in southwestern Ontario during the evening of July 3, 2026. The storm produced extreme winds and significant rainfall. There were many incidents of fallen trees, downed lines, and similar wind driven damage across all of the ENWIN service area. Total customers interrupted figure includes all sustained and momentary outages. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 59393 62.4000015258789 3 No No No further action is required at this time No No Yes The Major Event was caused by a thunderstorm with very high winds. ENWIN has invested in system automation/remote operation that allow for remote reconfiguraton of the distribution feeders in event of upset. These system automation devices are in place to

No 14850 303 0 0 59090 0 0 80 20 0 0.400000005960464 0.260390996932983 13 20 GrandBridge Energy Inc. GrandBridge Energy Inc. 2026 2026-02-25T11:04:46 2025-12-28T00:00:00 4:32 PM Yes On December 28, 2025, Environment Climate Change Canada (ECCC) issued a Weather Briefing forecasting inclement weather, including freezing rain. The briefing called for 30–60 mm of rainfall, heavy at times, with the potential for locally higher amounts. Freezing conditions were possible, along with a risk of isolated thunderstorms. At the time of the briefing, there was considerable uncertainty regarding the precise timing and the extent of rain versus freezing rain. Yes. Two additional Operations crews were put on standby as well as two additional tree trimming crews were on standby. Of the five outages that contributed to the Major Event, the main contributing cause of the Major Event was Adverse Weather – Equipment Breakage (Cause Code 6.2). The weather during the Major Event was heavy rainfall and freezing rain. When the crew arrived on site, they found a lightning arrestor damaged, and the bracket melted due to tracking from ice build-up. The percentage of the total customer base that was interrupted is 12.8%, based on a total customer base of 117,233. Others Yes, used IEEE Standard 1366 No 15048 12.8000001907349 5 No No Others No Yes Yes GBE is proactive in mitigating the risk of emergency by applying the appropriate distribution system designs, equipment specifications, deploying grid modernization technology, planned system maintenance, staff training and utility operating practices. GB

No 7292 0 0 0 15048 0 0 80 20 0 9.9399995803833 0.129999995231628 3 5 GrandBridge Energy Inc. GrandBridge Energy Inc. 2026 2026-08-31T09:29:52 2026-07-01T00:00:00 04:20 PM No No. General weather alerts were observed: Orange Heat Warning — Cambridge/Waterloo Region: In effect early July 1. Environment Canada described a long-duration heat event, with daytime highs generally 31–34°C and potentially 37°C (Source: Environment Canada Weather) Yellow Severe Thunderstorm Watch — Cambridge/Waterloo Region: By the afternoon, Environment Canada warned that a line of strong thunderstorms approaching from Lake Huron would move across the area. Potential hazards were wind gusts up to 100 km/h, quarter-sized hail, and heavy rain possibly exceeding 30 mm (Source: Environment Canada Weather). Although there was a yellow severe thunderstorm watch, GBE does not mobilize additional staff for a Watch. Of the six outages that contributed to the Major Event, the main contributing cause of the Major Event was Adverse Weather – Tree Contact (Cause Code 6.1). The weather during the Major Event consisted of heavy winds and thunderstorms. When the crews arrived at the interruption locations, they found large trees on lines. The percentage of the total customer base that was interrupted is 14.32%, based on a total customer base of 117,705. Others Yes, used IEEE Standard 1366 No 16855 15 8 No No Others No GBE is proactive in mitigating the risk of emergency by applying the appropriate distribution system designs, equipment specifications, deploying grid modernization technology, planned system maintenance, staff training and utility operating practices. GB

No 15177 0 0 0 16855 0 0 83 17 0 25.1100006103516 0.14300000667572 8 6 Grimsby Power Incorporated Grimsby Power Incorporated 2026 2026-08-28T08:53:57 2026-07-01T00:00:00 5:58pm No The Town of Grimsby issued warning on June 29, 2026 “Environment Canada is calling for a prolonged period of heat starting Tuesday, June 30 and is expected to last until this Friday, July 3 or possibly into the weekend. Wednesday, July 1 and Thursday, July 2 are expected to be the warmest days, potentially reaching maximum temperatures of 34 to 37 degrees Celsius.” Grimsby Power makes reasonable efforts to monitor weather forecasts, warnings, and developing conditions. Grimsby Power does not have a 24x7 control room, and it maintains procedures to respond to weather-related outages and system emergencies as they occur. Multiple events contributed to this major outage event. GPI has attached a full report to this submission. The report contains a table that breaks down each event and provides full SAIDI/SAIFI values. There were multiple outages over the course of a 24 hour period. During any of the individual outages the maximum percentage of total customer base was 84%. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 19180 84 4 Yes No No further action is required at this time No No No Following the events of July 1 and July 2, 2026, Grimsby Power conducted a review with operations and management staff to assess system performance, restoration activities, and opportunities for improvement. The review concluded that the outage response a

No, all communication methods were available. 10025 0 0 0 19180 0 0 100 0 0 3.75999999046326 1.5900000333786 3 4 Halton Hills Hydro Inc. Halton Hills Hydro Inc. 2026 2026-08-25T12:09:15 2026-07-01T00:00:00 05:13 PM No There was no prior warning that the Major Event would occur. HHHI utilizes a weather surveillance service for notifications of severe weather. The weather surveillance service did not forecast any severe weather on July 1, 2026 for Halton Hills or the surrounding area. NOTE: The outage was a loss of supply incident the originated outside the HHHI license area. Alectra and Hydro One worked together to repair the damage and re-energize the service. HHHI’s Georgetown area is supplied through three (3) sub-transmission lines at the Pleasant Transformer Station by Hydro One. Pleasant TS is located in Brampton, Ontario. On July 1, 2026 at approximately 5pm, a sudden, severe windstorm began over Brampton. At 5:13pm, HHHI experienced a loss of supply lockout on the M23 feeder. At 5:20pm, HHHI experienced a loss of supply lockout on the M28 feeder. There were repeated attempts to reclose the circuit but failed. It was determined that four (4) poles carrying the M23 and M28 circuits, along a busy Brampton regional road and internal to an active Enbridge gas line construction site, had broken due to the storm. The pole line was owned by a third Local Distribution Company (LDC). To restore power, the third LDC was required to wait for police traffic control (the busy regional road was closed) and wait for Enbridge to conduct locates in the active construction site before starting to reset poles that needed to be delivered to the site. Upon completion of locates, the four (4) broken poles were removed and new poles reset. Once the poles were set, Hydro One restrung the conductor for the main feeders. The service was re-energized upon the completion of the conductor install. HHHI would also note that this occurred on a holiday with temperatures reaching the mid 30’s. There was no direct issue with HHHI’s distribution service during this outage. While it was possible to shift some load to other feeders overnight on July 1 to July 2, by mid-morning on July 2, 2026, with temperatures rising, those other feeders were overloaded and HHHI was required to start rolling black outs until the work was completed late in the night on July 2, 2026. There were over 8000 customers interrupted at the beginning of the Major Event. This is equivalent to approximately 35% of Halton Hills Hydro Inc.’s total customer base. More customers were impacted during the restoration phase of the Major Event as rolling black outs were required. External assistance was required by two (2) other distributors as the outage was outside of HHHI’s service territory, in the territory of the third distributor. (Hydro One and Alectra) Loss of Supply Yes, used IEEE Standard 1366 Yes 8407 35 30 Yes Yes Others No HHHI is in conversation with Hydro One to determine what redundancies and line reinforcements can be implemented to avoid this situation from occurring in the future.

Individual calls with customers. After hours call center.

No 8407 0 0 0 8407 0 0 0 0 0 2.12599992752075 0.939999997615814 25 0 Hydro One Networks Inc. Hydro One Networks Inc. 2026 2026-02-20T13:59:14 2025-12-28T00:00:00 12:05 AM Yes Weather conditions were actively monitored. This weather system was identified early as having the potential to escalate into a major event with strong winds, ice accretion, and heavy snowfall, arriving immediately after another weather system System Operations resource levels were adjusted for storm preparation. Additional distribution lines resources were rapidly deployed and extra on-call crews were positioned in areas expected to be most impacted by the storm. Crews were retained on-call throughout the event to ensure sufficient staffing and support expedited restoration efforts Severe freezing rain, strong winds, and snow affected Ontario, producing ice accretion of up to 6 mm and wind gusts ranging from 80–100 km/h, with isolated areas reaching 110 km/h The storm disrupted service to approximately 239,000 customers (16%) between December 28 and December 29, with restoration efforts continuing into December 30 and impacting an additional 13,000 customers (1%) Based on the IEEE 1366 methodology, the period from December 28 to December 29 qualifies as a Major Event Day This is the 5th Major Event in 2025 Approximately 239,000 customers were impacted between December 28th and 29th Approximately 16% of Hydro One’s customer base was interrupted during the event It took 44 hours and 32 minutes from the onset of the Major Event to restore 90% of the interrupted customers • Newmarket Tay Power • Niagara on the Lake Hydro • Grand Bridge Energy • ERTH Power • Tillsonburg Hydro One Inc. • Westario Power • Wellington North Hydro Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 239000 16 44 Yes Yes No further action is required at this time No Yes Yes n/a

n/a

n/a 0 0 0 0 0 0 0 0 0 0 0 0 0 0 Alectra Utilities Corporation Alectra Utilities Corporation 2026 2026-03-23T16:22:26 2026-02-10T00:00:00 4:56 am No On February 10, 2026, numerous sustained outages and momentary interruptions occurred in Alectra Utilities Corporation’s (Alectra) service territory as a result of Adverse Environment (Salt/Contamination). Impacts were most prevalent in the City of Vaughan within the PowerStream Rate Zone. Staff were called out to attend to the outages and restore power in a timely manner. On February 10, 2026, a total of 17 sustained outages and 19 momentary interruptions occurred in Alectra’s service territory. The PowerStream Rate Zone was the primary area impacted, accounting for ten (10) sustained outages and nine (9) momentary interruptions, including four (4) sustained outages and five (5) momentary interruptions experienced within the City of Vaughan. Impacts were driven by three distinct major outage events which occurred at various times of the day on February 10. The first of three major outages began at 4:56 a.m., followed by subsequent outages at 7:03 a.m. and 4:36 p.m. The three major outage events collectively represented 89.6% of the total Customer Hours of Interruption (CHI) which occurred on February 10 across Alectra’s service territory. Events in the Powerstream Rate Zone accounted for 98.9% of the daily total CHI. Adverse Environment was identified as the primary cause of outages. Specifically, customers served by the Greenwood T.S. and Lazenby T.S.2 suffered from insulator flashovers caused by the heavy accumulation of road salt and other environmental contaminants. Alectra took prompt action by accelerating the insulator washing program. Interrupted customers represent 2.5% of Alectra’s customer base on February 10, 2026. Supply to 90% of the customers affected for each of the three events was restored within approximately 3.5 hours. Others Yes, used IEEE Standard 1366 Yes 27266 2.5 4 No No Process improvements No The insulator washing program, which has historically included only porcelain insulators, will be extended to include polymeric insulators to mitigate the risk of pole fires.

Toronto Star

No communication methods became unavailable during the major event. 15289 0 0 0 27266 0 0 100 0 0 2.18400001525879 4.39999997615814E-02 18 17 Alectra Utilities Corporation Alectra Utilities Corporation 2026 2026-03-23T16:31:04 2026-02-20T00:00:00 6:08 am No On February 20, 2026, multiple sustained outages and momentary interruptions occurred in Alectra Utilities Corporation’s (Alectra) service territory as a result of Adverse Environment (Salt/Contamination). The Powerstream and Brampton Rate Zones were impacted. The most severe and significant impacts were concentrated in the Powerstream Rate Zone. Staff were called out to attend to the outages and restore power in a timely manner. On February 20, 2026, a total of 21 sustained outages and 20 momentary interruptions occurred within the Powerstream and Brampton Rate Zones. Impacts were driven by four distinct major outage events which were primarily caused by heavy road salt accumulation and environmental contaminants that compromised overhead electrical infrastructure. The four major outage events collectively represented 80.2% of the total Customer Hours of Interruption (CHI) across Alectra’s service territory occurring on February 20. The Powerstream Rate Zone accounted for 91.4% of the daily total CHI and the Brampton Rate Zone accounted for 7.1% of the daily total CHI. The first of the four major outage events began at 6:08 a.m. on February 20, followed by subsequent outages at 9:13 a.m., 11:39 a.m., and 1:04 p.m. Of the four major outage events, three occurred within the PowerStream Rate Zone, including two pole fires near Highway 407 which affected customers supplied by the Buttonville TS and Greenwood TS and a flashed over switch on Rutherford Road. The pole fire linked to Greenwood TS was particularly disruptive, impacting over 10,000 customers. One major outage event due to tracking insulators occurred within the Brampton Rate Zone. In response, Alectra has accelerated the insulator washing program across the East and Central regions to prevent degradation of overhead electrical insulation caused by salt and other contaminants on the surface of the insulators. Interrupted customers represent 2.2% of Alectra’s customer base on February 20, 2026. The supply to 90% of the customers affected for each of the four events was restored within approximately 6.75 hours. Others Yes, used IEEE Standard 1366 Yes 24013 2.20000004768372 7 No No Process improvements No The insulator washing program, which has historically included only porcelain insulators, will be extended to include polymeric insulators to mitigate the risk of pole fires.

Toronto Star

No communication methods became unavailable during the major event. 17004 0 0 0 24013 0 0 100 0 0 1.98800003528595 2.19999998807907E-02 34 21 Alectra Utilities Corporation Alectra Utilities Corporation 2026 2026-07-02T11:18:55 2026-05-23T00:00:00 1:57 PM No On the afternoon of Saturday, May 23, 2026, Environment Canada issued a weather alert for 30 to 50 mm of rainfall and strong winds in southern Ontario through the evening and overnight period. Ground saturation from heavy rainfall and wind gusts caused power outages due to broken branches and uprooted trees across Hamilton, Markham, Richmond Hill, Barrie, and Penetanguishene. Staff were called out to attend to the outages and restore power in a timely manner. In the Greater Toronto Area, approximately 40 mm in heavy precipitation fell on May 23, which saturated the soil and softened the ground. The combined effects of heavy rainfall and maximum wind gusts of 50–70 km/hour caused power outages due to broken branches and uprooted trees across Hamilton, Markham, Richmond Hill, Barrie, and Penetanguishene. The PowerStream Rate Zone was hit hardest, accounting for 92% of the daily System Average Interruption Duration Index (SAIDI). The Hamilton area was impacted to a lesser extent. The day’s overall severity was largely dictated by four specific incidents within the PowerStream Rate Zone, which collectively represented 34,388.90 Customer Hours of Interruption (CHI), or roughly 87% of the total daily impact across Alectra’s service territory. The first of four major outage events began at 1:57 p.m. on May 23, 2026, followed by subsequent outages at 3:16 p.m., 4:42 p.m., and 5:24 p.m. Adverse weather-related outages accounted for 96% of the daily SAIDI. Interrupted customers represent 3.4% of Alectra’s customer base on May 23, 2026. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 37526 3.40000009536743 5 No No No further action is required at this time No N/A

Toronto Star

No communication methods became unavailable during the major event. 16772 1 0 0 37525 0 0 100 0 0 2.15000009536743 0.034000001847744 30 32 Alectra Utilities Corporation Alectra Utilities Corporation 2026 2026-08-06T08:00:35 2026-07-01T00:00:00 9:50 AM No July 1st began with an extreme heat warning across Southern Ontario. Environment Canada issued a mix of yellow and orange-level severe thunderstorm warnings across the Greater Toronto and Hamilton Area and Central Ontario during the afternoon. Massive atmospheric instability culminated in fast-moving severe weather by late afternoon. Orange alerts represent severe weather that is likely to cause significant damage and disruption under Environment Canada’s colour coded weather-alert system. Orange alerts are uncommon. Yellow alerts are common and represent hazardous weather with moderate impacts. According to CTV News, meteorologists tracked a highly organized line of strong thunderstorms moving rapidly southeast from Lake Huron at speeds near 90 km/h. Environment Canada warned that the system brought a volatile combination of destructive wind gusts reaching up to 100 km/h, torrential downpours dropping up to 30 mm of rain in short windows, and quarter-sized hail. The extreme temperatures caused localized thermal overloads and required load balancing in the Horizon Rate Zone. The subsequent storm caused a significant number of customer interruptions. Strong winds led to fallen trees in Horizon, Brampton and PowerStream Rate Zones and several broken poles. These extreme weather conditions were most prevalent in the Horizon Rate Zone, which accounted for approximately 63% of the total daily SAIDI. Adverse weather-related outages accounted for 69% of the daily SAIDI. Interrupted customers represent 2.8% of Alectra Utilities’ customer base on July 1, 2026. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 30396 2.79999995231628 12 Yes No No further action is required at this time No N/A

Toronto Star

No communication methods became unavailable during the major event. 6796 0 0 0 30396 0 0 100 0 0 2.20000004768372 3.59999984502792E-02 44 47 Bluewater Power Distribution Corporation Bluewater Power Distribution Corporation 2026 2026-02-05T15:32:23 2025-12-26T00:00:00 12:00 PM Yes There were watches and warnings posted through weather services about a potential weather event in our service area. This weather event happened during a time period when our office was closed. The imminent weather event warnings were communicated on the evening prior to the event and due to timing over holidays extra staff were not available. Supervisors and management were in communication with the Stand-by crew regarding the potential storm impact and how we would proceed with restoration efforts should outages occur. Winter storm with ice warning passed through the area with high winds causing tree contact and branches on lines in various locations throughout our service area. Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 17619 47 3 No No No further action is required at this time No No Yes

Telephone Line. 17279 0 0 0 17619 0 0 100 0 0 0.541000008583069 0.47299998998642 13 129 Burlington Hydro Inc. Burlington Hydro Inc. 2026 2026-09-03T09:41:08 2026-07-09T00:00:00 2:38 PM No N/A N/A Around 2:38 PM on July 9th, a brief storm came through the city of Burlington bringing heavy rainfall and wind speeds of 93km/h causing outages across the city. N/A Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 9782 14.0100002288818 8 Yes No No further action is required at this time No No No N/A

Outage map, available through BHI website

No communication methods became unavailable during the major event. 5470 212 12 0 9558 0 15 33 12 40 0.488000005483627 0.140000000596046 48 82 Centre Wellington Hydro Ltd. Centre Wellington Hydro Ltd. 2026 2026-02-23T13:38:29 2025-12-24T00:00:00 4:47 AM No Environment Canada had issued a Special Weather Statement in our area, for the overnight, of December 23, 2025. Centre Wellington Hydro Ltd. received a customer call indicating their power was out on December 24, 2025, at 4:47 am. It soon became apparent that all CWH’s service area in Elora, Ontario, was without power. This unplanned power outage was later determined to be caused by Loss of Supply, Distribution (Cause Code 2.2). CWH’s Elora customers are supplied by a shared Hydro One 44kV feeder. Loss of Supply Yes, used IEEE Standard 1366 Yes 2264 30 5 Yes No No further action is required at this time No Discussions with Operations staff after the major outage continued and no alterations to current practices in addressing such outages are required.

No 2264 0 0 0 0 0 0 100 0 0 1.46000003814697 0.300000011920929 1 1 Centre Wellington Hydro Ltd. Centre Wellington Hydro Ltd. 2026 2026-02-24T15:42:04 2026-01-30T00:00:00 3:30 AM No NA Centre Wellington Hydro Ltd.’s Operations Manager received a phone call from Hydro One’s control room at 3:32 am on January 30, 2026, informing him that CWH’s service area in both Elora and Fergus were currently without power. This unplanned power outage was later determined to be caused by Loss of Supply, Distribution (Cause Code 2.2). At 4:30 am on January 30, 2026, Hydro One was able to restore Fergus M7 which restored power to CWH’s customers in Elora. At 5:15 am on January 30, 2026, Hydro One was able to restore Fergus M3 which restored power to CWH’s customers in Fergus. At the start of the event all 7,648 CWH customers were impacted, 100% of our customers. The Elora (Fergus M7) power outage affected all 2,274 CWH customers in Elora, or ~30% of CWH total customers. The power outage affected all 5,374 CWH customers in Fergus, or ~70% of CWH total customers. Loss of Supply Yes, used IEEE Standard 1366 No 7648 100 2 Yes No No further action is required at this time No Discussions with Operations staff after the major outage continued and no alterations to current practices in addressing such outages are required.

No. 7648 0 0 0 0 0 100 100 100 0 1.51999998092651 1 2 1 Centre Wellington Hydro Ltd. Centre Wellington Hydro Ltd. 2026 2026-07-28T15:12:39 2026-07-01T00:00:00 4:55 PM Yes CWHs service area was under an Environment Canada orange-level heat warning and yellow-level thunderstorm warning when the unplanned event occurred. CWH ensured that all staff was available and able to respond if required, including the regular scheduled on-call crew as well as those line crew members who were not scheduled to be on-call. Centre Wellington Hydro Ltd.’s Operations Manager received a phone call from Hydro One’s control room at 4:55 pm on July 1, 2026, informing him that CWH’s service area in Fergus was currently without power. This unplanned power outage was later determined to be caused by Loss of Supply, Distribution (Cause Code 2.2). At 7:45 pm on July 1, 2026, Hydro One authorized use of an alternate supply which restored power to CWH’s customers in Fergus. The power outage affected all 5,374 CWH customers in Fergus, or ~70% of CWH total customers. Loss of Supply Yes, used IEEE Standard 1366 No 5374 70 2 Yes No No further action is required at this time No Yes Yes Debrief with Operations staff after the major outage continued and no alterations to current practices in addressing such outages are required.

No 5374 2 0 0 5372 0 0 100 0 0 2.11999988555908 0.709999978542328 1 1 Elexicon Energy Inc. Elexicon Energy Inc. 2026 2026-08-28T11:54:00 2026-07-01T00:00:00 17:40 PM No Environment Canada did not issue any official storm warnings related to severe weather in Elexicon Energy’s service territory. There was an ongoing heat warning that Elexicon was monitoring. On July 1, severe thunderstorms and high winds contributed to widespread and prolonged power outages across Ajax, Pickering, Whitby and the broader Clarington area including Port Hope. These areas experienced extended interruptions due to storm-related damage with downed trees and branches on power lines. n/a Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 25801 14 6 Yes No No further action is required at this time No Elexicon continues to build upon its emergency management program, which already incorporates Ontario’s Incident Management System best practices into its response; we updated our Power System Restoration Plan in 2026 to modernize our response practices,

Yes, in the initial few hours following the event, Elexicon experienced a technical issue with its outage map, outage information hotline and X. The issue was resolved later in the evening. 11815 0 0 0 25801 0 30 24 39 7 0.28999999165535 0.142000004649162 20 33 Enova Power Corp. Enova Power Corp. 2026 2026-02-27T11:25:45 2025-12-28T00:00:00 1:52 EST Yes Enova Power Corp. receives alerts from Environment Canada when severe weather alerts, watches or warnings are issued that affect any part of Enova’s service territory. On December 28, 2025, at approximately 9:00 a.m., Enova received severe weather alerts warning of freezing rain and high winds impacting portions of its service territory. Enova has two System Operators on duty at all times. In addition, two Powerlines Technician Supervisors on-call and four Powerline Technicians on-call at all times outside of regular operating hours. Arrangements for additional staff to be on duty or on standby were not made for this event. A winter storm tracked through Southwestern Ontario in the afternoon and evening on Sunday December 28 and Monday December 29, 2025. The storm brought freezing rain, significant temperature swings and high winds ranging from 70 to 100 km/h. NA Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 46772 28.2000007629395 18 Yes No Others No Yes Yes Enova’s staff are trained to be on alert for emergencies and major events. Enova’s has implemented several grid modernization technologies and will continue to do so to increase system reliability and operational efficiencies through Survalent’s Fault Loc

Enova’s outage management portal, company website, and newsroom/blog.

Yes, the outage map was impacted for approximately two hours from 6:30 pm to 8:30 pm December 28, 2025. 6975 376 5 0 46396 0 46 28 38 100 0.333000004291534 0.228000000119209 20 87 Hydro One Networks Inc. Hydro One Networks Inc. 2026 2026-07-27T15:50:06 2026-05-23T00:00:00 1:37 AM No N/A High wind and heavy rain hit the province and caused a high number of power outages. Some areas saw wind gusts up to 80 km/h. This storm impacted a total of approximately 76,000 (5%) customers on May 23, and the restoration extended into May 25 and impacted approximately 31,000 (2%) additional customers. The day, May 23, is qualified as the Major Event Day based on IEEE 1366 methodology. This is the 3rd Major Event in 2026. Approximately 5% of Hydro One’s customer base was interrupted during the event. Adverse Weather-Wind Yes, used IEEE Standard 1366 No 76000 5 36 Yes No No further action is required at this time No N/A

media interviews with media outlets in affected areas

no 37120 3668 0 0 72280 0 5 51 7 37 0.360000014305115 5.00000007450581E-02 287 386 Hydro One Networks Inc. Hydro One Networks Inc. 2026 2026-07-31T12:39:14 2026-05-29T00:00:00 6:21 AM No N/A N/A Severe thunderstorms accompanied by high winds moved from Northwestern Ontario towards Central and Eastern Ontario, resulting in widespread power outages. Wind gusts reached up to 80 km/h in some areas. On May 29, the storm impacted approximately 132,000 customers (9% of total customers). Restoration activities extended through June 1, with an additional approximately 53,000 customers (4% of total customers) affected during the restoration period. In accordance with IEEE 1366 methodology, May 29 was designated as a Major Event Day (MED) This is the 4th Major Event in 2026 Approximately 132,000 customers were impacted on May 29th, 2026 Approximately 9% of Hydro One’s customer base was interrupted during the Major Event Adverse Weather-Wind Yes, used IEEE Standard 1366 No 132000 9 44 No No No further action is required at this time No N/A

media interviews with media outlets in affected areas

No 101516 20824 3204 0 107763 0 2 25 3 69 1.30999994277954 9.00000035762787E-02 422 620 Hydro One Networks Inc. Hydro One Networks Inc. 2026 2026-08-12T15:44:32 2026-06-13T00:00:00 1:26 AM Yes An awareness notification regarding the potential for severe thunderstorms was sent. Arrangements would be made as needed due to the weather prediction in several regions. Resources remained available to be mobilized as required based on actual conditions. On June 13, a severe and fast-moving thunderstorm produced strong winds across the province, with wind gusts reaching 70 to 80 km/h in some areas. The event resulted in outages affecting approximately 49,000 customers (3% of the customer base). Restoration activities extended through June 16 and impacted an additional approximately 86,000 customers (6%). Based on the IEEE 1366 methodology, June 13 qualifies as a Major Event Day. Approximately 49,000 customers were impacted on June 13th. Approximately 3% of Hydro One’s customer base was interrupted during the event. Adverse Weather-Wind Yes, used IEEE Standard 1366 No 49000 3 43 No No No further action is required at this time No No No None

interviews with media outlets of all formats not just radio

No 32689 5291 477 0 42820 0 4 51 3 43 0.330000013113022 2.99999993294477E-02 188 291 Hydro One Networks Inc. Hydro One Networks Inc. 2026 2026-09-02T16:45:58 2026-06-30T00:00:00 12:30 AM Yes Hydro One proactively monitors weather patterns to ensure restoration crews can be dispatched efficiently across our service territory. The weather forecasts for this major event provided early warning to allow for early communications and preparations. Teams were on alert to maintain continuous communications to manage emerging issues, including staffing levels adjustment to ensure adequate coverage. Severe thunderstorms accompanied by high winds and extreme heat impacted Hydro One's service territory between June 30 and July 3, 2026. Some areas experienced wind gusts of up to 120 km/h resulting in widespread outages across the province. In response to the severity of the event, Hydro One's Control Centre declared a Level 2 Emergency Response on July 1, 2026. From June 30 through July 3, the event affected approximately 525,000 customers, representing 35% of Hydro One’s customer base. Restoration activities continued into July 4 and affected approximately 19,000 additional customers, representing 1% of Hydro One’s customer base. Consistent with IEEE Standard 1366 methodology, June 30 through July 3, 2026 were classified as Major Event Days. This event represents Hydro One's sixth Major Event in 2026. Approximately 525,000 customers were impacted during June 30th – July 3rd, 2026. Approximately 35% of Hydro One’s customer base was interrupted during the event Orangeville Hydro, Sault Ste. Marie Hydro, Town of Tillsonburg Hydro, ENWIN Utilities, Wellington North Power, Cornwall Electric Distribution, Niagara-on-the-Lake Hydro, Greater Sudbury Hydro, ERTH Power Corporation, Westario Power Adverse Weather-Wind Yes, used IEEE Standard 1366 No 525000 35 85 Yes Yes No further action is required at this time No Yes Yes None

Interviews with media outlets

No 167469 40006 8272 263 476725 7 8 36 12 44 3.19000005722046 0.349999994039536 1080 2403 Hydro Ottawa Limited Hydro Ottawa Limited 2026 2026-05-15T13:46:08 2026-03-17T00:00:00 2:57 AM Yes In the early afternoon of Saturday, March 14, 2026 a forecast predicted strong wind gusts and freezing rain for the late morning of Tuesday, March 17, 2026. The on-call management team was immediately notified and maintained a close watch on the weather patterns throughout the remainder of the weekend. At 1:30 p.m. on Monday, March 16, 2026 the team convened to evaluate the updated forecast and finalize resourcing decisions ahead of the forecasted weather event. During this meeting, it was noted that while the potential for high winds and light mixed precipitation remained, the projected timing of the peak gusts had shifted to earlier Tuesday morning around 8:00 AM. Based on the forecasted timing of the weather event, Hydro Ottawa determined that additional staffing arrangements were unnecessary prior to the onset of the storm. Because the high winds were projected to arrive at approximately 8:00 AM, the on-call management team concluded that the event would coincide with the start of the regular business day when all regular staff would already be on-site and available for immediate deployment. Furthermore, by opting not to activate extra resources prematurely, the utility preserved the available on-call staff, ensuring that personnel would not reach their hourly limits should the event persist into the evening and require extended response efforts. The combination of flash-freeze conditions and high winds on March 17, 2026 resulted in widespread system outages. These environmental factors caused instances where overhead conductors made contact with each other and instances of downed wires across the service area. Adverse Weather-Wind Yes, used IEEE Standard 1366 No 62531 16.5 14 Yes No Others No Yes No To mitigate the impact of future major events, Hydro Ottawa has identified several technical and process improvements. The company continues to prioritize the replacement of older porcelain insulators, which were identified as a recurring point of failure

Banner and message on the distributor's outage map

No 28080 0 0 0 62531 0 3 63 34 0 0.280000001192093 0.165000006556511 53 32 Hydro Ottawa Limited Hydro Ottawa Limited 2026 2026-08-26T16:21:42 2026-07-01T00:00:00 2:14 PM Yes Hydro Ottawa received prior warning of potentially impactful weather on July 1st, 2026 and the On-Call management team was actively monitoring the forecast and real time conditions throughout the day. Early in the morning, Environment Canada issued an orange heat warning for extreme temperatures reaching up to 35°C (with a humidex approaching 46°C). By 1:30 PM, the agency escalated alerts by issuing a severe thunderstorm watch, noting conditions were favourable for developing storms. Shortly after 2:30 PM, a severe thunderstorm warning was issued noting severe weather capable of producing damaging wind gusts, large hail, and torrential rainfall. At 4:30 PM, as the event began to escalate, the On-Call team convened to evaluate real-time conditions and available resources. The subsequent historic storm delivered high winds (with recorded gusts exceeding 70 km/h) and a 1-in-200-year rainfall event, dumping between 100 mm to over 167 mm of rain across parts of the city in just a few hours. July 1st being a statutory holiday, regular day crews were not scheduled to work. However, per standard holiday protocol, the scheduled Power Line Maintainer (PLT) complement was increased to 10 staff members instead of the 6 typically scheduled for non-holiday weeks. Due to unrelated events earlier in the day, all On-Call trade staff were deployed prior to the storm (10xPLTs, 2xPower Cable Technicians, and 2xStation Electricians) All staff were instructed to remain on standby due to the issued weather warning. Additionally, at 3:00 PM, a decision was made to halt a planned mutual aid deployment to assist Hydro One, retaining an additional 6 PLTs and 1 Supervisor locally. In total, 16xPLTs, 2xPCTs, and 2 Stations Electricians were on standby at various work centres as the major system impact began. An Everbridge (Mass Notification) availability alert was also broadcast to 112 staff members to survey availability of resources following the 4:30 PM On-Call meeting. Characterized by severe thunderstorms and a historic 1-in-200-year rainfall event, the storm dumped up to 167mm of rain across the city in just a few hours. The intense precipitation was compounded by high winds, with recorded gusts exceeding 70km/h, which led to extensive tree contacts, downed branches, and significant equipment breakage. Furthermore, the large volume of water quickly forced storm sewer systems past their maximum capacity. The resulting flash flooding inundated local streets and poured into residential basements, causing multiple outages and extensive property damage, impeding restoration efforts. On July 1, concurrent outages peaked at 36k customers. Across the full 24-hour period, total outage instances reached roughly 162k, which also accounts for repeat disruptions. Adverse Weather-Wind Yes, used IEEE Standard 1366 No 162531 43 10 Yes No Others No Yes No In accordance with internal processes, the organization is conducting a post-event review following this major event to revise relevant plans and procedures. As part of the after-action report, the following areas are currently being evaluated: Governance

Media release, participating in the City's emergency press conference, responding to media inquiries (giving interviews), a banner on the outage map, banner on the website, Memo to Council (shareholder communication)

No 39555 1572 63 0 160896 0 74 40 57 26 0.579999983310699 0.430000007152557 87 65 InnPower Corporation InnPower Corporation 2026 2026-07-21T14:21:00 2026-07-01T00:00:00 4:18:27 PM No InnPower was provided warning of Severe Thunderstorm risk via online weather alert services at approximately 13:25 on July 1, 2026. While we typically receive a couple of days' advance notice of weather events, this event provided very little lead time. Innisfil was hit by a fast-moving severe thunderstorm that developed after an extremely hot and humid day. The storm brought torrential rain and powerful wind gusts, creating hazardous conditions across the community and on Lake Simcoe. This brief but intense storm produced significant wind damage and widespread power outages. Innisfil contains pockets of dense forest throughout the municipality. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 8008 33 8 No No No further action is required at this time No All responses were handled in a timely manner, and power was restored efficiently using all available resources despite the extensive storm damage throughout the area.

No. 8008 31 0 0 7977 0 14 12 20 54 1.37999999523163 0.319999992847443 11 109 London Hydro Inc. London Hydro Inc. 2026 2026-02-23T08:25:18 2025-12-26T00:00:00 1:51 PM Yes Though Environment Canada issued typical winter weather warnings of freezing rain and snow, the actual weather experienced in the City was not typical, but rather a major winter storm that resulted in wide scale power outages. London Hydro had extra employees on standby prior to the storm. On Friday December 26th at approximately 12:31 PM, a freezing rain storm hit London Hydro’s distribution area. The resulting freezing rain coated trees and power lines with a significant accumulation of ice. The weight of the ice caused tree branches to come down and further equipment breakage. The following OEB cause codes were main contributing causes to classify this Major Event Day: Adverse Weather - Tree Contact Weather N/A Festival Hydro Others Yes, used IEEE Standard 1366 Yes 58955 35 13 No Yes Others No Yes No London Hydro has an Emergency Procedures Plan; training and mockups are performed annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of extensive damage to London Hydro

CTV, LFP, CBC and other news sources

No 16449 18 0 0 58937 0 21 9 15 55 0.870000004768372 0.349999994039536 23 33 London Hydro Inc. London Hydro Inc. 2026 2026-07-16T15:48:26 2026-05-19T00:00:00 5:18 PM No Environment Canada issued typical weather warnings of thunderstorms and windy weather, but it did not call for such major event causing tornado-like winds that were seen. On Tuesday May 19th, at approximately 5:00 PM, a severe storm – featuring two tornadoes and a downburst – hit the London area, bringing heavy rain, lightning and powerful wind gusts up to 145 km/hr. This was confirmed by Western University’s Northern Tornadoes Project (Two tornadoes and a downburst on May 19 in the London, ON area, blog post May 19, 2026) The storm caused significant damage to the system due to a number of large trees uprooted, large branches torn from trees, and downed hydro poles. Adverse Weather - Tree Contact Weather was the main OEB cause code for this Major Event Day. N/A Enwin Utilities Ltd. Others Yes, used IEEE Standard 1366 No 13233 7.80000019073486 20 No Yes Others No London Hydro has an Emergency Procedures Plan; training and mockups are performed annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of extensive damage to London Hydro

Yes, London Hydro’s outage map stopped updating briefly the day after the storm (May 20) while there were still some areas without power. 5377 77 0 0 13156 0 19 23 30 28 0.310000002384186 7.99999982118607E-02 11 121 Milton Hydro Distribution Inc. Milton Hydro Distribution Inc. 2026 2026-08-27T12:54:51 2026-07-01T00:00:00 05:11 PM Yes On Wednesday, July 1st, 2026, a Yellow Level Severe thunderstorm alarm from Environment and Climate Change Canada was received at approximately 4:55 PM EDT. The Environment Canada forecast did not provide sufficient time for Milton Hydro to place additional employees on duty or on standby prior to the Major Event beginning. However, it is Milton Hydro’s common practice to have on-call personnel on standby on after-hours, weekends, and holidays. Milton Hydro did not have sufficient advance storm-specific information to issue an alert to the public warning of possible outages (question #3). The main contributing Cause of the Major Event as per the table in section 2.1.4.2.5 of the Electricity Reporting and Record Keeping Requirements was Cause Code 6.1 Adverse Weather - Tree Contact. On July 1, 2026, Milton was affected by a severe thunderstorm event associated with a broader weather system that impacted much of southern Ontario. The storm developed in an environment of extreme heat and humidity and produced strong wind gusts, heavy rainfall, and lightning. The storm resulted in multiple widespread outages simultaneously across Milton Hydro’s rural service territory, increasing restoration complexity and extending response requirements. The predominant cause of the outages during this event was due to tree contacts, broken branches, and damage to overhead distribution infrastructure resulting from wind gusts. N/A Oakville Hydro. Others Yes, used IEEE Standard 1366 Yes 1915 4.19999980926514 12 Yes Yes No further action is required at this time No No No Milton Hydro conducted a review of its outage response / storm mode for this outage and determined that the response was conducted in a safe, effective, and controlled manner. No further action is required at this time.

N/A

No. 1915 0 0 0 1915 0 100 100 100 100 0.126540005207062 4.17799986898899E-02 4 1 Milton Hydro Distribution Inc. Milton Hydro Distribution Inc. 2026 2026-08-27T12:59:56 2026-07-09T00:00:00 02:50 PM Yes On Thursday, July 9th, 2026, a Yellow Level Severe thunderstorm alarm from Environment and Climate Change Canada was received at approximately 2:11 PM EDT. Upon becoming aware of the deteriorating weather conditions, Milton Hydro activated it’s Emergency Storm Response Procedure and reassigned resources across multiple departments towards the restoration effort, with the highest priority addressing public safety hazards from damaged lines. The main contributing Cause of the Major Event as per the table in section 2.1.4.2.5 of the Electricity Reporting and Record Keeping Requirements was Cause Code 6.1 Adverse Weather - Tree Contact. On July 9, 2026, Milton Hydro's distribution system was impacted by a severe storm which included wind gusts reaching up to 90 km/h, heavy rainfall, hail, and frequent lightning activity. These conditions caused wind-driven tree contacts and broken branches that damaged conductors and other distribution system infrastructure. The widespread nature of the storm produced multiple outage locations simultaneously, increasing restoration complexity and extending response requirements. N/A Orangeville Hydro. Others Yes, used IEEE Standard 1366 Yes 8420 18.3999996185303 4 No Yes No further action is required at this time No Yes Yes Milton Hydro conducted a review of its outage response / storm mode for this outage and determined that the response was conducted in a safe, effective and controlled manner. No further action required at this time.

N/A

No. 8028 0 0 0 8420 0 100 100 100 100 0.400000005960464 0.183689996600151 3 1 Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2026 2026-08-05T10:28:52 2026-05-18T00:00:00 20:17 Yes Environment Canada issued a forecast for May 18, 2026, indicating a moderate risk of thunderstorms, with expected high wind gusts and the potential for hail. NT Power had a full complement of standby staff and extra staff who could be called out to respond to possible power outages Loss of Supply and Adverse Weather - Wind. Environment Canada issued a forecast for May 18, 2026, indicating a moderate risk of thunderstorms, with expected high wind gusts and the potential for hail. 46%(M4) of affected customers were restored within 1.99 hours and remaining 54% (M2) was restored within 3.27hours. Loss of Supply Yes, used IEEE Standard 1366 Yes 5169 11.5 3 Yes No No further action is required at this time No Yes No Major Event was due to adverse weather conditions; therefore, no further action is required by NT Power at this time.

No 5169 0 0 0 5169 0 0 100 0 0 0.300000011920929 0.109999999403954 23 2 North Bay Hydro Distribution Limited North Bay Hydro Distribution Limited 2026 2026-08-27T15:42:28 2026-06-30T00:00:00 6:51 PM No On June 30th, 2026, the North Bay region experienced a large storm with unusually high winds in the early evening, causing many power outages across the North Bay Hydro service area. North Bay Hydro crews confirmed that the issues originated from the high winds knocking down trees into the sub-transmission and distribution lines, causing broken conductors, crossarms and feeder breakers to trip with trees resting on the lines. This storm affected a total of 5467 customers (19% of total customers), and restoration efforts were an immediate response from North Bay Hydro that continued into July 1st and July 2nd. A storm came through the North Bay area on June 30, 2026, with extremely high winds and moderate to heavy rainfall in the early evening causing lots of trees and branches to come down. These factors caused broken poles, broken crossarms, and broken conductors within the service area. North Bay Hydro prioritized safety during this time and made sure crews were dispatched first to broken conductor calls from the public, where emergency responders were dispatched and then focusing on the larger M class feeders. North Bay Hydro deployed damage assessment crews to document where and what had been broken, causing the power outages. Greater Sudbury Utilities Adverse Weather-Wind Yes, used IEEE Standard 1366 No 5467 19 15 No Yes No further action is required at this time No

No 4397 298 0 0 5169 0 70 35 60 100 0.930000007152557 0.230000004172325 7 34 Oakville Hydro Electricity Distribution Inc. Oakville Hydro Electricity Distribution Inc. 2026 2026-01-09T10:40:06 2025-11-16T00:00:00 02:13 PM No There was no prior warning of the brief, localized high wind gusts that ultimately caused the outage. As such, the event could not be reasonably predicted in advance. On November 16, 2025, around 2:13 p.m., high winds caused a tree located on private property beyond Oakville Hydro’s vegetation management clearance zone, which maintains at least 10 feet from primary overhead lines and 3 feet from secondary lines, to fail and fall onto overhead distribution lines. The damage resulted in a major outage affecting the southwest Oakville area, from Burloak Drive to Bronte Road and from the CNR tracks to Lakeshore Road. Crews were dispatched immediately to secure the area, ensure public and worker safety, and begin restoring power to affected customers. The event was unpredictable as it was “beyond the control of the distributor.” Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 3305 4.09999990463257 2 No No No further action is required at this time No No Oakville Hydro invests in a four-year vegetation management program, and the section where the event occurred (Zone 1) was last maintained two years prior, fully in line with this cycle. The fallen tree was located on private property, well outside the ve

No 3305 0 0 0 3 0 0 100 0 0 7.99999982118607E-02 3.99999991059303E-02 1 1 Orangeville Hydro Limited Orangeville Hydro Limited 2026 2026-04-27T14:34:55 2025-12-28T00:00:00 03:47 PM Yes Yes. Environment Canada warned of a high impact ice storm set to hit Central Ontario. Yes. On-call staff and contractors were available. The main contributing cause of the Major Event was freezing rain accumulation causing tree branches to break and contact overhead powerline and damage distribution infrastructure. This occurred in Orangeville Hydro’s service territory and upstream in Hydro One’s service territory. n/a Wellington North Power Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 4293 33 3 Yes Yes Additional staff training No Yes Yes Continued staff training, continued use of technology for tracking influx of individual customer issues, implement maintenance program improvements, and targeted removal of private problem-trees are examples of actions that are being taken. Storm debriefi

n/a

No 4293 0 0 0 4293 0 0 87 13 0 1.1599999666214 0.46000000834465 2 8 PUC Distribution Inc. PUC Distribution Inc. 2026 2026-05-12T16:23:59 2026-05-01T00:00:00 09:53 AM No The contributing cause was Loss Of Supply – Cause Code 2. Interruption due to problems associated with the transmission system owned by Hydro One. Loss of Supply Yes, used IEEE Standard 1366 Yes 34411 100 1 Yes No Others No PUC is reviewing the outage details with Hydro One (transmitter) and requested a detailed report that will include the root cause of the outage and process improvements being implemented that will prevent a similar occurrence in the future. Post outage re

All communications methods used were available. 34411 0 0 0 34411 0 100 100 100 100 1.08329999446869 1 4 2 PUC Distribution Inc. PUC Distribution Inc. 2026 2026-06-23T16:29:21 2026-06-19T00:00:00 5:26 AM No The contributing cause was Foreign Interference - Wildlife – Cause Code 9. Bird contact with 34.5KV high voltage main breaker bushing that interrupted power to half of PUC Distribution transmission station. Others Yes, used IEEE Standard 1366 Yes 11812 344 1 No No Others No PUC continues to review and implement measures to reduce the likelihood and impact of future major event outages. This includes evaluating deterrent equipment and protective devices to minimize animal contact with electrical infrastructure. Following majo

No, All communications methods used were available. 11812 0 0 0 11812 0 100 100 100 100 0.28999999165535 0.340000003576279 3 1 PUC Distribution Inc. PUC Distribution Inc. 2026 2026-08-14T10:04:25 2026-05-15T00:00:00 10:38 AM No No, there was no prior warning. The contributing cause was Foreign Interference - Wildlife – Cause Code 9. Customers were restored by transferring load to other circuits; however, the 115 kV line remained isolated until a detailed inspection was completed. The inspection lasted several hours as crews patrolled the transmission lines owned by PUC Distribution and Hydro One. During the initial investigation, no cause was identified. The line was subsequently re-energized with crews remaining onsite to monitor the system, and power was successfully restored. Following the outage, it was reported that contact with the line had occurred, which was determined to be the cause of the outage. It took 13 minutes or .2167 hours to restore 90% of customers who were interrupted. Others Yes, used IEEE Standard 1366 Yes 12035 35 0 No No Others No PUC Distribution has a comprehensive Emergency Preparedness and Restoration Plan that is continually being updated (Rev. 16 approved on 12/18/2025). General training and drills associated with the IESO Emergency Preparedness Plans are executed throughout

Damage assessments were conducted at St.Mary’s TS-1, Hydro One’s 115KV Transmission Line, and PUC Distribution 115KV line. Customers were restored by picking up load from other circuits but the 115KV line remained isolated until a detailed inspection was

All communications methods used were available. 11791 0 0 0 12035 0 100 80 100 100 0.28999999165535 0.349999994039536 2 3 Toronto Hydro-Electric System Limited Toronto Hydro-Electric System Limited 2026 2026-05-05T15:22:55 2026-03-07T00:00:00 07:58 PM No As the Major Event was initiated by a Loss of Supply, Toronto Hydro did not have any prior warning the Major Event would occur. This Major Event was caused by a loss of supply from Hydro One. On March 7, 2026, at 7:58 PM, the Main Transformer Station (TS) T4 transformer was removed from service due to a fault in the Gas Insulated Line (GIL) system. Additionally, since the T3 transformer was unavailable due to replacement at the time of the event, the outage of T4 caused a 44 MW power loss to downstream distribution customers. Hydro One staff identified and addressed the fault in the system, allowing the T4 transformer to be restored to service by 11:59 PM. A total of 15,860 distribution customers in Toronto Hydro’s service area were impacted, with power restored to 90% of them within 4 hours. Loss of Supply Yes, used IEEE Standard 1366 Yes 15860 2 4 Yes No No further action is required at this time No Regular coordination meetings are held between Toronto Hydro and Hydro One to identify potential risks and impacts associated with any planned or coordinated work undertaken by either utility that could affect the quality and reliability of service at the

No. 16104 0 0 0 15860 0 0 100 0 0 4.17999982833862 1.99999995529652E-02 25 1 Toronto Hydro-Electric System Limited Toronto Hydro-Electric System Limited 2026 2026-07-22T16:39:54 2026-05-23T00:00:00 09:59 AM No The forecast did not indicate weather conditions that would reasonably require additional preparation. Wind gusts were forecasted to be a maximum of 66 km/h, which indicated a potential increase in outages. However, the forecasted conditions were not indicative of widespread or severe impacts. On May 23, 2026, the City of Toronto experienced an extreme weather event lasting approximately 18 hours, primarily between 6:00 a.m. and midnight. Total rainfall ranged from 40 to 55 mm, with the highest amounts recorded in the downtown/island areas. Wind speeds began increasing around 12:00 p.m. on May 23, with frequent gusts of 50–65 km/h observed across the service area through to midnight. Peak wind gusts reached up to 72 km/h at several intervals during the afternoon and evening, particularly in the downtown and island regions. These conditions resulted in significant damage to Toronto Hydro’s infrastructure. High winds caused tree contacts and equipment damage across the distribution system, resulting in customer interruptions across the city. Restoration efforts commenced immediately, while scattered showers persisted into the early morning of May 24. Approximately 7.71% of the customer base was interrupted during the Major Event. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 61126 8 16 No No No further action is required at this time No Toronto Hydro's Disaster Preparedness Management program prepares the company to respond to a wide range of large-scale emergencies. Its goal is to increase the company's ability to safely, effectively and efficiently respond to large-scale emergencies. T

No. 14511 1 0 0 61125 0 18 21 15 46 3.91000008583069 7.99999982118607E-02 27 108 Wasaga Distribution Inc. Wasaga Distribution Inc. 2026 2026-01-14T13:41:03 2025-12-29T00:00:00 19:18 PM Yes Environment Canada issued a squall warning for our service area. All field staff was made aware of potential for incidents and were on standby. A 44kV tap burned off due to high winds. N/A Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 9765 62 3 No No Process improvements No Yes Yes Wasaga Distribution has: • Debriefed staff to discuss lessoned learned, including but not limited to the following topics: • prioritizing calls, • tracking all calls, • improve communications with Staff, Hydro One, and Customers • Confirmed the existing m

N/A

No 9765 0 0 0 9765 0 0 100 0 0 1.85399997234344 0.620599985122681 10 2 Wasaga Distribution Inc. Wasaga Distribution Inc. 2026 2026-07-22T10:10:56 2026-05-17T00:00:00 08:00 AM No N/A This outage was reported under Cause Code 5.1 - Equipment Failure. WDI experienced a widespread outage following the sudden failure of the station transformer at MS1. The transformer station had been maintained in accordance with WDI's preventative maintenance and asset management programs, including monthly inspections (including operating temperature monitoring, load monitoring, routine visual inspections), periodic diagnostic testing, including transformer oil testing and dissolved gas analysis. Review of the available records identified no abnormal operating conditions, deterioration trends, loading concerns, alarm conditions, or diagnostic test results that would reasonably have predicted or indicated an imminent failure. The transformer had approximately 25 years of service life; however, neither its age nor its condition assessment history identified a need for replacement, refurbishment, or additional intervention prior to the event. Based on the information available before the event, WDI had no reasonable basis to anticipate the failure and no indication that additional inspection or maintenance activities would have identified the failure mechanism prior to its occurrence. WDI therefore submits that the event meets the Major Event criteria as an unforeseeable and unpreventable occurrence despite prudent utility inspection, maintenance, and asset management practices. N/A Others Yes, used IEEE Standard 1366 Yes 9765 62 4 No No Others No Wasaga Distribution has: - Debriefed operating and line crews and retained switching orders and restoration documentation for future training and reference purposes - Reviewed the maintenance history and condition monitoring records associated with the fa

N/A

No 9765 0 0 0 9765 0 0 100 0 0 1.50999999046326 1.25999999046326 1 5 Wellington North Power Inc. Wellington North Power Inc. 2026 2026-01-06T15:29:08 2025-12-19T00:00:00 12:40 pm No Fault downstream of the KER reclosure resulting in a Loss of Supply to the 44kV that feeds Wellington North Power Inc. affecting the LDC’s service area of Mount Forest. During the whole day, strong winds and ice on lines caused galloping powerlines were observed. WNP is an embedded distributor; Hydro One is the host distributor. Due to the Loss of Supply, WNP’s substations MS1 and MS2 were without power. HONI and WNP crews performed line-switching to restore the 44kV supply to WNP. For 90% of customers, the power was restored at 6:29 pm on December 19, 2025. Outage was 5.82 hours (349 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 1708 38 6 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Hydro One Integrated System Operating Centre (ISOC).

Yes, telephone line 1708 0 0 0 1708 0 0 50 50 0 2.01999998092651 0.379999995231628 8 2 Alectra Utilities Corporation Alectra Utilities Corporation 2025 2025-05-13T10:58:00 2025-03-29T00:00:00 8:41 AM Yes Weather alerts were provided by Environment Canada and other media sources in the days preceding the storm, warning of a spring ice storm with 15 to 20 mm ice accretion from freezing rain forecasted for central and eastern Ontario between March 28 and 31, 2025. In anticipation of the adverse weather event, additional staff were made available for the forecast storm period. Additionally, Alectra’s Communications team regularly prepares for emergency situations. On-call staff from the Communications and Government Relations teams were made aware of the incoming weather system and asked to charge devices and remain on standby in case of an event. Additional Comments for Q3: Alectra informed customers of imminent adverse weather conditions based on information from Environment Canada. The special weather statement and associated emergency preparedness and safety messages were communicated to customers via @alectranews social media channels X (formerly known as Twitter) and Facebook. The messages communicated to customers included information on reporting an outage through the Contact Centre by phone, website forms and web chat, as well as YouTube videos related to safety and emergency preparedness. Additionally, on March 27 a carousel banner was posted to Alectra Utilities website, linking customers to a webpage containing power outage preparedness guidance. On March 27 Alectra Utilities also issued a news release advising customers that the incoming storm may cause power outages and reminding customers to ensure emergency kits are ready. Additional Comments for Q4: Alectra Utilities has a Corporate Emergency Subplan for each of its operational areas. The Emergency Plan is based on the Incident Management System (“IMS”) and requires training exercises to be conducted on an annual basis. Each exercise is debriefed and critiqued. An After-Action report is prepared and made available to all staff participating in the exercise. Training of Alectra Utilities system controllers (and others, as required) is performed on an ongoing basis, and continual review of the Corporate Emergency Plan is completed annually. Beginning on March 29, 2025, a severe ice and freezing rainstorm resulted in broken tree branches and power interruptions in eastern and central Ontario. Supply to customers in Alectra’s Barrie and Penetanguishene service territories was significantly impacted. Richmond Hill, Vaughan, Markham, Thornton and Aurora were impacted to a lesser extent. Ice-build up on trees caused broken limbs and fallen trees, resulting in immense damage to overhead feeders. There were widespread outages of prolonged durations as roads were icy and inaccessible due to fallen trees and downed power lines. As the event lasted multiple days and sustained outages occurred throughout, damage assessment was an ongoing process. 42,124 customers (3.9% of Alectra Utilities’ customer base) experienced sustained outages due to adverse weather conditions on March 29, 2025. 47,177 customers (4.3% of Alectra Utilities’ customer base) experienced sustained outages due to adverse weather conditions on March 30, 2025. Supply to 90% of the affected customers on March 29, 2025, was restored within 37 hours and 31 minutes. Supply to 90% of the affected customers on March 30, 2025, was restored within 38 hours and 18 minutes. If the event is considered in its entirety, 90% of all impacted customers across both days were restored at 6:04 a.m. on March 31, which is 45 hours and 23 minutes after outages commenced. Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 89301 8.19999980926514 45 Yes No No further action is required at this time No Yes Yes N/A Alectra Utilities Corporation Alectra Utilities Corporation 2025 2025-06-02T13:34:56 2025-04-29T00:00:00 9:52 AM Yes Environment Canada issued weather alerts for most of southern Ontario as a cold front moving through the area was expected to trigger severe thunderstorms and strong winds on April 29, 2025. Additionally, a severe thunderstorm warning was issued from 5:30 p.m. to 7:00 p.m. In anticipation of the adverse weather event, on-call staff were made aware of the incoming weather system and asked to charge devices and remain available on standby in case of an event. Additional Comments for Q3: Alectra informed customers of imminent adverse weather conditions based on information from Environment Canada. The special weather statement and associated emergency preparedness and safety messages were communicated to customers via @alectranews social media channels X (formerly known as Twitter) and Facebook. The messages included information for customers on reporting an outage through the Contact Centre by phone, website forms and web chat, as well as outage updates, safety and emergency preparedness messages. Additional Comments for Q4: Alectra Utilities has a Corporate Emergency Subplan for each of its operational areas. The Emergency Plan is based on the Incident Management System (“IMS”) and requires training exercises to be conducted on an annual basis. Each exercise is debriefed and critiqued. An After-Action report is prepared and made available to all staff participating in the exercise. Training of Alectra Utilities system controllers (and others, as required) is performed on an ongoing basis, and continual review of the Corporate Emergency Plan is completed annually. The windstorm most significantly affected Alectra’s customers in Hamilton, Guelph and Rockwood. Other cities serviced by Alectra experienced minimal impact. The maximum wind gust experienced was up to 110 kilometers per hour in some areas. Strong winds resulted in fallen trees, downed power lines and damage to overhead equipment. Supply to 90% of the affected customers was restored within 12 hours and 2 minutes. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 25203 2.29999995231628 12 Yes No No further action is required at this time No Yes Yes n/a Canadian Niagara Power Inc. Canadian Niagara Power Inc. 2025 2025-05-29T08:32:33 2025-03-30T00:00:00 01:08 AM Yes Yes, Environment Canada issued a weather alert for the Gananoque area, warning of a prolonged period of freezing rain and significant ice accretion. The alert indicated that the weather would take effect from the evening of March 28th until the afternoon of March 30th. Yes, crews were put on standby prior to the beginning of the Major Event. In addition, two crews from another division of Canadian Niagara Power located in Fort Erie, arrived in the Gananoque area prior to the weather event to proactively assist the local crew. A contracted crew from a non-distributor organization was also on standby, ready to deploy if needed. An accumulation of approximately 27 mm of ice formed on power lines and branches, with wind gusts reaching up to 61 km/h on March 30th. Trees and branches fell onto our infrastructure, causing broken lines, arcing, and lockouts. For all the customers of Canadian Niagara Power: 6% For the division Eastern Ontario Power: 55% Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 2002 55 8 No No Others No Yes Yes Continuous process improvements are always a priority. Feedback from both our team and our customers is essential to enhancing our reliability. During and after the major event, we received numerous positive feedback from customers, which was reassuring a Centre Wellington Hydro Ltd. Centre Wellington Hydro Ltd. 2025 2025-09-17T09:11:33 2025-07-30T00:00:00 03:50 AM No Hydro One’s control room contacted Centre Wellington Hydro Ltd.’s Manager, Operations, by mobile phone on July 30, 2025, at 3:50 am to inform him that the Fergus M3 had tripped. This unplanned power outage was later determined to be caused by a piece of failed customer-owned equipment (Cause Code 9.4). Within 3 hours and 4 minutes, 3.04 hours, all customers had their power restored except the customer with the failed equipment. Others Yes, used IEEE Standard 1366 Yes 5346 70 3 No No No further action is required at this time No Discussions with Operations staff after the major outage continued and no alterations to current practices in addressing such outages are required. Elexicon Energy Inc. Elexicon Energy Inc. 2025 2025-01-31T14:09:40 2024-11-29T00:00:00 02:27 No Elexicon was aware of the potential for snow starting November 29, 2024 in the area but the weather report did not indicate a risk of any significant accumulation. The closure of Highway 11 from November 30th to Dec 3rd severely limited Elexicon Energy (Elexicon) and Hydro One Network Inc’s (HONI) ability to access the community. On November 29, 2024, a severe winter storm struck the Gravenhurst area, bringing heavy snowfall, strong winds, and blizzard conditions. The storm resulted in road closures (including Highway 11 for several days), abandoned vehicles, downed trees, accidents, and widespread power outages. In response to the crisis, the town of Gravenhurst declared a state of emergency. All of Elexicon’s Gravenhurst customers were interrupted during the major event as a result of the loss of supply. In total, there were 8,879 customer outages that may include more than one outage for some customers. Approximately 4% of Elexicon’s total customer base was interrupted, however 100% of Elexicon’s Gravenhurst customers were interrupted as a result of the loss of supply. The HONI supply to Elexicon’s power system in Gravenhurst locked-out at 08:08 on November 30th and was not returned to service until 21:57 the same day. Estimated time for restoration of 90% of customers was approximately 100 hours following loss of supply. Restoration was particularly complicated for several reasons. Firstly, travel to the site was impacted by the closure of the highway for several days. Alternate modes of transportation were required, including snowmobiles, to bring staff into the community. Secondly, access to many of the lines was hampered by the sheer volume of snowfall (4 to 5 feet), occasionally requiring snowshoes or drones to view equipment and assess the damage. In some instances, boats were required for water-access only sites. Adverse Weather-Snow Yes, used IEEE Standard 1366 Yes 6400 4 100 Yes No No further action is required at this time No Elexicon Energy Inc. Elexicon Energy Inc. 2025 2025-05-29T11:48:36 2025-03-29T00:00:00 02:36 am Yes Elexicon Energy received warning of the impending event on March 27, 2025 by way of an Environment Canada alert—Elexicon actively monitors Environment Canada weather warnings by way of its Integrated Operations Centre (IOC) daily weather monitoring. Additional verifications of the weather threat were done through Weather Sentry, Elexicon’s paid weather verification service. Elexicon held its preparatory storm meeting on March 27 to discuss storm arrangements and to put both Incident Management Team (IMT) and field resources on standby. This led to Elexicon conducting call-outs to field personnel and contractors to pre-stage additional field resources for the event as well as notifying internal staff of their activation to support the Storm IMT. On March 29, a powerful ice storm swept across Ontario, causing significant ice accumulation, widespread power outages, downed trees and hydro lines, and hazardous road conditions. The ice storm impacted the entire Elexicon Energy service territory, with the Town of Gravenhurst declaring a State of Emergency in response to the crisis. n/a Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 11042 6 25 Yes No No further action is required at this time No Yes Yes While the ice storm occurred over several days, only May 29, 2025 exceeded the customer hours threshold to be classified as a Major Event Day under IEEE Standard 1366. EPCOR Electricity Distribution Ontario Inc. EPCOR Electricity Distribution Ontario Inc. 2025 2025-05-16T09:53:10 2025-04-03T00:00:00 02:20 AM Yes In late March 2025, Ontario experienced a major ice storm, leading to widespread power outages and damage across the province including areas. The storm's impacts included downed trees and power lines, hazardous road conditions, and damage to infrastructure. EPCOR Electricity Distribution Ontario Inc. (“EEDO”) did have prior warning that the storm would occur and did anticipate impacts. Overall, EEDO’s distribution system fared well and staff responded to the challenging weather. EEDO has performed additional vegetation management in this area in an effort to mitigate against any unplanned outages. This additional work resulted in an increased tree to power line separation. Regarding the April 3 outage, EEDO had NO prior warning. The tree that fell was uprooted at the base due to a thunderstorm and high winds on April 3, and from the ground being saturated from the ice storm March 29-31. The base of the tree was approx. 12M from the power lines. EEDO considers this issue to be directly caused by the March ice storm EEDO ensured that all relevant operational staff were aware of the potential of the storm and canvassed the group to determine how many staff would be available if additional assistance was needed. There is one powerline technician on call regularly and for this event all nine powerline technicians worked over the course of the weekend (staggered where necessary) Further to question 1 in the previous section, on Saturday, March 29th to 31st the EEDO service territory experienced a major ice storm hit the area breaking limbs, falling trees, and weakening trees along with saturating the ground when the ice melted. Compounding this, on April 03 there were severe thunderstorms with high winds that blew a large tree over from the base (roots). Despite the base of the tree being located approximately 12 metres away from the major 44Kv feeder, the tree made contact resulted in a direct fault on the M3 44Kv circuit. Once the location of the issue was identified, crews worked to safely secure the work site (coordination of grounds and switches) – and were able to reenergize the circuit to restore power to customers. After this, they were able to safely move the branches and restore the system to normal. The IEEE Standard 1366 was used to identify the scope of this Major Event. Using historical outage data from 2019-2024, the calculated Major Event Day Threshold (TMED) was calculated to be 0.28. For the outage being submitted, the SAIDI value is calculated to be 2.08, which is significantly above that value. Excluding any loss of supply outages, 576 customers were affected from March 29 to 31 (3% of total customer base). The outage on April 03 affected 9,634 customers on April 03 (50% of total customer base). The outage took 2 hours and 40 minutes to restore 90% of customers. Yes, EEDO is part of the Ontario Mutual Assistance Group (OnMAG). OnMAG is a single point of contact for utilities to request & offer mutual assistance resources when damaging events occur within a member’s service territory Note: EEDO did not require mut Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 9634 50 3 Yes No System upgrades No Yes Yes EEDO was prepared and well positioned to manage this storm, given impacts province wide and will continue to ensure its outage response capability is as efficient as possible to restore customers as quickly as can be safely achieved. As included in its di ERTH Power Corporation ERTH Power Corporation 2025 2025-09-12T11:14:20 2025-07-24T00:00:00 7:08 PM Yes Environment Canada issued a severe thunderstorm warning prior to the event. A tornado warning was also issued immediately ahead of the event. On-Call staff were prepared and available while remaining crew members were briefed on the weather and the potential need for extra help and sent home. During the event, additional Powerline Technicians and Operations Management staff were called in to assist. The main cause of the outages during the Major Event was “6.2 – Equipment Breakage” due to adverse weather. Assistance was provided by Tillsonburg Hydro, Entegrus Powerlines, and J-Mar Line Maintenance Inc. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 2782 11 11 Yes Yes Process improvements No Yes No ERTH Power is in the process of increasing its capacity for fault detection to more quickly pinpoint the source of outages and reduce outage times. ERTH Power’s Operations department will review a procedure for debriefing meetings to discuss successes and Hydro One Networks Inc. Hydro One Networks Inc. 2025 2025-01-28T12:36:13 2024-11-29T00:00:00 12:14 AM Yes Central Region was watching the weather and planning for this event All teams worked on their resourcing plans and prepared to respond. Offroad equipment and helicopters were prepped, attention was drawn to road conditions and potential closures, fleet mechanics were put on call for the weekend in the area A severe snowstorm, referred to as 'Thundersnow,' brought heavy snowfall and strong winter wind gusts to central Ontario, causing extensive damage. In the Bracebridge area, snow accumulation ranged from 50 to 100 cm. The storm affected approximately 108,000 customers (7.2%) from November 29 to November 30, with restoration efforts continuing into December 1, 2, and 3. According to the IEEE 1366 methodology, November 29 and 30 were classified as Major Event Days. Approximately 7.2% of Hydro One’s customer based was interrupted during the event It took 66 hours and 39 minutes from the onset of the Major Event to restore 90% of interrupted customers Adverse Weather-Snow Yes, used IEEE Standard 1366 Yes 108000 7.19999980926514 66 Yes No No further action is required at this time No Yes Yes N/A Hydro One Networks Inc. Hydro One Networks Inc. 2025 2025-06-27T15:18:41 2025-03-29T00:00:00 12:01 AM Yes Control Room Operations closely monitored the development of a potential weather event that was expected to impact the Northeast, Eastern, and Central Regions over a 72-hour period, extending as far south as Kitchener-Waterloo by Sunday. Weather sources forecasted risks of heavy wet snow, freezing rain, and the potential for prolonged ice accumulation. Extra staff were arranged for the Control Room and Call Centre. Awareness meetings were held prior to the event, with canvassing of Lines, Forestry, Design Services and Field Business Centre staff availability/standby for the expected event duration. Forecasts did not provide enough certainty in terms of specific location, duration and accretion to make other staff location-specific arrangements preemptively. An extremely powerful and widespread ice storm swept across Ontario, from Georgian Bay area, through central regions including Muskoka, the Kawartha’s, and eastern areas such as Belleville and Kingston. In its second phase, the storm expanded to affect a broader swath of the province, including many parts of Southern Ontario. Heavy freezing rain accumulated on trees, with ice accumulation reaching 10–20 mm in some areas. This caused dramatic tree falls and damaged a significant portion of Hydro One Networks Inc.'s distribution assets. This devastating ice storm impacted ~1,133,000 customers—the equivalent of about 76% of HONI’s customer base—between March 29 and April 6. Restoration efforts continued through April 14, impacting an additional ~87,000 customers. The days from March 29 to April 6 qualified as Major Event Days based on the IEEE 1366 reliability methodology. This is the first Major Event in 2025. It took 182 hours and 53 minutes from the onset of the Major Event Alectra Utilities, Algoma Power, Bluewater Power, Burlington Hydro, Canadian Niagara Power (Fortis), Elexicon Energy, Enova Power, ENWIN Utilities, EPCOR, ERTH Power, ESSEX Powerlines, GrandBridge Energy, Greater Sudbury Hydro, Hydro Ottawa, London Hydro, Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 1133000 76 182 Yes Yes Training, Process improvements, System upgrades No Yes Yes A comprehensive internal After-Action Review is currently underway to drive improvements across processes, people, and technology. This review will enhance our operational procedures, strengthen team capabilities, and upgrade data systems to deliver more Hydro One Networks Inc. Hydro One Networks Inc. 2025 2025-07-29T18:50:06 2025-04-29T00:00:00 12:17 AM Yes The IBM Predication Software and Weather Monitoring tool indicated the potential for a significant event A Significant Event Notification was issued for potential severe weather, and three planning calls were held 24 hours in advance of the impact. All responding teams canvassed resources and planned their response, which resulted in the timely and efficient establishment of Local and Regional Area Command Centres on April 29th A severe thunderstorm moved across the southeasternmost regions of northeastern Ontario into southern and eastern Ontario. The storm brought wind gusts exceeding 100 km/h, accompanied by large hail, isolated tornadoes, and frequent lightning As a result, approximately 181,000 customers (or 12%) experienced service interruptions on April 29th. Restoration efforts continued into May 1, affecting an additional 66,000 customers (or 4%) April 29th has been classified as a Major Event Day in accordance with the IEEE 1366 methodology This is the second Major Event in 2025 It took 39 hours and 12 minutes from the onset of the Major Event The assisting utilities were Bluewater Power, Sudbury Hydro, ERTH Power, Kingston PUC, GrandBridge Energy, Orangeville Hydro, Centre Wellington Hydro, and SSM Power provided support through Ontario Mutal Assistance K-Line, Highline Utility Solutions, Vala Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 181000 12 39 Yes Yes Additional staff training and process improvements No Yes Yes Hydro One Networks Inc. Hydro One Networks Inc. 2025 2025-08-25T19:53:49 2025-06-21T00:00:00 12:04 AM No Although severe thunderstorms were forecasted, the intensity of the event was unexpected. It was later confirmed to be a downburst—a sudden and powerful wind phenomenon capable of causing damage comparable to a tornado A severe summer thunderstorm tracked from northwestern Ontario through northeastern, central, and eastern regions of the province. The storm brought frequent lightning, heavy rainfall, hail measuring 2–4 cm, and wind gusts ranging from 80 to 110 km/h. Between June 21 and June 22, approximately 168,000 customers (11%) were impacted. Restoration efforts continued through June 25, affecting an additional 97,000 customers (6%). Based on the IEEE 1366 methodology, June 21–22 qualifies as a Major Event Day. This is the third Major Event in 2025. Approximately 168,000 customers were impacted on June 21st and 22nd Approximately 11% of Hydro One’s customer base was interrupted during the event It took 50 hours from the onset of the Major Event North Bay Hydro (not through OnMag but is an OnMag member) Northern Ontario Wires Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 168000 11 50 Yes Yes No further action is required at this time No Hydro One Networks Inc. Hydro One Networks Inc. 2025 2025-09-22T09:13:19 2025-07-24T00:00:00 12:14 AM No A severe thunderstorm system moved from Northern Ontario into Georgian Bay, Central, East Central, and Western regions. The primary hazards included wind gusts of 90–110 km/h, frequent lightning, heavy rainfall, and hail measuring 1–3 cm. Moderate thunderstorms also affected the Greater Toronto Area, West Central, and Eastern regions. The storm impacted approximately 158,000 customers (10.5%) on July 24, with restoration efforts extending into July 28 and affecting an additional 117,000 customers (8%). Based on IEEE 1366 methodology, July 24 qualifies as a Major Event Day. Approximately 158,000 customers were impacted on July 24, 2025 Approximately 10.5% of Hydro One’s customer base was interrupted during the event It took 43 hours and 21 minutes from the onset of the Major Event Bluewater Power (OnMAG member) Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 158000 10.5 43 No Yes No further action is required at this time No Hydro Ottawa Limited Hydro Ottawa Limited 2025 2025-05-27T16:55:03 2025-03-27T00:00:00 02:31 AM No This event was triggered by a broken conductor on the Hydro One owned transmission circuit and subsequently, a Hydro Ottawa equipment failure. There was no prior warning that this event would occur. On March 27, 2025, starting at 02:31am, a downed conductor led to two Hydro One circuit trips (C7BM and S7M). Power was gradually restored throughout the morning. During restoration, at 07:36am, a blue phase insulator on the Hydro Ottawa Centrepointe T1 transformer failed. Centrepointe T1 was isolated allowing C7BM to be restored. All customers were back online at 9:26am. This represented 46,355 of the 51,601 customers restored by 07:19 am EDT, both through efforts by Hydro One and Hydro Ottawa to resupply stranded customers. Loss of Supply Yes, used IEEE Standard 1366 Yes 63978 17 5 Yes No Process improvements No Post Event Debrief and Switching Order Review with System Office Staff Completed. Hydro Ottawa's Stations Inspection Program Continuation to support the potential early identification of equipment at risk of failure. Hydro Ottawa Limited Hydro Ottawa Limited 2025 2025-06-24T11:25:12 2025-04-29T00:00:00 4:20 PM Yes Weather forecasts on Monday April 28th, 2025 indicated that there was a risk of scattered strong thunderstorms along with strong wind gusts of over 60 km/h forecasted for the Ottawa area for the afternoon of Tuesday April 29th, 2025. Additional control room operators and four extra emergency response field staff were brought in for the night shift on April 29th. The on-call team consisted of 6 powerline maintainers, 2 power cable technicians, and 2 substation electricians. Staff were placed on rest time for the day of Tuesday, April 29th. They were then directed to report to their work centers at 3:00 pm in order to stand by for the coming storm. A severe thunderstorm on April 29, 2025, resulted in widespread Hydro Ottawa outages affecting 40,337 customers. These outages were attributed to tree contacts, equipment damage, and two loss of supply events. Apart from the loss of supply events, four major outages occurred, with the largest—caused by a downed conductor—impacting 10,038 customers. Additionally, tree contact caused three feeder outages affecting 13,698 customers and two loss of supply outages affected 8,941 customers. N/A Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 40337 11 10 Yes No Process improvements No Yes Yes In an attempt to reduce the impact of Tree Contact Impact during Forecasted Outage Events of this type, Hydro Ottawa will ensure additional forestry resources are on standby. Hydro Ottawa Limited Hydro Ottawa Limited 2025 2025-08-21T09:13:32 2025-06-22T00:00:00 1:04 AM Yes Weather forecasts indicated that there was a risk of thunderstorms, strong wind gusts and heavy rainfall late on Saturday June 21st into the early morning of June 22nd. Preparations and monitoring of the impactful weather began on June 20th. Additional 24/7 and Field Operator crews were secured for the night shift (7 pm - 7 am) on Saturday June 21st. On June 22, 2025, a severe thunderstorm led to extensive Hydro Ottawa outages, impacting 31,125 customers. Adverse weather and subsequent tree contacts were the primary causes of interruptions, with three outage events that accounted for 64,705 customer-hours of interruption. 91% of the impacted customers were restored by 8:14 AM on June 22nd, which was 7 hours 10 minutes after the event began. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 31125 8 7 No No No further action is required at this time No Yes Yes N/A InnPower Corporation InnPower Corporation 2025 2025-05-08T11:35:34 2025-03-29T00:00:00 08:00 AM Yes InnPower was provided warning of adverse "Ice Storm" conditions via online weather alert services. This warning was provided on March 26. InnPower had a list of field crews and support staff who were available on standby. Severe freezing rain conditions that began on March 29, 2025 resulted in wide scale outages across InnPower's entire service territory. The majority of InnPower's system is overhead and much of this is in close proximity to trees. The extreme conditions caused many trees to fall into the lines, causing critical feeders to trip out. In addition there were several broken poles, insulators and conductors throughout the area. InnPower experienced a loss of supply as HONI also had wide scale outages. At one point every InnPower customer was out. Through a dedicated response effort including all internal and many external crews, power was restored to all customers by April 4, 2025. Wasaga, Enova, Orangeville Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 21200 89 56 Yes Yes Additional staff training No Yes No InnPower has conducted extensive storm debrief sessions and will continue doing so into the forseeable future. Many lessons were learned and several opportunities for improvement have been identified. These include updating the EPP (Emergency Preparedness Lakeland Power Distribution Ltd. Lakeland Power Distribution Ltd. 2025 2025-01-17T14:21:29 2024-11-29T00:00:00 5:20am Yes The amount of snow forecast may normally result in a few outages, however, the actual snowfall was more than double, resulting in a major event and a "state of emergency" in parts of Muskoka. LPDL arranged with staff, ONMag, Sudbury Hydro, and tree removal contractors. Significant snow storm, resulting in 120cm+ of snow over two days. Outages were mainly due to the heavy snow sticking to trees and causing branches to sag or break. Significant delays in restoration times were due to inaccessibility on rural roads, and road closures (including Highway 11, which prevented vehicles from reaching Bracebridge for several days, resulting in gas stations running out of gas). Loss of Supply from Hydro One was the largest contributing factor. Loss of Supply did not occur at the same time as the major event; it was sporadic depending on the municipality serviced. Greater Sudbury Hydro Loss of Supply Yes, used IEEE Standard 1366 Yes 9984 67 7 Yes Yes Others No Yes Yes Lakeland will conduct a vegetation assessment of highest-risk and most densely trees areas. Lakeland is a member of OnMAG and participate in quarterly meetings to discuss future storm assistance. Lakeland Power Distribution Ltd. Lakeland Power Distribution Ltd. 2025 2025-05-14T13:17:11 2025-03-29T00:00:00 1:02 AM Yes Yes, Lakeland monitored weather forecasts, and received information from ONMAG. Lakeland kept staff informed and asked that staff be available. On March 29th, Lakeland activated ONMAG, but received no assistance as utilities were unsure whether they would be affected. A devastating ice storm swept through our service territory on March 29th and March 30th. Lakeland suffered 44 broken poles and countless spans of broken wire. Customers of Lakeland experienced damaged equipment, mostly bent or broken masts and broken customer-owned poles. Burlington Hydro Inc., Enova Power Group, Oakville Hydro, North Bay Hydro Distribution Ltd. were utilized through ONMag. In addition, K-Line Maintenance and Construction was brought in for additional support. Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 8967 60 127 Yes Yes Others Yes Yes Yes Lakeland has participated in forming a committee involving municipalities, other utilities, emergency services, Ontario Corp, and Bell Canada. The group aims to communicate effectively and improve our emergency coordination. London Hydro Inc. London Hydro Inc. 2025 2025-02-19T11:14:52 2024-12-27T00:00:00 8:54 PM No N/A On Monday December 27, 2024 at 8:54 pm, during dark and poor rainy weather conditions, a vehicle swerved into the oncoming traffic, causing a multiple vehicular accident, and then struck and broke a hydro pole. The pole was installed far away from the curb, behind a sidewalk, exceeding minimum clearance requirements. This caused an outage to 7,374 customers across two main feeders as this pole location carried two feeders. Using automated devices, nearly 50% of customers were restored within ten minutes, and the next 20% of customers restored in 1.5 hours after reports were received of the accident location. Due to the location of the incident, a temporary switch was required to be installed to safely isolate the accident location, make the necessary repairs, and restore power to the remaining groups of customers. OEB Cause Code; Foreign Interference – Vehicle Accident The major event started at 8:54pm on December 27th, and over 90% of customers were restored by 2:42am on December 28th. Others Yes, used IEEE Standard 1366 Yes 7374 4.30000019073486 6 No No Others No For the specific accident location, the temporary sectionalizing switch was left permanently to provide switching capabilities to aid in the restoration of any future outages in the area. This ‘foreign interference – vehicle accident’ could have potential London Hydro Inc. London Hydro Inc. 2025 2025-03-19T09:17:33 2025-02-11T00:00:00 7:16 AM No N/A On Tuesday February 11th, 2025 at 7:16am a Hydro One Transmission Loss of Supply event occurred affecting the 230-kV W36 circuit supplying Talbot T3/T4 Station Q1&Q2 and J1&J2 Bus. Reports from Hydro One indicated that the cause of the outage was due to a downed sky wire that made contact to the transmission line. This interrupted a total of 95MW of London Hydro load that was interrupted, impacting a total of 33,532 customers. Using London Hydro distribution ties, 45% of customers were restored within 35 minutes and the remaining customers were restored within 68 minutes after Hydro One’s 230-kV supply to Talbot’s T3 was restored. Under normal circumstances, a single transmission circuit loss of supply event on a Dual Element Spot Network Transformer Station does not result in an interruption to customers. However, at the time of this incident, the Talbot T3/T4 Transformer Station which is normally supplied by W36 and W37 transmission lines, was in an abnormal configuration due to a Hydro One scheduled maintenance that had the T4 transformer (supplied by W37) out of service. The unplanned outage of the W36 transmission circuit resulted in a loss of supply to the T3 transformer that was in-service which affected customers supplied by the Talbot T3/T4 Station. The anticipated date for the completion of the maintenance is March 7, 2025, at which point it is expected that both supplies will be available at Talbot Station. The major event started at 7:16am on February 11th, and over 90% of customers were restored by 8:24am. Loss of Supply Yes, used IEEE Standard 1366 Yes 33532 19.8999996185303 1 Yes No Others No After the incident occurred, London Hydro engaged Hydro One to provide details on (1) the root cause of the outage, (2) all equipment failures that were encountered, and (3) any remediation plans that are in place. The root cause of the outage was due to London Hydro Inc. London Hydro Inc. 2025 2025-04-28T16:10:37 2025-03-08T00:00:00 11:32 AM No On Saturday March 8th, 2025 at 11:32 am a Hydro One Transmission Loss of Supply event occurred, affecting the Talbot T3/T4 Station Q1&Q2 and J1&J2 Bus, and the Talbot T1/T2 Station BY Bus. At the time of this incident, the Talbot T3/T4 Transformer Station which is normally supplied by W36 and W37 transmission lines, was in an abnormal configuration due to Hydro One scheduled maintenance that had the T4 transformer (supplied by W37) out of service. Hydro One was performing switching to bring the T4 transformer back into service after completion of the scheduled maintenance. During switching, the drive mechanism for the T3-A transformer disconnect switch failed to operate correctly, which led to single phasing at the T3 transformer. Hydro One had to take the Talbot 230kV A Bus out of service to resolve the single phasing to customers, and isolate the T3-A transformer disconnect switch for future repairs. As per designed configuration, the operation of the Talbot 230kV A Bus breaker, which impacted the supply to Talbot T3 Station, also removes supply for the Talbot T1 Station. This impacted a total of 68,018 customers for 22 minutes. The major event started at 11:32 am on March 8th, and all customers were restored by 11:54 am. Loss of Supply Yes, used IEEE Standard 1366 Yes 68018 40.2999992370605 1 Yes No Others No After the incident occurred, London Hydro engaged Hydro One to provide details on (1) the root cause of the outage, (2) all equipment failures that were encountered, and (3) any remediation plans that are in place. The root cause of the outage was due to London Hydro Inc. London Hydro Inc. 2025 2025-06-24T15:54:56 2025-04-29T00:00:00 4:26 PM Yes Environment Canada issued a severe thunderstorm warning for the London area. London Hydro did have extra London Hydro employees on duty during the storm. London Hydro did bring in additional contractors to assist in restoration activities during the storm. A severe thunderstorm accompanied by strong wind gusts, lightning, hail and heavy rain passed through London Hydro’s distribution area on April 29th around 4:30 pm. The resulting high wind from the storm knocked down trees throughout the region, that damaged various hydro poles and power lines, and also caused other equipment breakage throughout the distribution system. The following OEB cause codes were used to classify this Major Event Day: Adverse Weather - Tree Contact Weather, Adverse Weather - Equipment Breakage, and Adverse Weather - Extreme Wind. The major event started at 4:26pm on April 29th, and over 90% of customers were restored by 12:07am on April 30th. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 23949 14 8 No No Others No Yes Yes London Hydro has an Emergency Procedures Plan; training and mockups are performed annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of extensive damage to London Hydro London Hydro Inc. London Hydro Inc. 2025 2025-08-21T11:28:03 2025-06-24T00:00:00 6:12 PM Yes Environment Canada issued a severe thunderstorm warning for the London area. London Hydro had all employees available to assist and external contractors available if needed during the event. A severe thunderstorm accompanied by rain, lightning and high winds, caused trees to be brought down onto power lines in London Hydro’s distribution area on June 24th around 5:00 pm. The following OEB cause codes were used to classify this Major Event Day: Adverse Weather - Tree Contact Weather, and Lightning – Lightning. The major event started at 6:12 pm on June 24th, and over 90% of customers were restored at 12:19 am on June 25th. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 10735 6.30000019073486 6 No No Others No Yes Yes London Hydro has an Emergency Procedures Plan; training and mockups are performed annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of extensive damage to London Hydro London Hydro Inc. London Hydro Inc. 2025 2025-10-08T15:46:27 2025-08-10T00:00:00 1:00 PM No On Sunday August 10th at 12:31 PM, a fault on a London Hydro distribution feeder and Hydro One Transmission Loss of supply event on the Talbot TS Q2 Bus occurred. This outage impacted 16,765 customers. The outage was initially triggered by an issue on the distribution feeder. However, a significant portion of this outage was due to Loss of Supply as the Q2 Bus was not available for restoring load. The major event started at 1:00 pm on August 10th, and over 90% of customers were restored at 4:58 PM. Loss of Supply Yes, used IEEE Standard 1366 Yes 16765 9.89999961853027 4 Yes No Others No After the incident occurred, London Hydro engaged Hydro One to provide details on (1) the root cause of the outage, (2) all equipment failures that were encountered, and (3) any remediation plans that are in place. Follow-up discussions with Hydro One are Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2025 2025-03-20T16:14:09 2024-04-12T00:00:00 07:21 PM No A significant windstorm passed through Ontario, leading to widespread power outages and disruptions across the province. Starting on April 12, strong winds, particularly in areas near Lake Huron and Georgian Bay, caused trees and branches to fall onto power lines. This Major Event Day involved four outages across NT Power’s service areas. The first incident occurred on the evening of April 12, 2024, when strong winds significantly impacted the Georgian Bay area, causing several tree contacts on the distribution system in Tay Township. These incidents included an outage in the Port McNicoll area, which cause the station fuses to operate, affecting 1,763 customers. This was followed by two additional smaller tree contact outages in the Waubaushene and Victoria Harbour areas, affecting 130 and 267 customers respectively. Lastly, the windstorm also caused the failure of an overhead line tap in the Newmarket area, affecting 2,279 customers during the repair efforts. Since the outages occurred in different service areas, there are two restoration times. The three outages in the Tay service area affected 2,160 customers, with 90% of customers restored within 5.55 hours. The final outage, impacting 267 customers, was fully resolved by 1:26 AM. Additionally, the separate outage in the Newmarket service area affected 2,279 customers, with 90% of customers restored within 4.83 hours. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 4439 9.80000019073486 6 No No No further action is required at this time No Major Event was due to adverse weather conditions, therefore no further action is required by NT Power at this time. Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2025 2025-03-20T16:22:33 2024-06-13T00:00:00 07:34 PM No Multiple rounds of severe thunderstorms across Ontario and Quebec bringing damaging winds, heavy rain, frequent lightning and large hail. Loss of Supply and Adverse Weather-Wind. In the evening of June 13, 2024, two 44kV feeders out of Hydro One’s Waubaushene Transformer Station were locked out, and the outage began at 7:34 PM. Hydro One successfully reclosed the Waubaushene 98M2 feeder, which is dedicated to NT Power, but was unable to restore the 98M6 feeder, a shared feeder between Hydro One and Alectra. It was later determined that a large tree had fallen on the Hydro One-owned primary lines. After the tree was removed, power was fully restored at 10:40 PM. Feeder 98M2 initially experienced a brief outage of 2 minutes but was successfully reclosed before being taken offline again at Hydro One’s request to facilitate tree removal and repairs. The total outage duration for this feeder was 37 minutes, affecting 2,741 customers. Nearly half of the affected customers during this event were supplied by feeder 98M6, which remained out of service for approximately 3.08 hours. Loss of Supply Yes, used IEEE Standard 1366 Yes 6348 14.1000003814697 3 Yes No No further action is required at this time No Major Event was due to adverse weather conditions, therefore no further action is required by NT Power at this time. Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2025 2025-03-20T16:26:57 2024-07-10T00:00:00 2:03 PM No The remnants of Hurricane Beryl passed through Ontario as a post-tropical storm, bringing heavy rainfall, strong winds, and the potential for flooding, affecting southern Ontario. The storm's remnants persisted over the region until July 10, 2024, causing significant weather disruptions. On the afternoon of July 10, 2024, the 44kV feeders 98M2 and 98M4 from Hydro One’s Waubaushene Transformer Station, dedicated to NT Power, experienced two outages during the storm. The first outage occurred at 2:03 PM when a broken tree branch fell onto the overhead primary line, making contact with both the 98M2 and 98M4 feeders. For personnel safety, both feeders were de-energized to facilitate the removal of the tree branch. Power was fully restored at 5:47 PM. The second outage occurred four minutes later due to another tree branch intermittently contacting feeder 98M4 in Midland as a result of gusty winds. Given the limited capabilities and equipment available, Ontario Line Clearing was called in to remove the tree. In the meantime, NT Power crews continued patrolling the feeder to prevent a third outage. Power on feeder 98M4 was restored at 5:33 PM. During the first outage, all customers supplied by feeders 98M4 and 98M2 were affected, even though the broken tree branch initially fell onto feeder 98M4. Feeder 98M2 was later requested to be de-energized for tree removal upon the discovery of the broken tree branch. Both feeders were restored within 1.75 hours. During the second outage, feeder 98M4 was fully impacted and was restored within 1.55 hours. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 5257 11.6999998092651 2 No No No further action is required at this time No Major Event was due to adverse weather conditions, therefore no further action is required by NT Power at this time. Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2025 2025-05-28T10:23:40 2025-03-29T00:00:00 04:05 PM Yes Environment Canada and The Weather Network issued warnings early on the morning of Friday, March 28, 2025, forecasting a long-duration ice storm expected to persist from Friday through Monday March 31, 2025. The storm was anticipated to result in significant ice accumulation, leading to hazardous conditions, including dangerously slippery roadways and increased strain on power lines due to the weight of the ice, potentially causing major disruptions. NT Power had a full complement of standby staff and extra staff who could be called out to respond to possible power outages. Contributing Causes: Loss of Supply and Adverse Weather - Freezing Rain/Ice Storm During this Major Event Day, six of the seven reported outages occurred within our Midland-Tay service area, with Tay Township being one of the hardest-hit regions in Central Ontario. The outages began on the afternoon of March 29, 2025, with the first incident reported at 4:05 PM. As the storm intensified, multiple upstream 44kV feeders supplying NT Power’s distribution stations in the Midland-Tay area locked out due to downed trees making contact with overhead lines. This resulted in a sustained loss of supply to the region and widespread outages, as the majority of NT Power’s distribution system is overhead. While all Hydro One supplied 44kV station feeders were restored by 1:44 PM on March 31, 2025, considerable time was still required to complete restoration of 8.32kV and 4.16kV distribution feeders and radial and secondary distribution lines. Full restoration for the final group of affected customers was completed by April 4, 2025, at 8:42 PM through the coordinated efforts of internal crews. 100% of affected customers were restored within 148.62 hours. The significant difference between the time required to restore 90% of customers and full restoration is primarily due to the extensive work involved in repairing radial and secondary lines following the restoration of station feeders. These efforts were considerably delayed by the challenging conditions and widespread damage caused by the impacts of the ice storm. Loss of Supply Yes, used IEEE Standard 1366 Yes 11831 26.2000007629395 50 Yes No Process improvements No Yes Yes NT Power has carried out comprehensive storm debrief sessions and will continue to do so for the foreseeable future. These reviews have yielded valuable insights and revealed several opportunities for improvement. Among the key initiatives identified is t Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2025 2025-06-17T11:38:34 2025-06-04T00:00:00 05:50 PM Yes Environment Canada issued a forecast for June 4, 2025, indicating a moderate risk of thunderstorms, with expected wind gusts reaching 90 km/h, the potential for hail, and up to 50 mm of rainfall, which could lead to localized flooding NT Power had a full complement of standby staff and extra staff who could be called out to respond to possible power outages Contributing cause: Loss of Supply and Adverse Weather- Wind On the afternoon of June 4, 2025, Newmarket experienced a severe thunderstorm. Strong winds brought down tree branches, which came into contact with overhead lines, resulting in feeder lockouts. At 5:50 PM, the Newmarket service area experienced a loss of supply due to a 44kV feeder lockout. Shortly thereafter, a distribution feeder also locked out as the storm moved through the area. Following debris removal and restoration efforts, power was fully restored to all affected customers by 9:42 PM. 100% of affected customers were restored within 3.87 hours. Loss of Supply Yes, used IEEE Standard 1366 Yes 7739 17.1000003814697 3 Yes No No further action is required at this time No Yes No Major Event was due to adverse weather conditions; therefore, no further action is required by NT Power at this time Niagara-on-the-Lake Hydro Inc. Niagara-on-the-Lake Hydro Inc. 2025 2025-04-14T10:57:19 2023-07-20T00:00:00 06:54 PM No N/A A lightning strike felled a tree across a primary line during a major storm. The tree remained on the line so the full feeder could not be energized. The location was also one that could not be sectionalized. The on-call staff and the Operations Supervisor removed the tree. Using IEEE Standard 1366 the SAIDA was 17.79 minutes versus a threshold of 15.07 minutes based on the five years to the end of 2022. Lightning Yes, used IEEE Standard 1366 Yes 1 18.5 2 No No Process improvements No The budget for tree trimming has been increased significantly as the length of the outage was due to the tree falling on the primary M1 feeder line during the storm and staying on the line. This prevented the entire line from being reclosed. The tree fall Niagara-on-the-Lake Hydro Inc. Niagara-on-the-Lake Hydro Inc. 2025 2025-04-14T11:07:14 2024-06-13T00:00:00 01:10 PM No N/A This would not have been a major event if not for an unrelated loss of supply and the double peak transmission rules. To accommodate a Hydro One repair on its transmission line an outage was needed at the NOTL Station. To avoid double peak transmission billing the NOTL Station was taken down for the month with the entire load put on York Station. The outage occurred when one of the main feeder cables leading out from York Station failed. Using IEEE Standard 1366 the SAIDA was 36.07 minutes versus a threshold of 12.30 minutes based on the five years to the end of 2023. Others Yes, used IEEE Standard 1366 Yes 4 45 1 Yes No System upgrades No All three feeder cables coming out of York Station are being replaced. NOTL Hydro is participating in EB-2022-0325 to try get the double peak transmission billing changed so that situations like this do not rise again. Niagara-on-the-Lake Hydro Inc. Niagara-on-the-Lake Hydro Inc. 2025 2025-04-14T11:26:52 2024-07-16T00:00:00 01:23 PM No Loss of supply On July 16, 2024, Hydro One took the Q11S offline due to gas alarms at one of their transformers. The Q11S feeds the NOTL Hydro NOTL Station. NOTL Hydro transferred the affected load to its York Station. The Hydro One outage lasted around 2 1/2 hours. Once service was restored, NOTL Hydro transferred the affected load back to its NOTL Station. NOTL Hydro estimates the double transmission billing to be $147k or $15 per customer. Explaining to our customers that they will be charged more because Hydro One had an outage remains a challenge. Using IEEE Standard 1366 the SAIDA was 32.50 minutes versus a threshold of 12.30 minutes based on the five years to the end of 2023. The outage would have been much longer if NOTL Hydro had not switched the supply of these customers to the York Station. Loss of Supply Yes, used IEEE Standard 1366 Yes 7 7 1 Yes No Others No The outage time was longer than it could have been if the double peak transmission rules were fixed. The loss of supply was due to gas alarms at one of the Hydro One transformers on the Q11S transmission line. When this happens, NOTL Hydro must decide whe Niagara-on-the-Lake Hydro Inc. Niagara-on-the-Lake Hydro Inc. 2025 2025-04-14T11:34:43 2024-10-28T00:00:00 09:25 PM No Loss of supply Loss of supply on the Q11S. Twenty minute outage. Due to the short time frame no additional steps were taken. Using IEEE Standard 1366 the SAIDA was 14.42 minutes versus a threshold of 12.30 minutes based on the five years to the end of 2023. Loss of Supply Yes, used IEEE Standard 1366 Yes 7 72 0 Yes No Others No The loss of supply was on the Q11S transmission line. When this happens, NOTL Hydro must decide whether to switch the entire load to their York Station and incur costs to their customers of up to $200k or to see if the outage will be short. Fixing the dou North Bay Hydro Services Inc. North Bay Hydro Services Inc. 2025 2025-10-07T16:58:04 2025-09-05T00:00:00 1:25 PM No On September 5, 2025, the North Bay region experienced unusually high winds in the afternoon and evening, resulting in many power outages across the entire service area. North Bay Hydro crews confirmed that the issues originated from the high winds knocking down trees into the sub-transmission and distribution lines, causing broken conductors, crossarms and feeder breakers to trip with trees resting on the lines. This windstorm affected a total of 5,442 customers, and restoration efforts were an immediate response from North Bay Hydro. o Extremely high winds started coming through the North Bay area in the early afternoon causing lots of trees to come down. o North Bay Hydro prioritized safety during this time and made sure crews were dispatched first to broken conductor calls from the public / where emergency responders were dispatched and then focusing on the larger M class feeders. o At 1:25 p.m., approximately 200 customers on the 11F1 lost power due to many trees on the line. These customers were restored in the early morning hours after sectionalizing this feeder into four parts and clearing trees off the lines. o At 1:30 p.m., approximately 200 customers on the 17F2 lost power due to a tree on the line, which was restored by 3:18 p.m. o At 2:19 p.m., approximately 384 customers on the 14F1 lost power due to a tree breaking the conductors. This feeder was sectionalized by 3:00 p.m., and the rest of the customers were restored at 10:05 p.m. after the conductor was fixed. o At 3:30 p.m., the rest of the customers on the 11F1 were out of power due to trees on the line closer to the station. The trees were cleared and restored by 6:33 p.m. o At 3:27 p.m., approximately 4010 customers being fed from the 15M2 lost power. Crews patrolled the lines but didn’t find anything. They decided to isolate the Commanda DS (not NBH-owned) with the 44-217LB. After communicating with Hydro One to close the 15M2, all customers were restored at 5:40 p.m. o At 5:29 p.m., all customers on the 10F3 lost power due to a tree hitting the line. All customers were restored by 6:12 p.m. o At 6:29 p.m., approximately 113 customers on the 16F1 lost power due to a tree on the line. This feeder was sectionalized by 7:05 p.m., and the rest of the customers were restored at 7:21 p.m. after the tree was cleared off the line. 2.22 hours for 4010 customers - Approx. 3 hours for 90% of customers Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 5442 19.3999996185303 2 No No No further action is required at this time No Orangeville Hydro Limited Orangeville Hydro Limited 2025 2025-04-16T15:07:08 2025-03-29T00:00:00 8:58pm Yes Environment Canada warned of a significant ice storm set to hit Central Ontario. On-call staff and contractors were available. On March 29th & 30th, 2025, a high impact freezing rain & ice storm swept across Central Ontario. The storm caused ice accumulation on trees and powerlines. The ice also caused hazardous conditions on roadways and pathways. The storm affected a total of ~3,835 of Orangeville Hydro’s customers. The main contributing cause of the Major Event was freezing rain accumulation causing tree branches to break and contact overhead powerline and damage distribution infrastructure. Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 3835 29 6 Yes No Additional staff training No Yes Yes Investigating maintenance program improvements, and system upgrades are examples of actions that are being taken. Storm debriefings occurred at following Board meetings, management discussions, and operational meetings. Ottawa River Power Corporation Ottawa River Power Corporation 2025 2025-12-04T14:08:17 2025-10-19T00:00:00 08:32 PM No High winds were forecast for southern Ontario, but no weather warnings or forecasts relating to high winds/gusts were issued for our region. ORPC's Pembroke territory experienced a loss of supply on October 19th at approximately 8:32pm and supply was note restored until November 20th 4:32am. The outage was caused by a tree on the M1 & M2 supply lines owned by Hydro One from their Pembroke TS. Supply was restored at 4:58am. All customer in Pembroke were restored at this time. Loss of Supply Yes, used IEEE Standard 1366 Yes 7514 63 8 Yes No No further action is required at this time No As this was a loss of supply event, no preparation or mitigation could prevent these issues. Synergy North Corporation Synergy North Corporation 2025 2025-09-11T11:16:07 2025-07-27T00:00:00 11:27 AM No No. The only indication that the utility staff had of an event occurring was when Environment Canada issued a Severe Thunderstorm Warning for the city within the half hour prior to the event. On Sunday July 27, 2025 at 11:27 a severe thunderstorm occurred, briefly producing severe winds and rain. The severe winds downed trees onto energized distribution lines causing several downed lines and causing protective devices to lockout or fuses to operate. Most damage occurred in the northwest rural section of the Thunder Bay service area. Outage information including a visual map of outage boundaries, cause, status of repair, and ETOR (estimated time of restoration) was posted on our outage web site within 30 minutes of becoming aware of an outage. This outage information was updated as new information became available or otherwise reviewed and updated at least hourly throughout the major event. Outage information was also posted on social media (Facebook and Twitter) throughout the major event, and updated when there were significant changes to status of outages. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 2645 4.59999990463257 12 No No Additional staff training No A lessons learned meeting was held with management staff involved in the event and a decision was made to train additional internal staff in site assessment in order to dedicate PLT staff to restoration verses assessment and thus improve restoration times Synergy North Corporation Synergy North Corporation 2025 2025-09-11T11:20:30 2025-08-09T00:00:00 08:28 AM No 6.1 – Adverse Weather – Tree Contact Weather On Saturday August 9, 2025 at 08:28 a severe thunderstorm occurred, briefly producing severe winds and rain. The severe winds downed trees onto energized distribution lines causing several downed lines and causing protective devices to lockout or fuses to operate. Most damage occurred along a N-S strip through the middle of the urban Thunder Bay service area. 90% of 5504 customer = 4953 customers 5213 customers were restored by 18:03 08:28 to 18:03 = 9h35m Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 5504 9.60000038146973 10 No No Process improvements No This storm occurred on a Saturday in the peak of summer vacation. Not being able to prepare for this storm, and with no weather warnings being issued on Friday for the weekend, meant that we had to react in the moment, with both contractor and internal re Toronto Hydro-Electric System Limited Toronto Hydro-Electric System Limited 2025 2025-06-27T13:53:52 2025-04-29T00:00:00 2:29 PM Yes Toronto Hydro actively monitors weather conditions from multiple credible external sources, including the Provincial Emergency Operations Centre, Environment Canada and The Weather Company. In this particular instance, an advisory was issued indicating the potential for adverse weather, with a 20% probability chance of wind gusts reaching speeds of 80 to 90 km/h. On April 28, 2025, Toronto Hydro made the necessary arrangements and proactively engaged internal and external crews to be prepared to divert from their normal routine to assist on emergency storm duties. This included activating parts of our Emergency Command Structure and preparation of additional operational support staff. This Major Event was initiated by a cause code 5 Adverse Weather event. On April 29, 2025, The City of Toronto experienced an abnormally high wind speed weather event beginning around 2:29 pm and continuing for several hours. Toronto Weather stations recorded maximum wind speeds of 103 km/h which included many large gusts of wind and was accompanied by sporadic heavy rain and thunderstorms. This resulted in significant damage to Toronto Hydro’s equipment, particularly in the North York and Scarborough regions of Toronto. Cause codes 5.1 Tree Contact Weather, 5.2 Equipment Breakage, and 5.3 Other were all witnessed in outages across the city. Restorations to damaged equipment and tree removal began immediately and the weather cleared up around 7 pm on April 29, 2025. No additional comments Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 55077 7 14 No No No further action is required at this time No Yes Yes Toronto Hydro's Disaster Preparedness Management program prepares the company to respond to a wide-range of large-scale emergencies. Its goal is to increase the company's ability to safely, effectively, and efficiently respond to large-scale emergencies. Wasaga Distribution Inc. Wasaga Distribution Inc. 2025 2025-05-27T14:40:10 2025-03-29T00:00:00 17:00 PM Yes Yes, the distributor did have prior warnings (special weather statements) that the Major Event could occur. WDI’s line staff were on stand-by, they stocked and fueled the trucks in preparation for the major event. The root cause of the interruptions was identified at Cause Code 6: Adverse Weather. However, some outages were caused by cause code 2: Loss of Supply. It took 8 hours and 50 minutes to restore power to more than 90 percent of its customers. Adverse Weather-Snow Yes, used IEEE Standard 1366 Yes 15714 100 9 Yes No Others No Yes Yes WDI has: • Debriefed staff to discuss lessoned learned • Confirmed the existing maintenance and capital programs that assisted in minimizing the customers interrupted during the Major Event. Wellington North Power Inc. Wellington North Power Inc. 2025 2025-06-02T13:06:38 2025-05-01T00:00:00 1:29 PM No Wellington North Power Inc. did not have prior warning that the Major Event would occur. The cause of interruption was: Cause Code 2: Loss of Supply A broken wire on Wellington North Power Inc.’s (WNP) 44kV Primary Metering Equipment (PME) resulted in partial power to the town of Arthur. WNP is an embedded distributor; Hydro One is the host distributor. Hydro One had to de-energize the 44 kV supply feed to allow WNP crews to safely make repairs to the PME equipment. Consequently, there was a Loss of Supply. During the outage, all of Arthur was without power and WNP crews made equipment repairs. Once repairs were completed, Hydro One re-energized the 44 kV supply therefore restoring power to the town of Arthur. For 90% of customers, the power was restored to Arthur at 3:55 pm on May 1, 2025. Outage was 2.43 hours (146 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 1478 33 2 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Hydro One Integrated System Operating Centre (ISOC). Wellington North Power Inc. Wellington North Power Inc. 2025 2025-10-29T08:55:15 2025-10-18T00:00:00 12:48 AM No The cause of interruption was: Cause Code 2: Loss of Supply A motor vehicle accident (MVA) resulted in a damaged Hydro One Inc. (HONI) transmission pole causing outage at HONI's Neustadt DS and Holstein DS resulting in a Loss of Supply to the 44kV that feeds Wellington North Power Inc. (WNP) affecting the LDC’s service areas of Mount Forest and Holstein. WNP is an embedded distributor; Hydro One is the host distributor. Due to the Loss of Supply, WNP’s substations MS3 and MS4 were without power. HONI and WNP crews performed line-switching to restore the 44kV supply to WNP. For 90% of customers, the power was restored at 4:12 am on October 18, 2025. Outage was 3.40 hours (204 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 1049 23 3 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Hydro One Integrated System Operating Centre (ISOC). Alectra Utilities Corporation Alectra Utilities Corporation 2024 2024-04-23T09:05:55 2024-02-28T00:00:00 3:12 PM Yes Weather alerts were provided by the media warning of abnormal weather conditions for Ontario including strong winds and rainfall. In anticipation of the adverse weather event, additional staff were made available on February 28, 2024. Additionally, Alectra’s Communications team regularly prepares for emergency situations. Full staff complements from the Communications and Government Relations teams were made aware of the incoming weather system and were asked to charge devices and remain on standby in the case of an event. Additional Comments for Q3: Alectra informed customers of imminent adverse weather conditions based on information from Environment Canada. The special weather statement and associated emergency preparedness messages were communicated to customers via social media channels X (formerly known as Twitter), Facebook and Instagram. The messages included emergency preparedness information from Alectra’s website and YouTube videos illustrating important safety messages. Additional Comments for Q4: Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its operational areas. The Emergency Plan is based on the Incident Management System (“IMS”) and requires training exercises to be conducted on an annual basis. Each exercise must be debriefed and critiqued, and a brief written summary of the debriefing is distributed to all staff participating in the exercise. Training of Alectra Utilities system controllers (and others, as required) is performed on an ongoing basis, and continual review of the Emergency Plan is completed. The supply to 5,240 customers from the towns of Beeton and Tottenham was affected when the Everett TS 138M8 44kV feeder breaker locked out on February 28, 2024, at 3:12 p.m. Alectra crews observed an uprooted customer owned tree on the overhead circuits at the rear of Eastern Avenue, just north of Mill St MS. The Everett TS 138M8 44kV feeder, the Nolan Rd MS834-F1 and the Mill St MS835-F3 8.32 kV feeders traverse the rear of Eastern Avenue along the CN Railway. At the time of the outage, Tottenham was experiencing 65-70 km per hour maximum wind gusts. A high amount of precipitation on February 27 and 28 totaling 16 mm would have been a contributing factor to the uprooted customer owned tree, coupled with strong winds. 5,240 customers (sustained outages only) were interrupted during the Major Event. An additional 1,995 customers were interrupted during system restoration for 6 minutes. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 5240 0 13 No No System upgrades No Yes Yes The Everett TS 138M8 44 kV feeder is susceptible to loss of supply and fallen trees. To reduce the outage impact, five (5) 44 kV remote operated switches, one automated switchgear, two (2) 13.8 kV remote operated switches and construction of 1km of 44 kV Alectra Utilities Corporation Alectra Utilities Corporation 2024 2024-10-10T13:53:27 2024-08-17T00:00:00 10:27 AM Yes Weather alerts were provided by Environment Canada and other media sources warning of severe weather conditions, including thunderstorms and flooding in association with Tropical Storm Ernesto. In anticipation of the adverse weather event, additional staff were made available on August 17, 2024. Additionally, Alectra’s Communications team regularly prepares for emergency situations. On-call staff from the Communications and Government Relations teams were made aware of the incoming weather system and asked to charge devices and remain on standby in case of an event. Additional Comments for Q3: Alectra informed customers of imminent adverse weather conditions based on information from Environment Canada. The special weather statement and associated emergency preparedness messages were communicated to customers via social media channels X (formerly known as Twitter) and Facebook. The messages included information for customers on reporting an outage through the Contact Centre by phone, website forms and web chat, as well as YouTube videos related to safety and emergency preparedness. Additional Comments for Q4: Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its operational areas. The Emergency Plan is based on the Incident Management System (“IMS”) and requires training exercises to be conducted on an annual basis. Each exercise must be debriefed and critiqued, and a brief written summary of the debriefing is distributed to all staff participating in the exercise. Training of Alectra Utilities system controllers (and others, as required) is performed on an ongoing basis, and continual review of the Emergency Plan is completed. On August 17, 2024, a severe thunderstorm resulted in flooding, road closures and widespread power outages across the Greater Toronto Area (GTA). Environment Canada reported a single-day record total rainfall of 128.3mm at Toronto Pearson International Airport. Flash floods occurred in multiple areas within the GTA, and a tornado touched down 90 km west of Mississauga in the community of Ayr. Supply to customers in Alectra’s Mississauga, Brampton, Guelph, Vaughan, Markham, Richmond Hill, and Alliston service territories were impacted. Seventeen sustained outages were caused by lightning and adverse weather. An additional 46 momentary interruptions occurred. The over-voltages from lightning strikes caused equipment failure and adverse weather conditions delayed outage restoration timelines. A total of 39,923 customers experienced sustained outages due to adverse weather conditions during the Major Event. Supply to 90% of the affected customers was restored by 6:36 p.m., approximately 8 hours after the Major Event began. Lightning Yes, used IEEE Standard 1366 Yes 39923 4 8 No No No further action is required at this time No Yes Yes n/a Burlington Hydro Inc. Burlington Hydro Inc. 2024 2024-09-05T17:01:28 2024-07-11T00:00:00 5:42 AM No Adverse weather caused a large tree limb to break and fall on the 27.6 kV feeder requiring isolation including the under build 4.16 kV lines. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 9788 14.1000003814697 7 No No No further action is required at this time No Entegrus Powerlines Inc. Entegrus Powerlines Inc. 2024 2024-11-12T16:28:38 2024-09-11T00:00:00 1:13 AM No Entegrus had no prior warning about the Major Event. On September 11, 2024, at 1:13 am, a motor vehicle hit and broke a Hydro One pole which was joint use with Entegrus 27M10 circuit. The accident caused a pole fire and locked out the 27M10 feeder. The event occurred after business hours, and as such Entegrus had on-call staff ready to respond and other staff on standby. Restoration efforts continued after hours throughout the early morning hours of September 11, 2024. The main contributing causes of the Major Event was “Foreign Interference”. The motor vehicle accident resulted in a vehicle hitting and breaking a Hydro One pole which was joint use with Entegrus’ 27M10 circuit. The accident caused a pole fire and locked out the 27M10 feeder. Others Yes, used IEEE Standard 1366 No 5390 9 3 No No Process improvements No Entegrus conducted a debriefing after the conclusion of the Major Event. Future planned St. Thomas Distribution System Plan investments include additional system sectionalization, utilizing automated and remotely operable switches, including reclosers and ERTH Power Corporation ERTH Power Corporation 2024 2024-02-29T11:39:08 2024-01-12T00:00:00 05:45 PM Yes Environment Canada had issued a Winter Storm Warning for parts of our service territory and a Winter Travel Advisory for others. On-Call staff were prepared and available while remaining crews were briefed on the weather and the potential need for extra help and sent home. During the event, additional Powerline Technicians and Operations Management staff were called in to assist. The main cause of the outages during the Major Event was “5 Equipment Failure” for a connection that failed in the wind. It took 14.5 hours from the beginning of the Event until 90% of interrupted customers were restored. Given the geography of our service territory the longest any individual customer was interrupted was 7.25 hours. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 4107 16.5 15 Yes No Process improvements No Yes Yes ERTH Power is in the process of increasing its capacity for fault detection to more quickly pinpoint the source of outages and reduce outage times. ERTH Power’s Operations department will review a procedure for debriefing meetings to discuss successes and ERTH Power Corporation ERTH Power Corporation 2024 2024-07-16T15:32:54 2024-06-25T00:00:00 12:05 PM No No, there were no warnings or watches for inclement weather prior to the event. The main cause of the outages during the Major Event was “6.1 – Tree Contact - Weather”. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 5205 20.8999996185303 5 Yes No Process improvements No ERTH Power is in the process of increasing its capacity for fault detection to more quickly pinpoint the source of outages and reduce outage times. ERTH Power’s Operations department will conduct a debriefing meeting to discuss successes and areas for imp Festival Hydro Inc. Festival Hydro Inc. 2024 2024-07-16T15:28:34 2024-05-27T00:00:00 06:35 AM No The B23D was isolated to complete planned Transmission Line work, a fault then occurred at the Hydro One Owned Stratford TS that tripped the B22D transmission line, and left Stratford TS, and all connected customers, without power until the B23D could be recalled and placed into service. Using the IEEE Standard 1366 method, the event exceeded the Major Event Day Threshold with 975,738 customer minutes. Loss of Supply Yes, used IEEE Standard 1366 Yes 15254 67.5999984741211 2 Yes No Others No Festival Hydro cannot control transmission line outages, but will continue to ensure adequate on call staff are trained and available to respond quickly to widespread outages when they occur. GrandBridge Energy Inc. GrandBridge Energy Inc. 2024 2024-10-15T12:53:31 2024-08-17T00:00:00 9:46 AM Yes The tornado warning was received approximately 15 minutes before the Major Event occurred. The Environment Climate Change Canada (ECCC) issued a warning for several areas of Ontario, including Waterloo Region at 10:45 a.m. The severe weather warning alerted the public about severe thunderstorms capable of producing tornado winds. The Environment Canada forecast did not provide sufficient time for the distributor to place additional employees on duty or on standby prior to the Major Event beginning. The main contributing cause of the Major Event was Adverse Weather – Tree Contact Weather (Cause Code 6.1). A tornado was confirmed as touching down on Greenfield Road and Northumberland in the community of Ayr. When crews arrived on site, they found a large number of downed trees and debris on many sections of the distribution lines in the area. It took 3 hours and 33 minutes to restore power to 90% of customers impacted by the Major Event. Others Yes, used IEEE Standard 1366 Yes 2883 2.5 3 No No Others No No Yes GBE is proactive in mitigating the risk of emergency by applying the appropriate distribution system designs, equipment specifications, deploying grid modernization technology, planned system maintenance, staff training and utility operating practices. Th Hydro 2000 Inc. Hydro 2000 Inc. 2024 2024-04-08T11:34:34 2024-04-03T00:00:00 09:30 PM No Following high wind and rain storm, loss supply from Supplier. Following high wind and rain storm, loss supply from Supplier. As an embedded distributor, we are dependent on Hydro One reliability. Others No, used fixed percentage (i.e., 10% of customers affected) Yes 1300 100 14 Yes Do not have third party mutual assistance agreements with other utilities No further action is required at this time No Hydro One Networks Inc. Hydro One Networks Inc. 2024 2024-06-03T16:16:07 2024-04-02T00:00:00 01:12 AM Yes An awareness call was held and employees put on alert. Weather predictions were widespread, and hardest hit areas were monitored to determine crew mobilization Severe wind and heavy rain hit the province, with numerous areas experiencing wind gusts ranging from 80 to 100 km/h. The regions most affected included West, West Central, Manitoulin Island, Georgian Bay, Central, and the Greater Toronto Area. This windstorm had a significant impact, affecting approximately 325,000 customers (about 22% of the total) from April 2nd to April 4th. According to the IEEE 1366 methodology, these days qualified as a Major Event Day. This is the second Major Event in 2024. Kingston Utilities Epcor Renfrew Hydro Elexicon Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 325000 22 64 Yes Yes No further action is required at this time No Yes Yes Enova Power Corp. Waterloo North Hydro Inc. 2022 2022-05-25T10:38:30 2022-05-14T00:00:00 18:24 PM No Waterloo North Hydro (WNH) has set up an automated email to be generated as soon as The Weather Network or Environment Canada issues weather alerts, warnings, or watches affecting any part of its service territory. If an alert is issued, WNH will begin posting outage warnings and safety alerts through social media and prepare staff for the possibility of an outage occurring. In this case, there were no weather warnings issued, so the utility had no prior warning that inclement weather or other factors could cause a major outage. N/A Customers affected - 3,384 Total Customers - 58,837 Percentage - 5.75% Lightning Yes, used IEEE Standard 1366 Yes 3384 6 2 No No No further action is required at this time No WNH has implemented several grid modernization technologies and will continue to do so to increase system reliability and operational efficiencies. An example is Survalent’s Fault Location, Isolation, and Service Restoration (FLISR) software application w Enova Power Corp. Waterloo North Hydro Inc. 2022 2022-06-03T09:14:13 2022-05-21T00:00:00 11:07 AM Yes Waterloo North Hydro (WNH) has set up an automated email to be generated as soon as The Weather Network or Environment Canada issues weather alerts, warnings, or watches affecting any part of its service territory. On May 21, 2022, WNH received a severe thunderstorm watch alert for parts of its service territory at approximately 12:10 p.m. The warning was not issued early enough for WNH to plan for additional resources to be made available. The storm rolled through Southern Ontario in the afternoon of Saturday May 21, 2022, bringing heavy rain, 132 km/h winds and hail in some areas. There were 8,925 Customer Interruptions for 1,507,297 Customer Minutes of Interruption. This event is classified as a Major Event using the IEEE 1366 standard. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 8925 15 8 Yes No No further action is required at this time No No Yes WNH has implemented several grid modernization technologies and will continue to do so to increase system reliability and operational efficiencies. An example is Survalent’s Fault Location, Isolation, and Service Restoration (FLISR) software application w Entegrus Powerlines Inc. Entegrus Powerlines Inc. 2022 2022-06-14T13:41:23 2022-06-01T00:00:00 1:31 PM Yes Environment Canada issued a Severe Thunderstorm Watch for certain locations within Southwestern Ontario approximately 1 hour before the first outage, which occurred in Chatham at 1:31pm on June 1. The boundaries of the EPI service territory stretch from Wheatley in the southwest to Parkhill in the northeast. The boundaries are non-contiguous, and the distance across the Entegrus service territory is approximately two hours travel time by vehicle. Accordingly, Entegrus operates two operational centres, one in the Entegrus southwest region (located in Chatham) and another in the Entegrus northeast region (located in St. Thomas). As described in question #1 above, Entegrus had approximately 1 hour of prior warning before the storm. The event occurred during regular business hours, and as such Entegrus had a full operations staff complement at the time of the storm. Restoration efforts continued after-hours throughout the evening of June 1 into the early morning hours of June 2. The storm resulted in numerous broken poles, downed lines, and a downed three-phase transformer. The communities of Chatham and Wallaceburg experienced the largest amount of wind damage. Adverse Weather-Wind No, used fixed percentage (i.e., 10% of customers affected) Yes 62500 24 7 Yes No System upgrades No No No Entegrus conducted a debriefing after the conclusion of the Major Event, which reinforced the benefits of recent and ongoing Distribution System Plan investments, which assist in mitigating additional storm outages that may have otherwise been experienced ENWIN Utilities Ltd. ENWIN Utilities Ltd. 2022 2022-04-08T11:17:21 2022-02-18T00:00:00 12:55 AM No There was a localized ice storm at the time of the outage which adversely affected Hydro One's 115kV supply lines in the City of Windsor, resulting in Loss of Supply. There was a localized ice storm at the time of the outage which adversely affected Hydro One's 115kV supply lines in the City of Windsor. As the Major Event started at 12:55 a.m. and was resolved by 4:38 a.m., the outage was a non-issue for most customers, with the exception of some large manufacturers that operate overnight. 16,692 individual customers were each interrupted 3 times during the Loss of Supply which caused the Major Event. It took 3.7167 hours to restore 90% of customers who were interrupted. Loss of Supply Yes, used IEEE Standard 1366 No 16692 18 4 Yes No No further action is required at this time No The Major Event was related to Loss of Supply, and ENWIN’s Control Room is trained to manage such events. ENWIN was able to remotely reconfigure its distribution system which shortened the outage for customers by approximately 2 hours. Burlington Hydro Inc. Burlington Hydro Inc. 2019 2019-01-28T11:55:15 2018-05-04T00:00:00 15:00PM There was limited warning from Environment Canada of strong winds and thunderstorms with the potential to cause widespread power outages across Southern Ontario. The wind storm was more serious than forecasted. Burlington Hydro used existing on call crews available. Additional crews and third-party contractors were notified to be on standby after the extent and damage of the wind storm was realized. Yes. Burlington Hydro works safely to restore power to the largest areas first and then works its way down to single outages. Fire, police and wires down take priority. Outages in Burlington Hydro's service area, mainly due to downed wires and trees began at 15:00PM and were the major cause of outages. A total of 28,714 customers were affected representing approximately 43% of Burlington Hydro's customers. The event was beyond Burlington Hydro's control and exceeded Burlington Hydro's daily SAIDI threshold used to identify a Major Event. It took approximately 26 hours to restore 90% of the customers affected - they were restored at 17:26 on May 5th. Yes, contractors and other electric utilities were used as follows: May 4th - KLine; May 5th - KLine; May 6th - KLine, Canadian Niagara Power, Waterloo North Hydro and Oakville Hydro; May 7th - KLine, Canadian Niagara Power, Waterloo North Hydro, Oakville Burlington Hydro is reviewing the hardware which supports its Outage Management System to mitigate technical issues in the future. This will ensure the public is notified in a timely manner on outages and ETRs. Burlington Hydro Inc. Burlington Hydro Inc. 2019 2019-01-28T12:06:30 2018-09-09T00:00:00 03:36AM No. Environment Canada issued a special weather statement of a wind/rain storm for areas between Windsor and Cornwall, including Brantford and Brant County and warned that areas along Lake Erie and Lake Ontario could get between 20 and 40 millimetres of rain over the next few days. The storm was the last remnant of Tropical Depression Gordon. However, Burlington Hydro had no indication that this would be a major event. N/A - However, Burlington Hydro arranged to have extra on call crew available and notified its third-party contractor to be on standby. Yes. Burlington Hydro works safely to restore power to the largest areas first and then works its way down to single outages. Fire, police and wires down take priority. A total of 5,180 customers were affected by the outage representing 7.7% of Burlington Hydro?s customers. The event was beyond Burlington Hydro?' control and exceeded Burlington Hydro's daily SAIDI threshold used to identify a Major Event. It took 16.5 hours to restore 90% of the customers affected - they were restored at 20:24PM. No Burlington Hydro is reviewing the hardware which supports its Outage Management System to mitigate technical issues in the future. This will ensure the public is notified in a timely manner on outages and ETRs. Burlington Hydro Inc. Burlington Hydro Inc. 2019 2019-11-18T09:51:15 2019-10-01T00:00:00 16:17 PM There was limited warning from Environment Canada of strong winds and thunderstorms with the potential to cause widespread power outages across Southern Ontario. Thunderstorm and winds were more serious than forecasted. Existing Burlington Hydro on call crew was available. Additional Burlington Hydro crews and third party contractors (K-Line and Beswick) were notified and used in restoration activities after the severity of the storm was realized. Yes. Burlington Hydro works safely to restore power to the largest areas first and then works its way down to single outages. Fire, police and wires down take priority. A total of 21,260 customers were affected by the outage representing 31% of Burlington Hydro’s customers. The event was beyond Burlington Hydro’s control and exceeded Burlington Hydro’s daily SAIDI threshold used to identify a Major Event. It took 9 hours and 33 minutes to restore 90% of the customers affected. Customers were restored at 1:50am on October 2nd. Yes. Contractors K-Line and Beswick Tree Service were used. Burlington Hydro is reviewing the hardware which supports its Outage Management System to mitigate technical issues in the future. This will ensure the public is notified in a timely manner on outages and ETRs. Canadian Niagara Power Inc. Canadian Niagara Power Inc. 2018 2018-08-14T09:43:30 2018-06-13T00:00:00 4:20 AM On June 12, 2018, Environment Canada issued wind warnings for much of Southern Ontario, indicating that damaging winds were expected on June 13, 2018. The extreme winds were forecasted to begin in late afternoon early evening on June 13, 2018. CNPI had a normal complement on-call during the overnight hours from June 13-14th, with the ability to call in additional crews if required. Additional crews were made available for outage response on June 13th, with many crews working into the overnight and morning to complete restoration. CNPI has a Business Continuity and Disaster Recovery Plan that is periodically updated and reviewed at the management level. This plan is designed to assist in the response to natural disasters, accidents, major outages, environmental disasters, municipal CNPI considered this a Major Event due to the extreme and uncontrollable nature of the wind?s intensity and the resulting substantial impact on CNPI?s network and customer base. The gusting of the wind in this area exceeded the criteria specified in CNPI?s distribution design standards and CNPI could not have reasonably designed its system to avoid all outages in this situation. It took approximately 4 hours to restore 90% of the customers who were interrupted by this Major Event. CNPI did not utilize assistance through a third party mutual assistance agreement, however we did utilize a private utility-based contractor to assist with restoration efforts. CNPI conducted a round table discussion with contributors from the company operation departments, to review all facets of the Major Event, including the event itself, response and restoration efforts, resource allocation and technological assistance. Centre Wellington Hydro Ltd. Centre Wellington Hydro Ltd. 2018 2018-07-03T11:57:47 2018-05-04T00:00:00 04:03 PM Yes, Centre Wellington Hydro was aware of severe weather forecasts leading up to the Major Event. Environment Canada issued a wind warning shortly before 11:00 a.m. on May 4, 2018, indicating that wind gusts between 90 and 100 km/h were possible on this day in Centre Wellington and surrounding areas. Environment Canada noted that damage to buildings and tree branches were possibilities given forecasted high winds. A severe thunderstorm watch was also issued by Environment Canada. CWH ensured that all staff was available and able to respond if required, including the regular scheduled on-call crew as well as those line crew members who were not scheduled to be on-call. Yes, CWH, through daily work, training and preparedness ensures that the operation staff and equipment are ready to respond when required. CWH calculates the TMED based on the previous 5 year historical years outages. This specific event had a value greater than the 5 historical average. This specific outage damaged CWH’s overhead plant equipment which caused a large customer base to have their power interrupted. This event was also beyond the control of CWH. It took CWH 1 hour to restore all customers. No. CWH was prepared to respond for this major event and continues to replace aging infrastructure through capital investments, repairs and maintains equipment on appropriate schedules and completes adequate training in preparedness to mitigate the impact of Elexicon Energy Inc. Veridian Connections Inc. 2018 2018-06-05T14:56:01 2018-04-04T00:00:00 11:55 AM Yes, Environment Canada issued a Wind Warning for Southern Ontario on April 3rd at 15:21 noting the pending wind and then again on April 4th at 15:50. Veridian enacted its Power Restoration Plan, which dictates the requirements for extra standby of employees. These included, but were not limited to: Customer Care Staff, Lines Staff, System Operators, Communications Personnel and Management. The event occurred during business hours so all available staff were already at work. Veridian performs a tabletop exercise of its Power Restoration Plan in November of every year, where Veridian carries out roundtable discussions of how to tackle a hypothetical major event. The weather event on April 4 was beyond the control of the utility which satisfies elements of being unpreventable or unavoidable. When assessed using the IEEE 1366 2.5 beta method applied to five years of historic reliability data, the result exceeds the daily SAIDI threshold and therefore April 4 was deemed as a major event day. 7 hours, 90% of customers were restored by April 4, 18:47. No. Outside assistance wasn?t required. Per the Veridian Power Restoration Plan, a debrief session takes place after each major event. This debrief session is used to analyze the response to the outage to determine the requirement for further training, process, policy and/or Power Restoration P Hydro Ottawa Limited Hydro Ottawa Limited 2018 2018-11-19T00:00:00 2018-09-21T00:00:00 12:24 PM Weather forecasts indicated that active weather was probable for the afternoon and evening of September 21st. Wind gusts exceeding 80 km/h were forecast. System Operations personnel reviewed weather radar from several sources early in the day, and at that time the weather system appeared to be tracking toward the Ottawa area. During the event there were two tornadoes (class EF-2 and EF-3) and winds up to approximately 260 km/h. Hydro Ottawa had a full complement of on-shift personnel, and a full on-call roster of field technicians and management personnel. All Operations groups were notified early in the day of the approaching weather. On-Call trades personnel were sent home at approximately 12:00 p.m. to rest for evening/overnight restoration work. Hydro Ottawa has an established Electrical Emergency Response Plan and Organization. Formal training is completed annually according to Market Rules, and a weekly preparation meeting is held to refresh on-call management personnel. This event was considered to be a Major Event Day based on the IEEE Standard 1366 method. The daily SAIDI value of 1221 on September 21, 2018 exceeded the daily SAIDI threshold of 5.5, as determined by IEEE Standard 1366, based on the daily SAIDI values for the past five years. The total number of customer hours interupted was 6808300. It took approximately 55 hours from the activation of our Electrical Emergency Response Plan to restore 90% of affected customers. Alectra Utilities provided Lines personnel under the Hydro One Mutual Assistance Agreement with Ontario Local Distribution Companies (LDC's) . Hydro Ottawa also used third-party contractors for Forestry and Lines work. A debrief of the event was held with all stakeholders. There will be continued focus on on-call and emergency response preparation. InnPower Corporation InnPower Corporation 2018 2018-07-12T15:10:44 2018-05-04T00:00:00 16:09:PM InnPower Corporation ("IPC") actively monitors short and long term weather patterns to identify weather related risks. The distributor was aware of this risk being a major event. IPC did arrange to have extra customer service representatives on duty to handle the anticipated increase in call volume, engineering technologists on standby to help with line patrols and contracted and on-call line crews on standby to respond to emergencies and repairs. IPC is actively working on developing its emergency response and business continuity plans. Staff have basic training in dealing with Major Events and typically take direction from senior management or persons appointed by senior management. On determinat This event was considered by IPC to be a Major Event as it deviated significantly from the normal system reliability pattern experienced by the distributor. The event created a significant and impactful outage to a large number of customers. It took approximately 28 hours to restore 90% of interrupted customers. No Multiple steps are being taken to mitigate the impact of future Major Events such as this one. First, staff training, emergency management and business continuity processes are being developed and put in place based on Emergency Management Ontario practic Lakeland Power Distribution Ltd. Lakeland Power Distribution Ltd. 2018 2018-11-21T00:00:00 2018-09-21T00:00:00 1:12 pm No N/A No This event is considered a Major Event as it meets all criteria specified in the OEB File EB-2015-0182 and RRR Section 2.1.4.2. 18.63 hrs. No LPDL reviewed the existing mutual assistance agreements to ensure that they were current and relevant. Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2017 2017-05-10T09:04:40 2016-05-25T00:00:00 No. Not applicable. Major Event procedures are available and reviewd annually. The event was considered a Major Event in accordance with OEB RRR definition i.e. unpredictable and beyond the control of the distributor and using fixed approach methodology i.e. met the ME criteria for 10% of total customers affected 100% of the customers were restored in 1.15 hours. No, (3rd party mutual assistance was not necessary for this one-hour duration Major Event outage). This car accident was an unpredictable event, outside of the distributor's control i.e. root cause was Foreign interference. No specific training or process improvements required to mitigate for this type of event. Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2017 2017-06-21T00:00:00 2017-04-22T00:00:00 No Not applicable Major event procedures are available and reviewed annually. The event was considered a Major Event in accordance with OEB RRR definition i.e. unpredictable and beyond the control of the distributor and using fixed approach methodology i.e. criteria for 10% of total customers affected. 90% were restored in under 6 hours; (i.e. 58% or 4,702 interrupted customers were restored in 5 minutes, while 42% or 3,368 interrupted customers were restored in 5 hrs 59 mins). No. i. Continued encouragement and reminders to customers to maintain their equipment; ii. Installation of more fault indicators on the overhead distribution system in an effort to reduce trouble-shooting time. Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2017 2017-07-10T00:00:00 2017-05-11T00:00:00 No Not applicable Major event procedures are available and reviewed annually. The event was considered a Major Event in accordance with OEB RRR definition i.e. unpredictable and beyond the control of the distributor and using fixed approach methodology i.e. criteria for 10% of total customers affected. 100% were restored in under 1 hour; (i.e. 88% or 4,375 interrupted customers were restored within 24 minutes, while 2% or 594 of the interrupted customers were restored in 58 minutes). No Continued participation in study groups investigating improved methodologies in mitigating power interruptions due to animal/wild-life as well as installation of more effective animal mitigation devices. Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2017 2017-12-01T00:00:00 2017-10-15T00:00:00 Outage 1 ? No Not Applicable Major event procedures are available and reviewed annually. The event was considered a Major Event in accordance with OEB RRR definition i.e. unpredictable and beyond the control of the distributor and using fixed approach methodology i.e. criteria for 10% of total customers affected. 90% of customers had their power restored within 2 hours and 29 minutes; restoration time was dependent on Hydro One who needed to first replace their broken poles. No, third party assistance was not required. Discussion with Hydro One to understand any risks and/or measures to be implemented to mitigate a re-occurrence of the incident. Hydro One Networks Inc. Hydro One Networks Inc. 2024 2024-06-07T09:19:20 2024-04-12T00:00:00 12:23 AM Yes Emergency Operations Centre (Distribution) (EOC-D) calls were set up on April 12 and periodically throughout the event. In the initial April 12 EOC-D morning call, in addition to full staff availability in supporting LOBs, confirmed availability of Dx Lines crews on-call, 300 contractors available. Heavy Rain and Severe wind swept through Southern, Central and Northeast Regions. Northeastern Ontario experienced gusts between 80 to 90 km/h, and Southern Ontario saw gusts between 80 to 95 km/h. There was sustained wind in the Lakeshore area of Lake Huron and Georgian Bay areas with gusts between 90 to 110 km/h. This windstorm impacted a total of approximately 96,000 customers (about 6.5% of the total) on April 12th. The day of April 12th qualified as the Major Event Day based on IEEE 1366 methodology. Approximately 6.5% of Hydro One’s customer based was interrupted during the event. It took 34 hours and 55 minutes from the onset of the Major Event to restore 90% of customers Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 96000 6.5 35 No No No further action is required at this time No Yes Yes Hydro One Networks Inc. Hydro One Networks Inc. 2024 2024-08-12T17:21:23 2024-06-13T00:00:00 12:45 AM Yes The IBM Predication Software and Weather Monitoring tool indicated the potential for a significant event. A SENS of information was issued for potential severe weather over days Wednesday, June 12th and Thursday, June 13th specifically. The weather system was monitored and proactively prepared for, since early afternoon Wednesday. A severe thunderstorm passed through the province with high wind (wind gusts up to 110km/h) and tornados, combined with localized heavy rainfall and very frequent lightning. It hit the grid and brought significant impact. This thunderstorm impacted a total of ~142,000 (9.5%) customers for June 13, and restoration extended into June 15 impacting an additional ~30,000 (2.0%) customers. The day of June 13 qualified as the Major Event Day based on IEEE 1366 methodology. It took 41 hours and 26 minutes from the onset of the Major Event. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 142000 9.5 41 Yes No No further action is required at this time No Yes Yes N/A Hydro Ottawa Limited Hydro Ottawa Limited 2024 2024-04-26T12:51:53 2024-02-28T00:00:00 2:52 PM Yes Yes. Winds were forecasted the day prior, and in response, Hydro Ottawa executed its Major Incident Preparedness Process. Hydro Ottawa had a full complement of on-shift personnel, and a full on-call roster of field technicians and management personnel on-site ready to respond prior to the forecasted weather. On February 28th, 2024, there were multiple outages in Hydro Ottawa's system impacting 21,911 customers due to extreme wind conditions. The majority of them occurred in the afternoon and into the night as high winds hit Hydro Ottawa’s service territory. There were two large outages impacting 18,437 customers: - At 9:21 pm the extreme wind event caused a major interruption by tripping the breaker A9M3 at South March TS station and interrupting 10,409 customers fed from distribution stations Beaverbrook MS, Janet King DS, Richmond North DS and Munster DS. - At 10:27 pm the Hydro One A8M 115kV transmission supply tripped resulting in a loss of supply to Hydro Ottawa substations Uplands MS and Merivale MS which led to 8,028 Hydro Ottawa customer outages. There were smaller outages in the afternoon interrupting 3,443 customers (16% of total customers impacted by the weather event). Starting at 9:21 pm, there were two large interruptions impacting 18,437 customers (85% of total customers impacted by the weather event). It took 12 hours and 18 minutes since the event started to restore 90% of the customers impacted by the weather event; however, it took five hours and 39 minutes since the time the large interruptions occurred to restore 90% of the customers interrupted. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 21911 6 12 Yes No Process improvements No Yes Yes There is an ongoing focus on on-call and emergency response preparations with the goal of continuous improvement. InnPower Corporation InnPower Corporation 2024 2024-06-20T13:14:50 2024-06-13T00:00:00 8:14 PM Yes InnPower was aware that there was extreme weather coming as its system control group continually monitors the weather and system conditions. InnPower always has at least two line employees, one supervisor and one customer service management support on call for emergencies. Additional staff were called in as more outages occurred Our service area was impacted by a thunderstorm on the evening of Thursday, June 13. While four crews were already addressing a broken pole from an MVA early that evening, a second operation team and an engineering tech joined to accelerate the assessment and repair of storm damages. The storm caused three of the four HONI feeders supplying our area to lockout around 8:14 PM, affecting 15,799 customers. Power was restored to 15,292 customers on Barrie M3 and Alliston M1 within 10 minutes. However, restoration of Alliston M4, affecting 507 customers, took longer until HONI cleared the line by 3:35 AM the next day. Although, we could restore power to 111 of those 507 customers earlier at 1:15 AM. Restoration efforts continued throughout the night with six crews working until 6:00 AM the next day. After a short break, a fresh team from IPC Operations and a team from third party contractor resumed the process. This seamless handover ensured continuous restoration efforts throughout the night with subsequent crews taking over around 4:00PM until late evening. During this response, crew restored power to 570 customers (in addition to those affected directly by loss of supply), replaced two storm-damaged poles, conducted 20 inspections, removed 12 trees/branches from power lines, and issued 6 supporting guarantees. Notably, five of six these guarantees were reconnected by the end of the day or the following day, minimizing customer inconvenience. All customer inquiries were successfully addressed by our crews. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 16563 71 6 Yes No Others No Yes No InnPower is improving its reliability through vegetation management programs and also adding smart devices in the field for better and faster restoration. London Hydro Inc. London Hydro Inc. 2024 2024-01-03T09:24:11 2023-11-10T00:00:00 03:37 AM No N/A On Friday, November 10 at 3:37am a vehicle struck and broke a hydro pole that was installed far away from the curb, behind a sidewalk, exceeding minimum clearance requirements. This caused an outage to 8,450 customers across two main feeders as this pole location carried two feeders. Furthermore, the customer count on the impacted feeders was higher than normal as the system was abnormally configured due to a construction process occurring on another feeder. Using automated devices, 82% of the customers were restored within half an hour after reports were received of the accident. Due to the location of the incident, temporary switches were required to be installed on both feeders to safely isolate the accident location, and restore power to the remaining groups of customers. The major event started at 3:37am on November 10th, and over 90% of customers were restored by 10:25am on November 10th. Others Yes, used IEEE Standard 1366 Yes 8450 5.09999990463257 7 No No Others No For the specific accident location, bollards have been installed to protect the pole and mitigate any future outages at this location. Additionally, sectionalizing switches were left installed at this pole location to provide switching capabilities to aid London Hydro Inc. London Hydro Inc. 2024 2024-08-21T16:00:17 2024-06-25T00:00:00 11:43 AM Yes Environment Canada issued a special weather statement for the London area but it did not call for such a major event causing tornado-like winds that were seen. The Major Event happened during normal working hours. London Hydro had all employees available to assist during the event. High winds accompanied by heavy rain, passed through London Hydro's distribution area on June 25, 2024 at around 11:43am. The resulting high wind from the storm knocked down trees throughout the region that damaged various hydro poles and power lines. OEB Cause Code; Adverse Weather - Tree Contact Weather / Loss of Supply The major event started at 11:43am on June 25th, and over 90% of customers were restored by 3:16pm on June 25th. Others Yes, used IEEE Standard 1366 Yes 47132 28.1000003814697 3 Yes No Others No Yes No London Hydro has an Emergency Procedures Plan; training and mockups are performed annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of extensive damage to London Hydro Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2024 2024-05-29T13:58:55 2024-04-04T00:00:00 2:06AM No A spring storm that hit Quebec and Ontario on April 4, 2024, knocked out power to tens of thousands of customers. By Thursday morning, heavy, wet snow dominated several regions, causing widespread power outages, airport delays, and road closures. In the early morning of April 4, 2024, several tree contacts and station recloser operations were experienced on the distribution system in Tay Township due to strong winds from a storm that hit Ontario and Quebec. At 2:06 AM, an outage was experienced at Port McNicoll station in Tay Township. Upon arrival, a feeder recloser was found to be on fire. Once the fire was extinguished, oil was found in the vicinity of the recloser and the station power transformers. Furthermore, upstream fuses were blown. Due to the extent of the damage and oil spill, it was unknown at the time if the transformer had become defective as a result from the sequence of events. The site was cleaned up, the recloser and fuses were replaced, and the transformer was successfully tested. The first attempt to energize the station occurred at 3:24PM but was not successful. Upon further inspection and patrols of the overhead lines, additional tree branches were found on one of the feeders due to ongoing strong winds. The branches were cleared, and the station was successfully energized at 6:13PM on April 4, 2024. Among the 3,568 customers, 1,805 customers experienced a short power interruption, approximately 13.3 hours into the outage event, in order accommodate switching and repair work for Port McNicoll station. The remaining 1,763 customers were restored when the Port McNicoll station was restored at 6:13PM, a process that took 15.93 hours. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 3568 7.90000009536743 16 No No No further action is required at this time No Major Event was due to adverse weather conditions, therefore no further action is required by NT Power at this time. Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2024 2024-10-11T09:54:08 2024-08-17T00:00:00 04:43 PM Yes Before the day of the storm, the Weather Network issued a tornado watch for southern Ontario, which remained in effect through the afternoon of August 17 due to a severe storm threat. On August 17, a severe thunderstorm and rainfall warning was issued, as the weather system brought significant torrential rainfall and gusty winds. Operations team continually monitors the weather events and system conditions NT Power had a full complement of standby staff and extra staff who could be called out to respond to possible power outages. Contributing causes include: Loss of Supply Adverse Weather - Wind Lightning On August 17, 2024, a severe thunderstorm swept across the Greater Toronto Area, bringing record-breaking rainfall and lightning that led to widespread flooding and damage. As a result, a feeder circuit breaker at one of the supply authority stations in the Town of Newmarket locked out. 100% were restored in 1.72 hours. Loss of Supply Yes, used IEEE Standard 1366 Yes 5048 11.1999998092651 2 Yes No No further action is required at this time No Yes No Major Event was due to adverse weather conditions; therefore, no further action is required by NT Power at this time. North Bay Hydro Distribution Limited North Bay Hydro Distribution Limited 2024 2024-11-13T10:25:09 2024-08-18T00:00:00 03:34 PM No A transmission issue on Hydro One’s line during severe weather and high winds caused a service outage across the entire service territory. The Hydro One-owned Espanola Transformer Station is supplied by the S2B 115kV circuit, which also serves other Hydro One Distribution Stations (DS) in the area. While Hydro One has not yet confirmed the cause, it is suspected that the outage may have resulted from a broken crossarm, given the unusually high winds that afternoon and evening. The outage began on August 18, 2024, at 15:34, with power restored to 2,808 customers in the Espanola region by 22:15 the same day. The remaining 520 customers had service restored by 03:00 on August 19, 2024. o 6.68 hours for 2808 customers & 11.43 hours for 520 customers Loss of Supply Yes, used IEEE Standard 1366 Yes 3328 12.1000003814697 7 Yes No No further action is required at this time No NBHDL has submitted a loss of supply report to Hydro One but has yet to receive a response. Given the circumstances, NBHDL has limited options to mitigate major events related to loss of supply, especially when the transmission circuit is affected. Any in Toronto Hydro-Electric System Limited Toronto Hydro-Electric System Limited 2024 2024-09-12T10:11:21 2024-07-16T00:00:00 11:41 AM No As the Major Event was initiated by a Loss of Supply, Toronto Hydro did not have any prior warning that the Major Event would occur. This Major Event was initiated by a cause code 2.1 Loss of Supply Transmission. In July, 2024, Toronto experienced unprecedented rainfall totaling over 208mm. Nearly half of this occurred on July 16, 2024, when 100mm of rain fell, marking the fifth largest rainfall in the city’s recorded history. This resulted in severe flooding throughout the Greater Toronto Area (GTA). Manby TS, a Hydro One Networks Inc. (HONI) transmission station on the west end of the GTA, experienced significant flooding in all four relay room basements, resulting in the maloperation of several protection systems. This removed multiple 230kV and 115kV transmission lines from service at 11:41 am, resulting in the disconnection of nine different Toronto Hydro transformer stations throughout the city and the interruption of approximately 878 MW of power, impacting over 200,000 Toronto Hydro customers. No additional comments. Loss of Supply Yes, used IEEE Standard 1366 Yes 207000 26 10 Yes No Others No Toronto Hydro recently collaborated with Hydro One Networks Inc. (HONI) to conduct an operations-based workshop aimed at enhancing protocols for major incident communication between their operations centres. Additionally, HONI will undertake a Post-Event Wasaga Distribution Inc. Wasaga Distribution Inc. 2024 2024-05-27T14:29:04 2024-04-02T00:00:00 21:25 No N/A This outage was caused by high winds resulting in a tree contact. N/A Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 5467 35 6 Yes No Others No Wasaga Distribution has: • Debriefed staff to discuss lessoned learned • Confirmed the existing maintenance and capital programs that assisted in minimizing the customers interrupted during the Major Event. Wasaga Distribution Inc. Wasaga Distribution Inc. 2024 2024-05-27T14:33:21 2024-04-06T00:00:00 2:30:AM No N/A This outage was caused by a car accident no Loss of supply. N/A Others Yes, used IEEE Standard 1366 Yes 9490 61 3 No No Others No Wasaga Distribution has: • Debriefed staff to discuss lessoned learned • Confirmed the existing maintenance and capital programs that assisted in minimizing the customers interrupted during the Major Event. Wasaga Distribution Inc. Wasaga Distribution Inc. 2024 2024-09-23T14:49:03 2024-07-14T00:00:00 13:22 DST No N/A. The Cause of Interruption was identified as loss of supply as a result of tree contact to Hydro One's lines. NA Loss of Supply Yes, used IEEE Standard 1366 Yes 9284 46 2 No No Others No Wasaga Distribution has: • Debriefed staff to discuss lessoned learned • Confirmed the existing maintenance and capital programs that assisted in minimizing the customers interrupted during the Major Event. Wellington North Power Inc. Wellington North Power Inc. 2024 2024-03-01T16:01:56 2024-02-27T00:00:00 11:16 AM No 44kV supply feed from Hydro One’s Palmerston Transmission Station was interrupted resulting in a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). At the time of the Loss of Supply, there was a severe thunderstorm in the area with lightning. Hydro One reported the cause of the outage was “Palmerston Z bus tripped from bus protection. Cause of the trip was due to a feeder breaker fail operation.” During the Loss of Supply, a large section (east-side and north-west) of Mount Forest (WNP’s service territory) was without power. Power was restored to Mount Forest at 12:52 pm on February 27, 2024. Outage was 1.60 hours (96 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 1954 45 2 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Hydro One Integrated System Operating Centre (ISOC). Wellington North Power Inc. Wellington North Power Inc. 2024 2024-06-05T12:57:31 2024-05-22T00:00:00 2:43 PM No Wellington North Power Inc. did not have prior warning that the Major Event would occur. The cause of the interruption was Cause Code 6: Adverse weather; Sub-Cause: 6.1 Tree contact weather. During a thunderstorm on May 22, 2024, a large tree branch fell on Wellington North Power Inc.’s (WNP) 44 kV overhead powerline running along Normanby Street North / Wellington Street West in the town of Mount Forest, the distributor’s service area. Consequently, this locked out 3 of the LDC’s substations resulting in a power outage to the town of Mount Forest. As this was the 44 kV powerline, the reclosure tripped at Rothsay therefore de-energizing Hydro One’s transmission line between Rothsay to Mount Forest. WNP hydro crews cleared the fallen tree branch and other branches from its 44 kV powerlines. Once cleared, WNP requested HONI to re-energize the 44 kV powerline section from Rothsay to Mount Forest. HONI re-energized the 44 kV supply and power was restored. At the time of the power outage, there was a severe thunderstorm in the area with strong winds and lightning. For 90% of customers, power was restored to Mount Forest at 3:52 pm on May 22, 2024. Outage was 1.15 hours (69 minutes). Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 1954 45 1 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Hydro One Integrated System Operating Centre (ISOC). Wellington North Power Inc. Wellington North Power Inc. 2024 2024-08-08T12:11:38 2024-07-29T00:00:00 11:49 pm No The cause of interruption was Cause Code 2: Loss of Supply. 44kV supply feed from Hydro One’s Palmerston Transmission Station was interrupted resulting in a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). Hydro One reported the cause of the outage was a downed wire at Teviotdale. During the Loss of Supply, a large section (east-side and north-west) of Mount Forest (WNP’s service territory) was without power. For 90%+ of customers, power was restored to Mount Forest at 4:59 am on July 30, 2024. Outage was 5.17 hours (310 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 1954 45 5 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Hydro One Integrated System Operating Centre (ISOC). Wellington North Power Inc. Wellington North Power Inc. 2024 2024-10-29T09:40:40 2024-10-08T00:00:00 5:39 PM No The cause of interruption was Cause Code 2: Loss of Supply. 44kV supply feed from Hydro One’s Palmerston Transmission Station was interrupted resulting in a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). Hydro One reported the cause of the outage was failed equipment (a broken insulator). During the Loss of Supply, all of Mount Forest (WNP’s service territory) was without power. Outage was 5.00 hours (300 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 2885 66 5 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Hydro One Integrated System Operating Centre (ISOC). Alectra Utilities Corporation Alectra Utilities Corporation 2023 2023-01-16T16:11:35 2022-12-23T00:00:00 7:51 AM Yes Environment Canada issued a major winter storm warning for southern Ontario. In anticipation of the adverse weather event, Alectra’s staff were briefed on forecasted weather and additional staff were made available from December 21 through December 25, 2022. Additionally, Alectra’s Corporate Communications Team was on standby in anticipation of the weather event to advise customers and to provide updates to disruptions and/or emergency situations. Additional Comments for Q3: Alectra informed customers of imminent adverse weather conditions and associated emergency preparedness via social media channels (Twitter, Facebook and Instagram). The communication included emergency preparedness information from Alectra’s website and YouTube videos illustrating important safety messages. A proactive News Release also was sent out over Canada NewsWire on December 21st (“Incoming storm may cause power outages, Alectra reminds customers to ensure mobile devices are charged and emergency kits are ready.”) This release was picked up by multiple news outlets and Alectra’s Media Spokesperson was interviewed. The release was subsequently picked up by Global News, St Catharines Standard, 105.9 The Region, News Talk 610, CTV Morning Live, and CTV News. Additional Comments for Q4: Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its operational areas. The Emergency Plan is based on the Incident Management System (“IMS”) and requires training exercises be conducted annually. Exercises are debriefed and critiqued, and a written summary of the debriefing is distributed to all staff participating in the exercise. Training of Alectra Utilities’ system controllers (and others, as required) is performed on an ongoing basis, and regular review of the Emergency Plan is also undertaken. On December 23, 2022, there was a major winter storm with wind gusts up to 110 km/hour, rain, snow, and flash freezing which resulted in long duration outages across Alectra’s service territory. There were also fallen trees and broken conductors which required repair. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 58206 5.40000009536743 16 No No No further action is required at this time No Yes Yes Bluewater Power Distribution Corporation Bluewater Power Distribution Corporation 2023 2023-07-20T13:16:02 2023-07-13T00:00:00 02:45am No Summer storm passed through area with high winds causing tree contact and branches on lines in various locations throughout service area The outage began at 2:45am and 90% of the customer were restored by 9:21am - 6 hours, 36 minutes. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 8579 23 7 No No No further action is required at this time No Bluewater Power Distribution Corporation Bluewater Power Distribution Corporation 2023 2023-08-29T10:42:32 2023-07-20T00:00:00 4:oo pm Yes There were weather watches and warnings through news/weather services about potential threatening storms in the area. We arranged to have extra employees available through the night night as required. A storm with a tornado warning passed through the area with high winds causing tree contact and branches on lines in various locations throughout our service area. 90% of customers were restored 19 hours and 44 minutes. Entegrus Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 23907 64 20 No Yes No further action is required at this time No Yes Yes Burlington Hydro Inc. Burlington Hydro Inc. 2023 2023-09-15T11:25:11 2023-07-27T00:00:00 4:36AM No Adverse Weather-Wind caused large tree limbs from adjacent property to fall across two feeders in ROW. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 10678 15 5 No No No further action is required at this time No Burlington Hydro Inc. Burlington Hydro Inc. 2023 2023-09-15T11:32:05 2023-08-02T00:00:00 5:23AM No Adverse Environment - Major structure fire at a construction site which was in close proximity to wood pole line with multiple feeders which became engulfed in flames. Adverse Environment-Fire Yes, used IEEE Standard 1366 Yes 8775 13 7 No No No further action is required at this time No Canadian Niagara Power Inc. Canadian Niagara Power Inc. 2023 2023-02-21T15:42:36 2022-12-23T00:00:00 02:00 AM Yes On Wednesday, December 21st, 2022, Environment Canada issued wind warnings for much of Southern Ontario, indicating that damaging winds were expected on Friday December 23rd and Saturday December 24th. CNPI’s Regional Manager held numerous meetings with the Operations Department during the week of December 19th regarding the potential wind speeds prior to the storm. Appendix A depicts the Special Weather Statement from Environment Canada and the High Wind Watch from the National Weather Service. All arrangements for standby were made before the storm began. CNPI secured internal resources for the holiday weekend prior to December 23rd. CNPI sent employees home for rest time on December 22nd in order to optimize the available staff hours to respond to the impending storm. On December 23rd and 24th, a snow and wind storm hit the CNPI service territory. Wind gusts of up to 125 km/hr caused trees to fall onto and damage CNPI line infrastructure, which resulted in outages. Blowing snow caused very poor visibility, and vehicles were unable to safely travel on the roadways. Due to the ongoing poor weather, new outages began throughout the period (including on December 23, 24, 25, etc). That is to say, these 90% of interruptions did not all begin with the first outage. CNPI utilized assistance from the following companies through third party mutual assistance agreements: • Welland Hydro • Niagara Peninsula Energy • NOTL Hydro • Burlington Hydro • Cornwall Electric * CNPI also used a number of private utility-based contr Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 32088 106 104 No Yes Others No Yes Yes Throughout the course of the event, and shortly after completing restorations, key CNPI personnel were in regular communication to discuss challenges CNPI and successes in managing all facets of the restoration efforts. This helps understand what worked a Canadian Niagara Power Inc. Canadian Niagara Power Inc. 2023 2023-04-19T09:10:20 2023-02-22T00:00:00 23:20 PM Yes On Wednesday, February 22nd, 2023, Environment Canada issued freezing rain warnings for Southern Niagara, indicating that freezing rain leading to build-up and high winds were expected on Wednesday February 22nd and Thursday February 23rd. CNPI’s Regional Manager held meetings with the Operations Department on Tuesday February 21st and Wednesday February 22nd regarding the potential freezing rain and wind speeds prior to the storm. Appendix A depicts the Special Weather Statement from Environment Canada and the High Wind Watch from the National Weather Service. All arrangements for standby were made before the storm began. CNPI had a normal complement on-call during the daytime on February 23rd, 2023, with the ability to call in additional crews if required. CNPI hired Hyline Utility to provide two crews on standby ready to work from Tuesday February 21st to Wednesday February 22nd, but they were not utilized. On February 22nd and 23rd, a freezing rain and wind storm hit the CNPI service territory. Wind gusts of up to 66 kmph caused trees covered with ice to fall onto and damage CNPI line infrastructure, which resulted in outages. The ice accumulation on CNPI's equipment and lines were over 25mm thick in our southern service territory and 12mm thick in our northern service territory. The broken trees, conductors, and other equipment delayed the power restoration significantly. Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 11968 39 19 No No Others No Yes Yes Additional comments: Throughout the course of the event, and shortly after completing restorations, key CNPI personnel were in regular communication to discuss challenges CNPI and successes in managing all facets of the restoration efforts. This helps und Cornwall Street Railway Light and Power Company Limited Cornwall Street Railway Light and Power Company Limited 2023 2023-06-05T12:49:22 2023-04-05T00:00:00 12:32 PM Yes Cornwall Electric thoroughly monitors Environment Canada notices to proactively identify and prepare for potential emergency outage restoration efforts. On April 4, Environment Canada issued a freezing rain warning, outlining the potential for a significant storm affecting eastern Ontario. On April 5, prior to the weather event, CE Management prepared for the event by assessing internal resources, materials, etc. and securing additional external resources. These resources were retained as part of the restoration efforts. All arrangements for standby/on-call were made before the storm began. CE secured internal resources. Since the majority of the outages occurred during daily-light hours – Assessors were sent out to assess the damage early – to determine the resources required to safely restore power in a timely manner – and determine if sufficient mutual assistance secured. Just after noon on Wednesday April 5, 2023, Cornwall Electric began to experience outages caused by severe weather affecting much of Southern and Eastern Ontario and Quebec. Severe thunderstorms and freezing rain impacted Cornwall directly, while tornado warnings were issued for other parts of the province. Large branches fell on power lines as a result of the significant ice accumulation, with the early budding on birch & soft maple trees increasing the ice accumulation. CE’s crews worked overnight to restore power to the majority of customers, however the full restoration efforts lasted until April 7, being further encumbered by flooding occurring on April 6. Throughout the restoration efforts, CE issued numerous updates via its social media and website as well as remained in contact with the City, Townships and Mohawk Council. The website notices also included information for Cornwall residents from local authorities regarding the availability of warming centres. CNPI, EOP, and other contracted services such as OLC, Spark Power and equipment from T&T (ie: bucket truck). Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 16929 65.8000030517578 12 No Yes No further action is required at this time No Yes No CE found that its frequent communications via social media and contact with the City, Townships and Mohawk Council were helpful in maintaining customers’ awareness of the restoration efforts and other critical information. CE also found the use of a Comma E.L.K. Energy Inc. E.L.K. Energy Inc. 2023 2023-04-21T11:50:58 2023-02-22T00:00:00 5:00 PM Yes Yes. Environment Canada issue Winter Storm Watch for majority of areas in Southwestern Ontario. On February 21st, Environment Canada changed from Winter Storm Watch to Freezing Rain Warning. On February 22nd, Environment Canada issued Freezing Rain Warning for Windsor-Essex region. Yes, E.L.K. had the regular on-call staff that responded to the initial power outage calls. As a result of adverse weather warnings issued by Environment Canada, there were additional E.L.K. crews on standby and responded immediately after the first outage reports. Additional, E.L.K. had local pole line contractor on stand by and were deployed on February 23rd. There were two main contributing cause of the Major Event i.e., Adverse Weather – Tree Contact and Adverse Weather – Equipment Breakage. The storm caused the ice to be accumulated on the trees, power lines and equipment. As a result of the heavy ice accumulation, the trees and tree branches broke and fell on the power lines. The ice accumulation on power line caused equipment breakage that resulted in downed power lines. It took E.L.K. approximately 27 hours to restore power to 90% of customers interrupted (not related to Loss of Supply) It took a total of approximately 48 hours to restore power to 90% of customer interrupted (included Loss of Supply) Adverse Weather-Freezing rain/Ice storm No, used fixed percentage (i.e., 10% of customers affected) Yes 3077 24 27 Yes No Others Yes Yes Yes E.L.K. has had discussion internal and with its Board regarding the improvements and mitigation plans for future major events. These ongoing investments and discussions are as follows: • Dedicated inventory supply available for Major Events • Obtain membe E.L.K. Energy Inc. E.L.K. Energy Inc. 2023 2023-09-22T11:11:10 2023-07-26T00:00:00 4:15 PM Yes Yes, Environment Canada issued a severe thunderstorm warning for the southwestern region of Canada, effective from late afternoon through the evening of July 26th. In addition to the thunderstorm alert, Environment Canada also issued warnings for potential tornadoes, damaging wind gusts, heavy rainfall, and the possibility of hail. Yes, E.L.K.'s standard on-call personnel promptly addressed the initial power outage reports. After conducting their initial assessments, E.L.K. efficiently divided the crews into two shifts, enabling the restoration work to proceed continuously throughout the day and night. Recognizing the scope of the situation from their initial evaluation, E.L.K. acted immediately to initiate the activation of the Ontario Mutual Assistance Program (OnMAG), reaching out to neighboring utility companies to secure additional assistance. The Major Event's primary factors contributing to its occurrence were the Adverse Weather conditions, Loss of Supply, and Tree Contacts. According to reports from Environment Canada, wind gusts reached speeds of up to 91km/h, resulting in significant damage to utility poles. The high winds led to the breakage of tree branches from nearby trees, which then fell onto power lines. In certain cases, large trees were uprooted, collapsing onto the power lines and causing extensive damage to the electrical infrastructure. During the Major Event, a total of 5,028 customers experienced interruptions. E.L.K. serves a customer base totaling 12,101 individuals, and the Major Event accounted for approximately 41% of these interruptions, resulting from various factors such as Loss of Supply, Adverse Weather, or Tree Contact. It took E.L.K. approximately 38 hours to restore power to 90% of customers interrupted. In the earlier part of 2023, E.L.K. joined the Ontario Mutual Assistance Program (OnMAG). As soon as the initial outage call came in, E.L.K. took immediate action, activating OnMAG within one hour to seek assistance from fellow utility providers. During t Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 5028 41 38 Yes Yes System upgrades No Yes Yes Before the onset of this Major Event, E.L.K. had a pre-existing plan to implement auto reclosers in communities receiving dual feeds from Hydro One, namely Essex and Harrow. E.L.K. had taken proactive steps by placing an order for these auto reclosers. On Elexicon Energy Inc. Elexicon Energy Inc. 2023 2023-02-02T09:04:29 2022-12-03T00:00:00 11:22 AM Yes Elexicon Energy only had a standard public safety weather warning. These are not aimed at or equipped to inform impacts to the distribution system. There were extra employees put on Standby for that weekend. 2 extra employees in Whitby as well as 2 extra employees in Belleville. All districts were advised to ensure staff was prepared to respond to higher call volumes. Forestry crews were also put in place on standby for possible wind/tree contact issues. A high winds event caused a loss of supply to our Newcastle customer base. Given that the impacted device was an asset owned by Hydro One Networks Inc., Elexicon Energy had limited control in restoring customers in a more timely fashion. 5.5% of the total customer base were interrupted and it took 9 hours, 28 minutes to restore 90% of the customers who were interrupted. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 9727 6 9 Yes No Others No Yes Yes The Control centre researched alternative power restoration paths to increase flexibility, reliability and redundancy. This work was passed on to the field operations team who did a field visit to validate and clarify the findings. Hydro One owns most of Elexicon Energy Inc. Elexicon Energy Inc. 2023 2023-02-15T09:49:31 2022-12-23T00:00:00 09:45 am Yes Public advisory weather warnings. Typically, these are public safety reports that are not reliable for operating a distribution network. Staffing was arranged to maximize working hours according to region to ensure Elexicon Energy could provide a 24/7 response. An historic winter storm including blizzards, high winds and snowfall swept through the region from December 23rd to 25th causing widespread outages. High winds brought down trees and power lines resulting in damage to critical infrastructure. 30 hours, 4 minutes Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 52334 30 30 Yes No No further action is required at this time No Yes Yes Elexicon Energy Inc. Elexicon Energy Inc. 2023 2023-03-20T15:43:47 2023-01-25T00:00:00 03:52 PM Yes Elexicon Energy only had a standard public safety weather warning. These are not aimed at or equipped to inform impacts to the distribution system. Additional crews were scheduled to be on stand-by. An incident management structure was initiated to continually monitor and assess for operational needs and public communications A snowstorm swept through the region with winds gusts and heavy snowfall resulting in power outages. Heavy snow fall accumulation between 15 to 20cm during rush hour traffic. The timing of the storm complicated matters. Unplowed roads at rush hour traffic restricted the movement of crews and our ability to restore customers. Interrupted customers represent 7.6% of the Distributor's total customer base. It took 5 hours, 20 minutes to restore 90% of the customers who were interrupted. Adverse Weather-Snow Yes, used IEEE Standard 1366 Yes 13330 7.59999990463257 5 No No No further action is required at this time No Yes Yes Entegrus Powerlines Inc. Entegrus Powerlines Inc. 2023 2023-04-21T16:12:25 2023-02-22T00:00:00 6:15 PM Yes Yes. Environment Canada issued a Winter Storm Watch for certain locations within Southwestern Ontario (including Chatham-Kent) one day before the first outage. On February 21, 2023, at 6:09 pm, Environment Canada replaced the Winter Storm Watch with a Freezing Rain Warning. Subsequently, on February 22, 2023, at 4:15 am, Environment Canada issued a Freezing Rain Warning for Chatham-Kent indicating that “extensive utility outages are possible due to the combination of ice accretion and moderate winds”. The boundaries of the EPI service territory stretch from Wheatley in the southwest to Parkhill in the northeast. The boundaries are non-contiguous, and the distance across the Entegrus service territory is approximately two hours travel time by vehicle. Accordingly, Entegrus operates two operational centres, one in the Entegrus southwest region (located in Chatham) and another in the Entegrus northeast region (located in St. Thomas). As described in question #1 above, Entegrus had prior warning about the storm. The event occurred after business hours, and as such Entegrus had on-call staff ready to respond and other staff on standby. Entegrus contacted vegetation contractors and had them on standby prior to the storm. Entegrus also participated in multiple conversations with its mutual aid group ONMAG prior to the storm. Restoration efforts continued after-hours throughout the evening of February 22 into the afternoon of February 24, 2023. The main contributing cause of the Major Event was “Adverse Weather – Freezing Rain”. The storm resulted in numerous tree limbs falling and making contact with infrastructure. This resulted in broken poles, downed lines, and faults. Yes. Entegrus maintains third party mutual assistance agreements for restoration efforts, including membership in the Ontario Mutual Assistance Program (“OnMAG”). Entegrus contacted Bluewater Power and London Hydro for restoration assistance. Bluewater Po Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 13395 21 23 Yes Yes Others No Yes Yes Entegrus conducted a debriefing after the conclusion of the Major Event, which reinforced the benefits of recent and ongoing Distribution System Plan investments in mitigating additional storm outages that may have otherwise been experienced. These recent Entegrus Powerlines Inc. Entegrus Powerlines Inc. 2023 2023-04-26T15:59:10 2023-02-27T00:00:00 4:09 PM Yes On February 26, 2023, at 12:06 am, Environment Canada issued a Special Weather Statement for certain locations within Southwestern Ontario (including Chatham-Kent) for February 27, 2023. On February 27, 2023, at 5:43 am, Environment Canada replaced the Winter Storm Watch with a Freezing Rain Warning. The boundaries of the EPI service territory stretch from Wheatley in the southwest to Parkhill in the northeast. The boundaries are non-contiguous, and the distance across the Entegrus service territory is approximately two hours travel time by vehicle. Accordingly, Entegrus operates two operational centres, one in the Entegrus southwest region (located in Chatham) and another in the Entegrus northeast region (located in St. Thomas). As described in question #1 above, Entegrus had prior warning about the storm. The event occurred after business hours, and as such Entegrus had on-call staff ready to respond and other staff on standby. Restoration efforts continued after-hours throughout the evening of February 27th. The main contributing causes of the Major Event were “Adverse Weather – Freezing Rain” and “Adverse Weather – Wind”. The storm resulted in tree limbs falling and making contact with infrastructure. This resulted in damage to Entegrus infrastructure. Entegrus serves approximately 63,000 customers. During the Major Event on the evening of February 27, 2023, there were 4,560 customers interrupted (unrelated to Loss of Supply), representing approximately 7% of Entegrus customers. See #7 below for additional details regarding Loss of Supply from this storm. Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 4560 7 5 Yes No Others No Yes Yes Entegrus conducted a debriefing after the conclusion of the Major Event, which reinforced the benefits of recent and ongoing Distribution System Plan investments in mitigating additional storm outages that may have otherwise been experienced. These recent Entegrus Powerlines Inc. Entegrus Powerlines Inc. 2023 2023-10-10T09:24:27 2023-07-26T00:00:00 4:30 PM Yes Yes. On July 26, 2023, at 1:14 pm, Environment Canada issued a Severe Thunderstorm Watch for certain locations within Southwestern Ontario (including Chatham-Kent) for July 26, 2023. On July 26, 2023 at 4:00 pm, Environment Canada replaced the Severe Thunderstorm Watch with a Severe Thunderstorm Warning. The boundaries of the EPI service territory stretch from Wheatley in the southwest to Parkhill in the northeast. The boundaries are non-contiguous, and the distance across the Entegrus service territory is approximately two hours travel time by vehicle. Accordingly, Entegrus operates two operational centres, one in the Entegrus southwest region (located in Chatham) and another in the Entegrus northeast region (located in St. Thomas). As described in question #1 above, Entegrus had prior warning about the storm. The event occurred after business hours, and as such Entegrus had on-call staff ready to respond and other staff on standby. Restoration efforts continued after-hours throughout the evening of July 27th. The main contributing causes of the Major Event were “Tree Contact from Adverse Weather” and “Lightning”. The storm resulted in tree limbs falling and making contact with infrastructure as well as lightning strikes which further damaged Entegrus’ infrastructure. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 2262 4 20 Yes No No further action is required at this time No Yes Yes Entegrus conducted a debriefing after the conclusion of the Major Event, which reinforced the benefits of recent and ongoing Distribution System Plan investments in mitigating additional storm outages that may have otherwise been experienced. These recent Entegrus Powerlines Inc. Entegrus Powerlines Inc. 2023 2023-10-20T10:02:10 2023-08-24T00:00:00 11:00 PM Yes Yes. On August 22, 2023, at 1:03 pm, Environment Canada issued a multi-day Severe Thunderstorm Warning for certain locations within Southwestern Ontario (including Chatham-Kent) for August 23 - August 24, 2023. On August 24, 2023 at 10:59 pm, Environment Canada replaced the Severe Thunderstorm Warning with a Tornado Warning. The boundaries of the EPI service territory stretch from Wheatley in the southwest to Parkhill in the northeast. The boundaries are non-contiguous, and the distance across the Entegrus service territory is approximately two hours travel time by vehicle. Accordingly, Entegrus operates two operational centres, one in the Entegrus southwest region (located in Chatham) and another in the Entegrus northeast region (located in St. Thomas). As described in question #1 above, Entegrus had prior warning about the storm. The event occurred after business hours, and as such Entegrus had on-call staff ready to respond and other staff on standby. Restoration efforts continued after-hours throughout the afternoon of August 28, 2023. The main contributing causes of the Major Event were “Tree Contact from Adverse Weather” and “Equipment Breakage from Adverse Weather”. The storm resulted in tree limbs falling and making contact with infrastructure as well as equipment breakage. Yes. Entegrus maintains third party mutual assistance agreements for restoration efforts, including membership in the Ontario Mutual Assistance Program (“OnMAG”). Entegrus contacted Bluewater Power for restoration assistance. Bluewater arrived the morning Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 20755 33 16 Yes Yes No further action is required at this time No Yes Yes Entegrus conducted a debriefing after the conclusion of the Major Event, which reinforced the benefits of recent and ongoing Distribution System Plan investments in mitigating additional storm outages that may have otherwise been experienced. These recent ENWIN Utilities Ltd. ENWIN Utilities Ltd. 2023 2023-04-21T10:18:16 2023-02-22T00:00:00 2:15 PM Yes Local media and Environment Canada had issued warnings and news coverage of the potential of a freezing rain event. The first outages caused by the freezing rain event started at approximately 2:00 pm during a regular weekday. Full staffing was working at the onset of the storm. There were several small outages at the onset of the storm, which were dealt with by staff that had arrived for their afternoon shift, and staff that had been carried over from their day shift. These outages were restored between 5:00 pm and 6:00 pm. Between 6:00 pm and 7:00 pm, the storm began to create many widespread outages. Once the event was creating widespread power outages, more staff were called in and mobilized to provide power restoration. Management simultaneously made arrangements to have crews working shifts to enable 24-hour storm restoration efforts. Shifts of crews worked 24 hours per day beginning in the afternoon of February 22, 2023. All available line staff were engaged in power restoration until the last customer that could be re-connected, was re-connected. A freezing rain event impacted the entirety of the City of Windsor beginning in the afternoon of Wednesday, February 22, 2023, and continuing into the mid-morning of Thursday, February 23, 2023. The ice accumulation on lines, trees and structures caused numerous power outages from falling trees which downed powerlines. From the peak at 11:18 pm on February 22, 90% of that load was restored by 5:20 pm on February 23, 18 hours, 2 minutes after the peak outage occurred. Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 25595 27.3999996185303 18 No No System upgrades No Yes Yes The Major Event was caused by a multiple hour freezing rain event. ENWIN has made significant investments in system automation and remote operation that allow for remote reconfiguration of the distribution feeders in the event of an upset. These system au ENWIN Utilities Ltd. ENWIN Utilities Ltd. 2023 2023-10-23T13:20:37 2023-08-24T00:00:00 10:27 pm Yes Environment Canada had issued warnings in the late afternoon and evening of August 24, 2023, describing the potential of a storm with high winds and a risk of tornado activity. ENWIN was aware of the potential for approaching severe weather during the afternoon and evening of August 24, 2023. However, the Environment Canada warnings of a potential windstorm were received later in the evening, with the storm ultimately reaching Windsor at approximately 10:27 pm. Due to the timing of the weather alert and the uncertainty of potential impacts, ENWIN did not call-in additional employees to standby in advance of the storm. ENWIN regularly maintains an afternoon shift of a single bucket truck, and this crew was on shift the evening of August 24, 2023. This crew was immediately mobilized to assess the damage and address hazards during the weather event. As the scale of outages became evident shortly after the beginning of the storm, a call out for additional ENWIN line crews was executed. ENWIN management simultaneously scheduled field crews, system control, and supervisory staff to provide 24-hour storm restoration. Shifts of crews worked 24 hours per day beginning August 24, 2023. As noted below, approximately 90% of customers were restored in under 6 hours of the outage peak occurring. A significant summer storm was experienced in southwestern Ontario during the evening of August 24, 2023. The storm produced very high winds, which post-event, were determined to also include two separate tornado touch downs within ENWIN’s service territory. There were many incidents of fallen trees, broken poles and similar wind-driven damage throughout the City of Windsor. A peak of approximately 19,800 customers were without power. The outage peak occurred at approximately 12:30 am on August 25, 2023. At that point, approximately 19,800 customers were without power. By 6:15 am August 25, 2023, greater than 90% of the peak load loss had been restored. Essex Powerlines Corporation Assistance was also provided by a third-party line contractor, Black & McDonald. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 19800 21.2000007629395 6 No Yes System upgrades No No Yes "Process Improvements" also apply. The Major Event was caused by a storm with very high winds, which post-event, was determined to include two separate tornado touch downs within ENWIN’s service territory. ENWIN has invested in system automation/remote op GrandBridge Energy Inc. GrandBridge Energy Inc. 2023 2023-02-16T14:01:44 2022-12-23T00:00:00 7:44 AM Yes On December 20, 2022, Environment Climate Change Canada (ECCC) issued a Weather Briefing forecasting inclement weather on December 23-25, 2022. The storm was forecasted to affect all of southern Ontario and large portion of northern Ontario beginning Thursday, December 22 through to at least Saturday, December 24. The briefing included threats of significant snowfall, strong winds, blowing snow, rain as well as icing and cold temperatures. At the time of the briefing, there was a fair amount of uncertainty regarding specific timing and snow/rain/wind intensities. Regardless of these uncertainties, high impacts were expected to occur. GBE initiated emergency response preparation and advanced resource planning during the week of December 19th, 2022. On Thursday, December 22, GBE finalized the arrangements that ensured extra employees were available to respond from December 23 to 25, 2022. The main contributing cause of the Major Event was Adverse Weather (Cause Code 6). GBE experienced three (3) outages in North Dumfries and one (1) outage in Brantford, of which the largest outage was due to adverse weather with galloping lines in the town of Ayr. It took 7 hours and 30 minutes to restore power to 90% of customers impacted by the Major Event. Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 22315 20 7 Yes No System upgrades No Yes Yes • Incorporate Brantford’s distribution area into GBE’s public-facing Outage Map to provide Brantford customers with instant access to outage status information. • Continue deploying grid modernization technology (i.e. automated reclosers, fault indicators Hydro One Networks Inc. Hydro One Networks Inc. 2023 2023-02-06T11:54:45 2022-12-23T00:00:00 9:55 AM Yes The IBM Predication Software and Weather Monitoring tool indicated the potential for a significant event. N/A The main contributing causes of the Major Event were tree contacts and equipment failures. It took 111 hours and 14 minutes from the onset of the Major Event to restore 90% of the impacted customers. Cormorant Utility Service/Power Tel Dundas Power Line Durham High Voltage EPCOR Utilities Holland Power Services Iconic Power Systems K-Line North Bay Hydro Sault Ste. Marie PUC Sudbury PUC Sproule Powerline Construction T&T Power Valard Others No, used fixed percentage (i.e., 10% of customers affected) Yes 525000 35 111 Yes Yes Process improvements No Yes Yes A storm debrief meeting took place on January 6th, 2023, to identify lessons learned and develop recommendations. Hydro One Networks Inc. Hydro One Networks Inc. 2023 2023-02-06T11:55:17 2022-12-15T00:00:00 10:33 AM Yes The IBM Predication Software and Weather Monitoring tool indicated the potential for a significant event. N/A The main contributing causes of the Major Event were tree contacts and equipment failures. It took 82 hours and 34 minutes from the onset of the Major Event to restore 90% of the impacted customers. Durham High Voltage K-Line Ainsworth Iconic Lakefront Utilities North Bay Hydro Entegrus ERTH EPCOR Devries Power and Utility Sproule Powerline Construction Holland Power T&T Line Construction Vickers Power Line Kingston Utilities Others No, used fixed percentage (i.e., 10% of customers affected) Yes 232000 16 82 Yes Yes Process improvements No Yes Yes A storm debrief meeting took place on January 6th, 2023 to identify lessons learned and develop recommendations. Hydro One Networks Inc. Hydro One Networks Inc. 2023 2023-05-16T10:20:48 2023-02-22T00:00:00 3:02 AM Yes The IBM Predication Software and Weather Monitoring tool indicated the potential for a significant event. Ahead of the February 22nd weather system, Dx System Control developed a staffing readiness plan for Control Room resources over the February 22nd to 24th period. Discussions were held with Dx Lines (Southern region) on a preparedness strategy. Southern region held three calls in advance of the event, which included forestry, transmission lines, support staff, damage assessors and logistics representatives. The plan was to increase additional crews on call for Wednesday evening and Thursday night in Southern region to respond to any events in those projected impact areas. No internal crew movement was required. n/a It took 86 hours to restore 90% of the 99,000 customers impacted. Ainsworth Bluewater Power EPCOR ERTH Power EPCOR Utilities Hannon Electric Highline Holland Iconic K-Line K Line – Barrie K Line – Hamilton Lakeland Power London Hydro Milton Hydro Valard Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 Yes 46000 7 86 Yes Yes Process improvements No Yes Yes The emergency management program in collaboration with many lines of business at the company continuously work toward improving preparedness and mitigation techniques to improve response. Additional training on emergency-response roles and functions is be Hydro One Networks Inc. Hydro One Networks Inc. 2023 2023-06-06T13:38:07 2023-04-05T00:00:00 2:30 AM Yes The IBM Predication Software and Weather Monitoring tool indicated the potential for a significant event. Preparations and mobilization began ahead of the weather system on April 4th. Distribution Lines resources were allocated within the Northwest zone, and sixty resources from the south were dispatched to an area bordering the Central and Northeast zones. Damage assessors, forestry crews, and field business centre staff were briefed and readied for mobilization as the storm unfolded. Helicopter and Fleet staff and equipment were on standby, with contractors notified of potential support requirements. N/A It took 70 hours and 16 minutes from the onset of the Major Event to restore 90% of the 394,000 customers impacted. Local Distribution Company (LDC) Lakefront Utilities Lakeland Power Epcor Kingston PUC North Bat Hydro Bluewater Power Oakville Hydro Toronto Hydro Alectra Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 359000 27 70 Yes Yes Others No Yes Yes Hydro One will continue to reinforce emergency management and response roles, processes, and procedures, to prepare our staff to fill emergency response roles across the company. Following the storm, a lessons learned exercise was held, with post incident Hydro Ottawa Limited Hydro Ottawa Limited 2023 2023-02-10T08:37:23 2022-12-23T00:00:00 1:01 AM Yes Environment Canada issued a Special Weather Statement on December 19th, 2022 at approximately 16:00, a Winter Storm Watch on December 21, 2022 at approximately 15:00 and a Winter Storm Warning on December 22nd, 2022 at approximately 15:00. Once Environment Canada issued the Winter Warning Watch, all Hydro Ottawa Operations employees were contacted for availability. All available Line staff and underground staff were instructed to report into their work location on December 23rd, 2022 at 6:00. All On-Call staff were instructed to report in on December 22nd, 2022 at 18:00 in preparation for the event as well as the Incident Command Centre was stood up at the same time. On December 23rd at 1:01AM Hydro One S7M circuit and Cambrian's T1 transfer tripped which resulting in a loss of supply to four Hydro Ottawa substations which led to 31,897 Hydro Ottawa customer outages. Loss of Supply Yes, used IEEE Standard 1366 Yes 67710 19 12 Yes No Process improvements No Yes Yes A debrief is being conducted and findings will be actioned to ensure Hydro Ottawa continues to be prepared for such events Hydro Ottawa Limited Hydro Ottawa Limited 2023 2023-05-11T12:57:44 2023-04-05T00:00:00 10:54 AM Yes Environment Canada issued a Special Weather Statement on April 4th, 2023 stating prolonged freezing rain leading to 10 to 15 millimeters of ice accretion was forecasted. Hydro Ottawa had all of its employees on standby and on-site during the onset of the event. In addition, Hydro Ottawa had a full complement of on-shift personnel, a full on-call roster of field technicians and management personnel working overnight. On April 5th at 7:26 PM, Hydro One M31A transfer tripped. Which resulted in a loss of supply to two Hydro Ottawa substations leading to 25,303 Hydro Ottawa customer outages. 163,448 customers were interrupted during the Major Event, representing 45% of Hydro Ottawa’s total customer base. Burlington Hydro, London Hydro, ERTH Power Loss of Supply Yes, used IEEE Standard 1366 Yes 163448 45 40 Yes Yes Process improvements No Yes Yes Hydro Ottawa will conduct a debrief to discuss lessons learned from the Major Event. Process improvements from those lessons learned will be implemented for future major events. Hydro Ottawa Limited Hydro Ottawa Limited 2023 2023-08-24T15:16:36 2023-06-26T00:00:00 3:40 PM Yes Thunderstorms were forecasted; however, the severity of the lightning exceeded what was expected. Hydro Ottawa had all of its employees on standby and on-site during the onset of the event. In addition, Hydro Ottawa had a full complement of on-shift personnel, a full on-call roster of field technicians and management personnel working overnight. On June 26, 2023 there was a thunderstorm and lightning event that caused some significant outages: 1) 48M2 breaker auto re-closed at the Hawthorne TS station. The Blue phase switch was open with pitting due to lightning. 7241 customers were interrupted. 2) TB06 breaker failure due to a lightning strike which tripped the Y bus at the Russell TS station. 2363 customers were impacted. 3) UX02 and UX05 breakers tripped at the Gladstone station due to fallen trees from the thunderstorm event. 1266 customers were affected. Lightning Yes, used IEEE Standard 1366 Yes 15413 96 6 Yes No Process improvements No Yes No Hydro Ottawa is undertaking a full review/update of its Electricity Emergency Response Plan. Hydro Ottawa Limited Hydro Ottawa Limited 2023 2023-09-27T11:48:02 2023-07-28T00:00:00 1:22 PM Yes Thunderstorms were forecasted, however the severity of the storm exceeded what was expected. In the challenging scenario of a labour disruption, Hydro Ottawa took specific measures to ensure staff readiness and on-call staff and contractors were on stand-by. On July 28, 2023, there was a hailstorm event that caused some significant outages: i) A circuit breaker tripped at the Lincoln Heights TD substation due to fallen trees on overhead primary conductor infrastructure. 2,261 customers were affected. ii) A circuit breaker tripped at the Lincoln Heights TD substation as extreme winds knocked down a tree branch onto an overhead primary conductor segment. 1763 customers were interrupted. iii) Downed primary conductor segments at multiple locations on a circuit tied to the Woodroffe TW substation. 1535 customers were impacted. 92.3% of the interrupted customers (34,906) were restored by 4:15 AM on 29th July, 2023. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 37821 10.4062995910645 15 Yes No Others No Yes Yes Review of emergency response processes during the labour disruption. Kingston Hydro Corporation Kingston Hydro Corporation 2023 2023-02-16T12:54:57 2022-12-24T00:00:00 00:55 AM Yes Called employees as required. The main cause of the Major Event is the Adverse Environment, specifically a winter storm. A powerful winter storm swept across eastern Ontario in the days leading up to Christmas. The high winds and heavy snow caused a total of 11,874 customer-hours of interruptions in Kingston Hydro service territory on December 24th, 2022. Others Yes, used IEEE Standard 1366 Yes 5128 18.3999996185303 20 No No Process improvements No No Yes Debriefed with staff looking for improvements. We discussed sharing the spread sheet real time that the Operations Centre uses to keep track of locations with field crews so they can see and enter comments with their iPads. Lakeland Power Distribution Ltd. Lakeland Power Distribution Ltd. 2023 2023-01-13T16:39:20 2022-12-23T00:00:00 10:50 pm Yes Lakeland participated in storm preparation calls with OnMAG (Ontario Mutual Assistance Group). These were situational calls to discuss how LDC's in the province were preparing for this province wide storm. Employes, contractors and tree trimming contractors. Province wide snowstorm - loss of supply/adverse weather The amount of snowfall in a such a short period of time made most roads in our area impassable for an extended period of time which impeded our efforts in assessing damage, reaching lines that were down and customers that were out. Loss of Supply Yes, used IEEE Standard 1366 Yes 9779 68 27 Yes No Others No Yes Yes Lakeland is a member of OnMAG and participate in quarterly meetings to discuss future storm assistance. London Hydro Inc. London Hydro Inc. 2023 2023-07-25T13:21:38 2023-06-02T00:00:00 10:40 AM No N/A On Friday, June 2nd at 10:40am a truck struck and broke a hydro pole that was installed far away from the curb, behind a sidewalk, exceeding minimum clearance requirements. This caused an outage to 12,613 customers across two main feeders as this pole location was a tie point between both feeders. Furthermore, the customer count on the impacted feeders was higher than normal as the system was abnormally configured due to a construction process occurring on another feeder. Due to the varying unclear reports received of the incident, London Hydro crews had to get eyes on the scene to understand the exact damage and nature of the work required. Additionally, there was a critical customer adjacent to the accident location, a hospital, which had both of its power supplies affected due to this outage. Recognizing the complexity of the situation, London Hydro needed to determine a holistic plan and procedure that would allow for the safe restoration of power to all in a timely manner. The major event started at 10:40am on June 2nd, and over 90% of customers were restored by 12:41pm on June 2nd. Others Yes, used IEEE Standard 1366 Yes 12613 8 2 No No Others No London Hydro performs post event analysis following each Major Event in order to identify points of strength and areas for improvement. For the critical customer adjacent to this accident location, we are evaluating various options to improve reliability, London Hydro Inc. London Hydro Inc. 2023 2023-09-13T11:00:35 2023-07-20T00:00:00 05:08 PM Yes Environment Canada issued a severe thunderstorm warning for the London area. London Hydro did have extra London Hydro employees on duty during the storm. London Hydro did bring in additional contractors to assist in restoration activities during the storm. Severe thunderstorms, accompanied by high winds and heavy rain, passed through London Hydro's distribution area on July 20, 2023 at around 5:08pm. The resulting high wind from the storm knocked down several trees throughout the region that damaged various hydro poles and power lines. The major event started at 5:08pm on July 20th, and over 90% of customers were restored by 1:15am on July 21st. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 14616 9 8 No No Others No Yes No London Hydro has an Emergency Procedures Plan; training and mockups are performed annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of extensive damage to London Hydro Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2023 2023-02-06T09:49:40 2022-12-23T00:00:00 12:44 PM Yes A massive cross-country winter storm was forecasted. Environment Canada predicted winds up to 100 kilometers per hour in many parts of Ontario Additional staff and crew members were on standby preparing to respond to possible power outages that may occur during the major winter storm. On December 23, 2022, a major winter storm hit Ontario, bringing heavy snowfall and strong winds causing power outages across the province. A total of 11 outages occurred in all NT Power service areas during the Major Event. The first outage was on December 23, 2023, at 12:44 PM, and the last outage was on December 24, 2023, at 6:00 AM. All outages were restored by 10:31 AM on December 24, 2022. Eleven outages occurred during the Major Event, and each outage was restored at various stages. The longest power outage lasted for 4.51 hours and affected 57 customers. Adverse Weather-Wind No, used fixed percentage (i.e., 10% of customers affected) Yes 8132 18.1000003814697 4 Yes No No further action is required at this time No Yes Yes Major Event was due to adverse weather conditions; therefore, no further action is required by NT Power at this time. Niagara Peninsula Energy Inc. Niagara Peninsula Energy Inc. 2023 2023-02-10T08:56:35 2022-12-23T00:00:00 08:46 AM Yes Yes, a special weather statement was issued by Environment Canada on Monday December 19th for the remainder of the week into the weekend, advising of the potential for a winter storm. A Blizzard warning was then issued on December 22nd warning of flash freezing, sustained wind gusts of between 100 and 120 km/h combined with from 15 to 30 cm of snow. Yes, Niagara Peninsula Energy Inc. (“NPEI”) always has staff on-call during the evenings and weekends. Due to the weather statements, NPEI arranged to have extra employees on standby for December 23rd and December 24th. A severe wind storm impacted NPEI’s service territory on December 23rd, 2022, with wind gusts exceeding 115 km/h. The wind levels stayed in the range of between 60 & 70 km/h sustained with gusts approaching 115 km/h from approximately 09:00 on December 23rd until mid-day on Dec. 24th.The storm resulted in downed wires, fallen trees and flying debris, which caused significant outages. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 7535 12.7799997329712 15 No No Process improvements No Yes Yes NPEI is reviewing the Major Event response to identify potential process improvements as well as reviewing the performance of our tree trimming program to identify areas of improvement. Oakville Hydro Electricity Distribution Inc. Oakville Hydro Electricity Distribution Inc. 2023 2023-08-09T17:13:58 2023-06-30T00:00:00 12:15 PM No Although Oakville Hydro could not foresee or predict the impending event, announcements to the public were made following the event via social media channels (such as Twitter and our Outage Map). Employees are trained through Oakville Hydro’s Business Continuity Plan which requires a regular review of Enterprise Critical Functions (ECF) in each department. Potential interruptions (storms, pandemics, access to facilities etc.) to these ECF’s are identified and mitigation plans developed to lessen the impacts. Each department is required to complete a unit test of their plan yearly. Oakville Hydro also has an Emergency Operations Plan (EOP) in place that is continually updated and used as part of its Business Continuity Planning exercises. As part of its Business Continuity Planning, Oakville Hydro conducts a major mock disaster test on an annual basis testing each area’s preparedness. On June 30th, 2023 around 12:15pm, a crane came in contact with one of our power lines during construction activities. This led to a major power outage between Dundas Street West to Highway 403 and between Trafalgar Road and Bronte Road. Crews responded immediately to the outage, ensuring worker and public safety, and begun restoring power. The event was unforeseeable, unpredictable, unpreventable, and unavoidable as it was “Beyond the control of the distributor”. 2 hours, 38 minutes to restore over 90% of the customers Others Yes, used IEEE Standard 1366 Yes 12318 16 3 No No No further action is required at this time No The actions of a third-party during construction activities are difficult to constantly supervise and impossible to predict when designing the system. The event has been thoroughly reviewed by Oakville Hydro’s Engineering & Planning teams and determined t Orangeville Hydro Limited Orangeville Hydro Limited 2023 2023-02-22T16:13:36 2022-12-23T00:00:00 11:18 AM Yes Environment Canada warned of a significant winter storm set to hit much of Ontario. On-call staff and contractors were available. The main contributing causes of the Major Event were high sustained winds straining overhead infrastructure. There were two separate outages related to this major event. It took ~3 hours to restore power for the first large outage. It took ~4 hours for the second large outage. Ontario High Voltage Ltd. (a contractor) provided the assistance. Due to the blizzard conditions and road closures, other LDC’s were not available during the outage periods. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 5400 42 4 No Yes Process improvements No Yes Yes Additional staff training, process improvements, and system upgrades are examples of actions that are being taken. Storm debriefings occurred at following Board meetings, management discussions, and operational meetings. Specific material will no longer b PUC Distribution Inc. PUC Distribution Inc. 2023 2023-05-08T09:25:48 2023-04-05T00:00:00 02:08 Yes Yes, PUC Distribution received weather warnings for rain and possible lightning. Yes, Additional staff on placed Standby. Line Department and Management staff are standby 24 hours a day, 7 days a week. We added additional Line Department Staff on standby. The Electric System Operator and Substation Electricians were also added on standby. A lightning strike initiated a trip on one 12.47kV feeder and simultaneously struck a sky wire owned by a neighbouring Utility that fell on the 34.5kV Sub Transmission line that knocked out power to two additional Distribution Substations. Lightning on April 5th is consistent with the OEB definition of “Major Event” (as set out in Section 2.1.4.2 of the OEB’s Electrical Reporting and Record Keeping Requirements). Approximately 5 hours and 35 minutes to restore 90% of our affected customers. Lightning Yes, used IEEE Standard 1366 No 5984 17.5 5 No No Additional staff training No Yes No Post outage review meetings are held after any major event outage as part of an ongoing action plan to improve outage times and staff proficiency. Wasaga Distribution Inc. Wasaga Distribution Inc. 2023 2023-02-21T11:11:43 2022-12-23T00:00:00 16:38 PM Yes WDI was aware that a winter storm warning had been issued by Environment Canada. Snow began during the afternoon of December 23rd. Field staff and management were aware that additional assistance may be required. The Ontario Energy Board has defined a Major Event as: “Major Event” is defined as an event that is beyond the control of the distributor and is: a) Unforeseeable; b) Unpredictable; c) Unpreventable; or d) Unavoidable. This outage was outside the control of the distributor and was both unavoidable and unpreventable. N/A Adverse Weather-Snow Yes, used IEEE Standard 1366 No 7049 47.2999992370605 2 Yes No Others No Yes No Wasaga Distribution has: • implemented an aggressive capital replacement strategy for the coming years, to replace dated and underclassed equipment. • noted that our tree-trimming strategy needs to be reviewed in the coming year. Wellington North Power Inc. Wellington North Power Inc. 2023 2023-03-02T12:38:43 2023-02-17T00:00:00 5:53 AM No 44kV supply feed from Hydro One’s Palmerston Transmission station was interrupted resulting in a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). During the Loss of Supply, a large section of Mount Forest (WNP’s service territory) was without power. For 90% of customers, power was restored to Mount Forest at 8:29 am on February 17, 2023. Outage was 2.60 hours (156 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 1724 42 3 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Hydro One Integrated System Operating Centre (ISOC). Wellington North Power Inc. Wellington North Power Inc. 2023 2023-09-01T09:38:43 2023-08-03T00:00:00 9:31 PM No 44kV supply feed from Hydro One’s Hanover Transmission station was interrupted resulting in a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). During the Loss of Supply, all of Holstein and a large section of Mount Forest (WNP’s service territory) was without power. The cause was damaged Hydro One equipment – a broken cross-arm and a broken insulator near Neustadt affecting the 44kV supply. For 90% of customers, power was restored to all of Holstein and Mount Forest at 1:35 am on August 4, 2023. Outage was 4.03 hours (242 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 1635 40 4 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Hydro One Integrated System Operating Centre (ISOC). Wellington North Power Inc. Wellington North Power Inc. 2023 2023-12-05T12:29:16 2023-11-13T00:00:00 7:47 pm No The cause of interruption was Cause Code 2: Loss of Supply. 44kV supply feed from Hydro One’s Palmerston Transmission station was interrupted resulting in a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). During the Loss of Supply, a large section (east-side) of Mount Forest (WNP’s service territory) was without power. For 90% of customers, power was restored to Mount Forest at approx. 10:11 pm on November 13, 2023. Outage was 2.40 hours (144 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 1749 41 2 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Hydro One Integrated System Operating Centre (ISOC). Alectra Utilities Corporation Alectra Utilities Corporation 2022 2022-01-26T15:00:09 2021-12-11T00:00:00 13:00 Yes Environment Canada issued a wind warning for most of southern Ontario. In anticipation of the adverse weather event, additional staff were made available on December 11, 2021. Additionally, Alectra’s communications team continuously prepares for emergency situations. A full staff complement from the communications and government relations team were made aware of the incoming weather system and were asked to charge devices and remain on standby in the case of an event. Additional Comments for Item #3: Alectra informed customers of imminent adverse weather conditions based on information from Environment Canada. Information about the special weather statement and associated emergency preparedness messages were communicated to customers via social media channels (Twitter, Facebook and Instagram). The messages included emergency preparedness information from Alectra’s website and YouTube videos illustrating important safety messages. Additional Comments for Item #4: Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its operational areas. The Emergency Plan is based on the Incident Management System (“IMS”) and requires training exercises to be conducted on an annual basis. Each exercise must be debriefed and critiqued, and a brief written summary of the debriefing is distributed to all staff participating in the exercise. Training of Alectra Utilities system controllers (and others, as required) is performed on an ongoing basis, and continual review of the Emergency Plan is completed. On December 11, 2021, high winds and rain caused trees to fall on primary circuits across the entire Alectra’s service territory. Long duration outages resulted, as trees were cleared, and overhead circuits were repaired. Approximately 7 hours. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 86128 7.90000009536743 7 Yes No No further action is required at this time No Yes Yes Alectra Utilities Corporation Alectra Utilities Corporation 2022 2022-06-06T17:21:07 2022-04-15T00:00:00 12:48 PM Yes Environment and Climate Change Canada issued a wind warning, which initially anticipated wind gusts of 80 km/hour. As the afternoon progressed, Environment and Climate Change Canada revised the warning to predict wind gusts of 90 km/hour. The website, “The Weather Network” later indicated, St. Catharines experienced wind gusts of 123 km/hour, which is equivalent to the strength of a Category 1 hurricane. In anticipation of the adverse weather event, additional staff were made available on April 15, 2022. Alectra’s communications team continuously prepares for emergencies. Full staff complements from the communications and government relations team were made aware of the incoming weather system and were asked to charge devices and remain on standby in the case of an event. Additional Comments for Q3: Alectra’s communications teams continuously informs customers how to prepare for major events. Messages include how to prepare a 72-hour emergency preparedness kit, what to do before, during, and after an outage, and how power is restored. Safety messages are communicated via social media channels (primarily Twitter, Facebook and Instagram). Prior the event, Alectra issued multiple notices via social media channels – primarily Twitter. Additional Comments for Q4: Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its operational areas. The Emergency Plan is based on the Incident Management System (“IMS”) and requires training exercises to be conducted annually. Exercises must be debriefed and critiqued, and a brief written summary of the debriefing is distributed to all staff participating in the exercise. Training of Alectra Utilities system controllers (and others, as required) is performed on an ongoing basis, and continual review of the Emergency Plan is completed. On April 15, 2022, high winds and rain caused trees to fall on primary circuits and caused broken poles in Alectra’s West service territory. Long duration outages resulted, as trees were cleared, and overhead circuits were repaired. N/A Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 46884 4.30000019073486 11 Yes No No further action is required at this time No Yes Yes N/A Alectra Utilities Corporation Alectra Utilities Corporation 2022 2022-07-06T09:22:26 2022-05-21T00:00:00 11:24 EST Yes Environment and Climate Change Canada issued a thunderstorm warning for Ontario on May 21, 2022. The following locations that are serviced by Alectra Utilities were anticipated to be impacted by 130 km/hour wind gusts, nickel to toonie-sized hail, and risk of tornadoes: Hamilton, Dundas, Waterdown, Ancaster, Rockwood, Brampton, Mississauga, Richmond Hill, Vaughan, Markham and Aurora. In anticipation of the thunderstorm, additional Control Room and Lines staff were made available on May 21, 2022. Alectra’s Communications team regularly prepares for emergencies. Full staff complements from the Communications and Government Relations teams were made aware of the incoming weather system and were asked to charge devices and remain on standby in the case of an event. Additional Comments for Q3: Alectra’s Communications team regularly informs customers regarding how to prepare for major events. Messages include how to prepare a 72-hour emergency preparedness kit, what to do before, during, and after an outage, and how power is restored. Safety messages are communicated via social media channels (primarily Twitter, Facebook and Instagram). Alectra’s Communications team updated the banner message on alectrautilities.com and posted media releases on the homepage. Additionally, safety messages and videos were posted across all social media channels. Additional Comments for Q4: Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its operational areas. The Emergency Plan is based on the Incident Management System (“IMS”) and requires training exercises to be conducted annually. Exercises are debriefed and critiqued, and a brief written summary of the debriefing is distributed to all staff participating in the exercise. Training of Alectra Utilities’ system controllers (and others, as required) is performed on an ongoing basis, and regular review of the Emergency Plan is undertaken. On May 21, 2022, strong winds and rain caused havoc on the overhead infrastructure throughout Alectra’s service territory. In the Central and East regions, broken poles were caused by either strong winds or fallen trees and branches. The West and Southwest regions were also impacted by outages due to tree contacts and adverse weather. Tree contacts due to high winds accounted for 43.51% and adverse weather accounted for 50.60% of the total customer-hours of interruption (“CHI”) (1,515,746.90) associated with the MED. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 297650 28 13 Yes No No further action is required at this time No Yes Yes Alectra Utilities Corporation Alectra Utilities Corporation 2022 2022-10-11T14:54:28 2022-09-17T00:00:00 13:33 EST No Hydro One Networks Inc. (HONI) indicated that a tractor trailer crashed into one of HONI’s distribution network poles. This resulted in a Loss of Supply event for Alectra. Additional Comments for Q4: Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its operational areas. The Emergency Plan is based on the Incident Management System (“IMS”) and requires training exercises to be conducted annually. Exercises are debriefed and critiqued, and a brief written summary of the debriefing is distributed to all staff participating in the exercise. Training of Alectra Utilities’ system controllers (and others, as required) is performed on an ongoing basis, and regular review of the Emergency Plan is undertaken. On September 17, 2022, HONI reported a tractor trailer collided with one of HONI’s distribution network poles near Highway 12 and Triple Bay Road, in Tay Township. The pole supports HONI 44kV feeders 98M3 and 98M7 out of Waubaushene transformer station (TS). These feeders are the only supply to the Town of Penetanguishene. Both feeders are in parallel on the same structures for 21.3 km from the Waubaushene TS to Penetanguishene. The 98M3 also supplies MS421 Fox Station and MS422 Robert Station. As a result of the incident, customers supplied from these municipal station feeders were also impacted. The pole was isolated, and customers remained without power for the duration of the pole replacement by HONI. Of Alectra's total customer base of 1,082,316 customers, 0.36% (3,923 customers) experienced an interruption during the major event. Loss of Supply Yes, used IEEE Standard 1366 Yes 3923 0 15 No No No further action is required at this time No Algoma Power Inc. Algoma Power Inc. 2022 2022-01-20T09:08:07 2021-11-21T00:00:00 6:00 PM No The only prior warning that API had was a general weather statement prior to the event, warning of the potential for severe winter weather conditions. As the event unfolded, other warnings were released, including a Snow Squall Watch and a Wind Warning published by Environment Canada. Severe winter weather started in the area @ 6:00pm, with sustained winds of 44-58 km/h and gusts registering up to 86 km/h throughout the rest of the day, along with blowing snow. As a large amount of the overall customers affected came from an interruption that started after several significant initial outages that crews were already engaged in, and ran through the overnight, which contributed to response and restoration delays. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 4886 39.9000015258789 15 No No Others No Throughout the course of the event, and shortly after completing all restorations, key API personnel were in regular communication to discuss challenges and successes in managing all facets of the restoration efforts. This is consistent with the process t Algoma Power Inc. Algoma Power Inc. 2022 2022-02-08T10:45:18 2021-12-16T00:00:00 05:01 AM No The only prior warning that API had was a general weather forecast prior to the event, warning of the potential for severe winter weather conditions. As the event unfolded, other warnings were released, including a Wind Warning at 5:50 am and a Snow Squall Warning issued at 7:00 pm, both published by Environment Canada. Storm conditions started early in the day, with wind and rain at the onset. The precipitation changed from rain, to sleet, and eventually to snow as temperatures dropped throughout the day. Winds remained sustained, with significant gusts. The last outage to be restored – at 1:53am on December 17th, affected approximately 13% of API’s overall affected customers (12.68% to be exact), so the response to the question is listed above as it is. All other interruptions were restored by 9:13pm on December 16th (approximately 16 hours after the first outage was reported). Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 4975 40.5999984741211 21 Yes No Others No Throughout the course of the event key API personnel were engaged to monitor restoration progress and ensure that all facets of the effort were managed – and that any challenges were addressed – effectively. To remain consistent with the process that API Burlington Hydro Inc. Burlington Hydro Inc. 2022 2022-01-18T12:21:05 2021-12-11T00:00:00 4:50 AM Yes The weather report called for wind gusts of 70 to 90 km/hr. Wind gusts of 90km/hr are the start of the threshold where power outages can occur. A windstorm affecting many customers was not expected. Wind gusts in the Burlington area were over 100 km/hr. Additional On Call staff were placed on standby. Burlington Hydro’s Lines Contractor and Tree Trimming Contractor were asked to have crews available. Windstorm with wind gusts in excess of 100 km/hr. Multiple tree contacts, broken poles, primary conductor and secondary conductor issues as a result of the wind gusts. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 7397 10.8000001907349 8 No No Others No Yes Yes Burlington Hydro is reviewing the hardware which supports its Outage Management System to mitigate technical issues. Burlington Hydro Inc. Burlington Hydro Inc. 2022 2022-07-12T13:50:31 2022-05-21T00:00:00 12:30pm No Intense thunderstorm with winds in excess of 140 km/h. North Bay Power, Canadian Niagara Power and Niagara Peninsula Energy assisted BHI in its restoration efforts Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 24566 35.7000007629395 9 No Yes Others Yes Burlington Hydro is reviewing its Outage Management System to mitigate technical issues. This will ensure the public is notified in a timely manner on outages and ETRs. Burlington Hydro Inc. Burlington Hydro Inc. 2022 2022-09-29T10:17:05 2022-08-21T00:00:00 02:53 AM No The weather forecast called for thunderstorms but they were not expected to be severe. Adverse weather (thunder storm with heavy rain) caused large tree limb to break, fall on hydro lines and lockout two 27.6kv feeder circuits. Hydro One bus protection over tripped and two additional 27.6kv feeder circuits locked out. Others Yes, used IEEE Standard 1366 Yes 8902 11.8999996185303 8 Yes No Others No Extensive tree trimming was completed in area of fault to better prevent tree contacts in this area in the future. Hydro One will be investigating why Burlington B Bus over tripped. Canadian Niagara Power Inc. Canadian Niagara Power Inc. 2022 2022-01-18T10:56:04 2021-12-06T00:00:00 01:11 AM Yes CNP’s Operations Supervisor emailed the CNP Operations Department regarding the potential wind speeds prior to the storm. As the event unfolded a wind warning was published by Environment Canada. Applicable Operations Staff attended a preparation meeting prior to the storm event to discuss storm event procedures and staff availability. Contractors for line locates and line work were notified of the upcoming weather event to leverage any resources they had available as repairs commenced for two days. On December 6th, a wind storm hit the CNP service territory including Fort Erie and Port Colborne. Wind gusts of up to 95 km/h caused multiple trees to fall onto and damage CNP line infrastructure, which resulted in many outages. A large amount of the overall customers affected came from an interruption that started after several significant initial outages that crews were already engaged in, which contributed to response and restoration delays. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 9201 35 19 No No Others No Yes No Throughout the course of the event, and shortly after completing restorations, key CNP personnel were in regular communication to discuss challenges CNP and successes in managing all facets of the restoration efforts. This helps understand what worked and Canadian Niagara Power Inc. Canadian Niagara Power Inc. 2022 2022-02-08T15:47:33 2021-12-11T00:00:00 03:00 PM Yes On Friday, December 10, 2021, Environment Canada issued wind warnings for much of Southern Ontario, indicating that damaging winds were expected on Saturday, December 11, 2021. CNPI’s Operations Supervisor emailed the CNPI Operations Department regarding the potential wind speeds prior to the storm. Appendix A, depicts the weather conditions for December 11, 2021. CNPI had a normal complement on-call during the daytime on December 11th, 2021, with the ability to call in additional crews if required. Additional crews were made available for outage response on December 11, 2021, with many crews working into the following days to complete restoration. CNPI had a normal complement on-call during the daytime on December 11th, 2021, with the ability to call in additional crews if required. Additional crews were made available for outage response on December 11, 2021, with many crews working into the following days to complete restoration. CNPI did utilize assistance through a third party mutual assistance agreement (Welland Hydro), and also used a number of private utility-based contractor (Gams, Peters Excavating & Pineridge Tree Service). Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 22109 83 20 No Yes Others No Yes Yes Throughout the course of the event, and shortly after completing restorations, key CNP personnel were in regular communication to discuss challenges CNP and successes in managing all facets of the restoration efforts. This helps understand what worked and Centre Wellington Hydro Ltd. Centre Wellington Hydro Ltd. 2022 2022-07-07T09:36:00 2022-06-17T00:00:00 6:50 PM Yes There were wind warnings on local and provincial media outlets warning of 70km plus winds from midday until late evening. The wind warnings were discussed prior to the end of the normal work day with Operations staff with the expectation that outages were potentially going to occur. Staff was aware of availability. On June 17th, 2022 CWH encountered two individual outages that affected two different feeders. Both outages were caused by trees being blown onto lines during a windstorm. Both incidents are categorized as cause code 6 – adverse weather. The outages affected a total of 1,169 customers. This represents 15% of CWH’s total number of customers. The Elora EMS2-F4 feeder outage affected 421 customers and the Fergus FMS4-F-9 feeder outage affected 748 customers. It took 1 hour and 30 minutes to have all customers restored. The EMS2-F4 feeder outage was for 80 minutes and the FMS4-F9 feeder outage had a duration of 91 minutes. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 1169 15 2 No No No further action is required at this time No Yes No A debrief with Operations staff after the major outage was discussed with no alterations to current practices in addressing such outages being required. Centre Wellington Hydro Ltd. Centre Wellington Hydro Ltd. 2022 2022-08-11T09:14:11 2022-08-01T00:00:00 7:04 pm No Loss of supply (cause code 2) due to upstream distributor equipment failure (pole fire due to tracking insulator). Loss of Supply Yes, used IEEE Standard 1366 Yes 5124 68 2 Yes No No further action is required at this time No A debrief with Operations staff after the major outage was discussed with no alterations to current practices in addressing such outages being required. Centre Wellington Hydro Ltd. Centre Wellington Hydro Ltd. 2022 2022-08-11T09:19:41 2022-08-03T00:00:00 6:11 pm Yes There was Environment Canada Severe weather and Tornado warning at approximately 5:45 pm. The warning was released after the end of the normal workday for operations staff. CWH encountered an outage that affected all customers in Elora. The outage cause was due to numerous trees and tree limbs breaking and coming into contact with the 44kv, M7 circuit fed from Hydro One. This incident is categorized as cause code 2 – Loss of Supply. It took 7 hours and 20 minutes to have all customers restored. Loss of Supply Yes, used IEEE Standard 1366 Yes 2060 27 7 Yes No No further action is required at this time No No No A debrief with Operations staff after the major outage was discussed with no alterations to current practices in addressing such outages being required. Elexicon Energy Inc. Elexicon Energy Inc. 2022 2022-01-17T15:11:26 2021-12-11T00:00:00 12:00 AM Yes Early reports of high winds being expected were received on Dec 10, 2021. Yes, additional Elexicon staff were put on standby in all Districts expected to be affected (all Elexicon districts in this case). As well, arrangements were made with key contractors to provide staff if called upon. Windstorm Interrupted customers represent 17.6% of the distributor's total customer base. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 30471 17.6000003814697 22 Yes No Additional staff training No Yes No Additional staff training and Process Improvements. Elexicon carried out an event debrief meeting and has created a lessons learned register from this event (and future events) that will be used to continuously improve its Power Restoration Plan (PRP) and Elexicon Energy Inc. Elexicon Energy Inc. 2022 2022-07-13T10:54:18 2022-05-21T00:00:00 12:30 PM Yes Yes, Elexicon Energy Inc. (“Elexicon”) had very limited prior warning based on reports of high winds advancing into its service territory. However, Environment Canada’s Severe Thunderstorm Warnings for Uxbridge and Northern Regions of Durham, Pickering, Oshawa, Southern Durham Region were not issued until after Elexicon had issued its own Pre-Event Readiness warning internally on May 21, 2022. Elexicon issued a Pre-Event Readiness warning internally on May 21, 2022. This Readiness warning alerts staff to the possible need for their assistance should the conditions require it. On May 21, 2022 a derecho storm swept through the province of Ontario and large portions of Elexicon’s service territory. This widespread and fast-moving storm caused extensive damage to Elexicon’s infrastructure thereby leading to prolonged power outages for the majority of Elexicon’s customers. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 126456 73 70 Yes No Additional staff training Yes Yes No Additional actions are: Process Improvements and System upgrades. Elexicon is currently undertaking an organization-wide event postmortem, including Lessons Learned from this event that will inform specific improvements related to staff training, process Elexicon Energy Inc. Elexicon Energy Inc. 2022 2022-08-04T14:44:46 2022-06-16T00:00:00 13:40 PM Yes Yes, Elexicon Energy Inc. (“Elexicon”) issued internal warnings of possible thunderstorms based on Environment Canada warnings for the Brock area on June 16 at 12:48PM and for Belleville at 2:40PM. As the warnings occurred during regular working hours, all staff were considered to be on standby for possible storm related repairs. Another main contributing cause is the: Adverse Weather-Wind A severe thunderstorm passed through the region of Belleville, resulting in downed trees and conductors. Hydro One lost two feeders during the storm which supplied Elexicon stations. As a result, Elexicon customers supplied from those facilities lost power. After Hydro One restored power, downed trees on Elexicon lines further hindered restoration efforts. 25 Hours and 42 minutes Loss of Supply Yes, used IEEE Standard 1366 Yes 22549 12.8999996185303 26 Yes No Additional staff training No No Yes Other Steps were: Process Improvements and System Upgrades The Lessons Learned from the ongoing organization-wide May 21, 2022 Wind storm event postmortem are expected to be useful in events such as the June 16, 2022 Belleville storm. Elexicon anticipates Enova Power Corp. Kitchener-Wilmot Hydro Inc. 2022 2022-02-07T09:43:36 2021-12-11T00:00:00 1:04 pm Yes KWHI warned its customers on social media of high winds in the forecast. Regular on-call operational resources were in place prior to the event. Arrangements for additional staff on duty or on standby were not made for this event. In the early afternoon of Saturday, December 11, 2021, Waterloo Region experienced a windstorm with winds reaching 65 km/hour and wind gusts of over 90 km/hour. Trees and/or branches fell on overhead power lines, interrupting power to customers during the windstorm which lasted until about 7 pm. The main places affected were in the Township of Wilmot, including the village Mannheim, where a tree fell and broke a pole and in the villages of St. Agatha and Petersburg where another tree took also broke a pole and impacted an entire distribution feeder. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 10476 9.5 7 No No No further action is required at this time No No Yes Enova Power Corp. Kitchener-Wilmot Hydro Inc. 2022 2022-07-14T09:13:35 2022-05-21T00:00:00 12:13 pm No In the early afternoon of Saturday, May 21, 2022, Waterloo Region experienced a rare class of damaging wind – a derecho -a windstorm with wind gusts reaching 130 km/hour. Trees fell on overhead power lines, poles were broken and transformers needed to be replaced interrupting power to customers during the short windstorm. Waterloo North Hydro and K-Line Maintenance and Construction assisted throughout the event. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 19385 19 11 No Yes Additional staff training No ENWIN Utilities Ltd. ENWIN Utilities Ltd. 2022 2022-09-16T10:25:22 2022-07-22T00:00:00 12:19 AM No There was a thunderstorm that came through the City of Windsor that affected three 27.6 kV feeders in the downtown and central Windsor area. All three feeders were affected around the same time resulting in a Major Event Day. There was a thunderstorm that came through the City of Windsor that affected three 27.6 kV feeders in the downtown and central Windsor area. Large tree limbs fell into the primary powerlines due to the storm. All three feeders were affected around the same time starting at 12:19am and full restoration was achieved at 5:48am. None Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 19661 21 2 No No No further action is required at this time No The Major Event was caused by a strong thunderstorm which are frequent in the Windsor area. ENWIN’s Control Room was able to dispatch standby employees, call in extra employees and remotely reconfigure the distribution system to restore power efficiently. GrandBridge Energy Inc. GrandBridge Energy Inc. 2022 2022-07-18T14:24:27 2022-05-21T00:00:00 12:09 PM Yes On Saturday, May 21, 2022, a GrandBridge Energy (GBE) Control Room Operator and Operations Supervisor On-Call were monitoring the inclement weather tracking east from Sarnia and Windsor toward GBE’s service territory. GBE received a severe thunderstorm alert from Environment Canada at approximately 12:00 EDT. Environment Canada Weather Forecast on Saturday, May 21, 2022: At 09:43 EDT, Environment Canada issued weather statements for Sarnia and Windsor, which was upgraded for Sarnia to a severe thunderstorm warning at 10:25 EDT. Severe thunderstorm watches for the London area followed at 10:41 EDT, upgraded to a severe thunderstorm warning at 11:08 EDT. The alert mentioned possible strong wind gusts up to 100 km/h, along with nickel-sized hail. Severe thunderstorm watches were issued for points eastward of London at 11:19 EDT. These were later upgraded to severe thunderstorm warnings. Additionally, after the derecho impacted London, Environment Canada issued an emergency alert for regions in Ontario and Quebec along the path of the storm, with alerts going out over cellphones, television, and radio. The Environment Canada forecast did not provide sufficient time for the distributor to place additional employees on duty or on standby prior to the Major Event beginning. However, as part the GBE’s normal practice, the resourcing for the long weekend included an extra Operations crew on-call for the Cambridge and North Dumfries areas with an extra Operations crew on-call for the Brant County area. The main contributing cause of the Major Event was Tree Contacts (Cause Code 3). GBE experienced 20 major outages of which 12 of them were tree contacts. Of the 12 tree contact outages, 1 of them resulted in lines down only and 2 of them resulted in lines down with broken poles. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 51816 47 7 Yes No System upgrades No No No • Incorporate Brantford’s distribution area into GBE’s public-facing Outage Map to provide Brantford customers with instant access to outage status information. • Continue deploying grid modernization technology (i.e. automated reclosers) to increase GBE’ Hydro 2000 Inc. Hydro 2000 Inc. 2022 2022-05-30T11:15:23 2022-05-21T00:00:00 04:45 PM No The Derecho storm of Saturday May 21st passed through our area at approximately 16:45 pm The Derecho storm of Saturday May 21st that affected most of southern Ontario passed through our area at approximately 16:45. Adverse Weather-Wind No, used fixed percentage (i.e., 10% of customers affected) Yes 1508 100 137 Yes Do not have third party mutual assistance agreements with other utilities Additional staff training No In the event of Derecho storm, clean-up and safety was priority before restoring power. Staff training will be about communication and client empowerment on feeling understood. Hydro One Networks Inc. Hydro One Networks Inc. 2022 2022-01-31T11:29:03 2021-12-11T00:00:00 11:51 AM Yes Hydro One was aware of this low-pressure system and was monitoring its impacts through the weather monitoring system when it began in the southern United States on December 10th. During the pre-storm call on the morning of December 10th, extra staff were arranged in advance of the storm. These included: Lines, Damage Assessors and Field Business Centre staff. The main contributing causes of the Major Event were tree contacts and equipment failures during the windstorm. It took 149 hours and 12 minutes from the onset of the Major Event to restore 90% of the approximately 761,100 customers who were interrupted by this storm. CONTRACTORS AND LDC’S THAT ASSISTED Alectra K-Line Construction Black & Mac Lakeland Power Devries Power and Utility London Hydro Dundas Powerlines Niagara Peninsula Energy Durham High Voltage Oakville Hydro Elexicon Orangeville hydro Entergus Ottawa Rive Others No, used fixed percentage (i.e., 10% of customers affected) Yes 761100 52 149 Yes Yes Process improvements No Yes Yes Hydro One is proactively prepared for each Major Event by conducting a debrief to identify lessons learned, including issues and recommendations to improve Damage Assessment, ETR accuracy and Customer Satisfaction. Major process improvements such as train Hydro One Networks Inc. Hydro One Networks Inc. 2022 2022-06-10T14:03:04 2022-04-15T00:00:00 03:45 PM Yes The Significant Event Notification System (SENS) forecasted the spring snowstorm and blizzard weather conditions that began on Monday April 11th, 2022. During the pre-planning events, extra staffing was arranged at the Operation Centers to prepare all emergency response positions ahead of the storm. The main contributing causes of this Major Event were tree contact and equipment failure during the windstorm. It took 61 hours and 7 minutes from the onset of the Major Event. Burlington Hydro; Lakeland Power Distribution Ltd Durham High Voltage; North Bay Hydro EPCOR; Sproule Powerline Construction Ltd ERTH Power; Valard Construction K-Line Construction Ltd Others No, used fixed percentage (i.e., 10% of customers affected) Yes 213000 14 61 Yes Yes Process improvements No Yes Yes A storm debrief meeting was scheduled and held on May 9th, 2022 for both process improvements and additional staff training. Hydro One Networks Inc. Hydro One Networks Inc. 2022 2022-08-15T09:26:31 2022-06-17T00:00:00 01:24 PM Yes From the use of the IBM Predication Software and Weather Monitoring system. Extra staff were arranged in advance of the storm. These included: Lines, Damage Assessors and Field Business Centre staff. The main contributing causes of the Major Event were equipment failures and tree contacts. Alectra Dundas Power Erie Thames Others No, used fixed percentage (i.e., 10% of customers affected) Yes 252000 17 60 Yes Yes Process improvements No Yes Yes A storm debrief meeting is scheduled in August to identify lessons learned and develop recommendations. Hydro One Networks Inc. Hydro One Networks Inc. 2022 2022-08-16T09:14:05 2022-05-21T00:00:00 03:07 PM No The IBM Prediction Software and Weather Monitoring tool did not produce warning about a storm of this size. As such, no early warning was issued, with the exception of a warning from Environment Canada shortly before the storm impacted the system. The main contributing causes of the Major Event were equipment failures and tree contacts. Aecon/Ainsworth Bird Electric Bluewater Power Black & Macdonald Devries Electric Inc. Dundas Power Line Durham High Voltage ERTH Power EPCOR Utilities Inc. Enwin Utilities EPTCON Forbes Contracting Festival Hydro Fortis Ontario Group of Companies Holland Others No, used fixed percentage (i.e., 10% of customers affected) Yes 890100 60 250 Yes Yes Process improvements No A storm debrief meeting was scheduled and held on June 13th, 2022 to identify lessons learned and develop recommendations. Hydro Ottawa Limited Hydro Ottawa Limited 2022 2022-07-20T13:05:59 2022-05-21T00:00:00 3:36 PM No No. Winds were forecasted however the severity of the winds exceeded what was expected. Environment Canada issued an alert for a Severe Thunderstorm Watch at 2:12 pm on May 21, 2022. Hydro Ottawa started experiencing outages between 3:45 - 4:00 pm thereafter. Derechos are challenging to predict. On days when derechos form, it is often uncertain whether any storms will form at all. But if they do, the chance exists for explosive development of intense winds*. Derechos are among the most destructive weather events that Canada can experience. While the wind intensity cannot equal a strong to violent tornado, the expanse of area affected in orders of magnitude is greater, often resulting in greater overall impact than tornado event**. *www.theweathernetwork.com/ca/news/article/what-is-a-derecho **www.theweathernetwork.com/ca/news/article/nearly-half-of-canadas-population-hit-by-derecho-why-it-was-harmful The primary cause of interruption for the Major Event was due to a Derecho, a widespread, long-lived wind storm that is associated with a band of rapidly moving showers or thunderstorms. This event was considered to be a Major Event day based on the IEEE Standard 1366 method. The daily SAIDI value of 2308.27 on May 21, 2022 exceeded the daily threshold of 5.05, as determined by IEEE Standard 1366. The total number of customer hours interrupted on May 21, 2022 was 35,491. There were areas damaged from the storm that experienced outages on the days after the storm, which are also part of the Major Event. The total outage hours for the full storm period was 13,367,385. 180,946 customers were interrupted on the day of the major event plus an additional 11,528 customers were impacted on the days after the storm due to damage from the storm. This represented 54% of Hydro Ottawa's total customer base. The major damage from the wind started May 21st at 3:36 p.m. and 90% were restored by May 28th at 6:00 p.m. Four high voltage lines contractors, four neighbouring utilities, three forestry contractors, three civil contractors and one communications contractor for a total of 450 workers were utilized for assistance with storm recovery. Others Yes, used IEEE Standard 1366 Yes 180946 54 170 Yes Yes Others No Others. A company wide debrief is being conducted due to the magnitude of the event that took place May 21, 2022. Findings will be actioned and Hydro Ottawa has and will continue to look at lessons learned as a result of the major event. A derecho is defi Hydro Ottawa Limited Hydro Ottawa Limited 2022 2022-08-12T12:22:44 2022-06-18T00:00:00 12:13 PM No No, Hydro Ottawa had no prior warning that the Major Event would occur as it occurred due to a loss of supply event. Hydro Ottawa had a full complement of on-shift personnel, and a full on-call roster of field technicians and management personnel available. On June 18th at 12:13pm a cable fault occurred on the Hydro One C7BM 115kV transmission supply resulting in a loss of supply to six Hydro Ottawa substations which led to 27000 Hydro Ottawa customer outages. It took 2 hours and 40 minutes to restore 90% of the customers related to the major outage. The major outage started at 12:13 pm on June 18th, 2022 and 90% were restored at 2:53 pm of the same day. Loss of Supply Yes, used IEEE Standard 1366 Yes 27405 8 2 Yes No No further action is required at this time No No There is an ongoing focus on on-call and emergency response preparations with the goal of continuous improvement. InnPower Corporation InnPower Corporation 2022 2022-07-18T10:57:37 2022-06-16T00:00:00 12:30:34PM Yes InnPower was aware that there was extreme weather coming as its system control group continually monitors the weather and system conditions. InnPower always has at least two line employees, one supervisor and one customer service management support on call for emergencies. Additional staff were called in as more outages occurred Major outages occurred throughout our area on Thursday, June 16th afternoon continuing until the morning of Saturday, June 18th. High winds caused extensive tree contacts and the repair of a 44kv insulator. InnPower cleaned up and restored power as fast as possible by calling in additional resources to support restoration efforts. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 14244 70 6 Yes No Others No Yes Yes InnPower is improving its reliability through vegetation management programs and also adding smart devices in the field for better and faster restoration. Lakeland Power Distribution Ltd. Lakeland Power Distribution Ltd. 2022 2022-11-21T15:05:11 2022-10-20T00:00:00 5:10 am No Huge snow storm Loss of Supply Yes, used IEEE Standard 1366 Yes 10902 76 14 Yes No No further action is required at this time No London Hydro Inc. London Hydro Inc. 2022 2022-07-15T16:28:20 2022-05-21T00:00:00 11:30 AM No Environment Canada issued typical weather warnings of thunderstorms and windy weather, but it did not call for such major event causing tornado-like winds that were seen. Severe thunderstorms, accompanied by high winds, heavy rain and hail, passed through London Hydro's distribution area on May 21, 2022 at around 11:30am. The resulting high wind from the storm knocked down several trees throughout the region that damaged various hydro poles and power lines. The major event started at 11:30am on May 21st, and over 90% of customers were restored by 7:15pm on May 21st. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 57034 34.5999984741211 8 No No Others No London Hydro has an Emergency Procedures Plan; training and mockups are performed annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of extensive damage to London Hydro Milton Hydro Distribution Inc. Milton Hydro Distribution Inc. 2022 2022-07-21T09:45:56 2022-05-21T00:00:00 12:10 PM Yes On Saturday, May 21, 2022, on-call operations, and management team were monitoring the weather travelling from east to Milton Hydro’s service territory. Severe thunderstorm alarm from Environment Canada was received at approximately 12.00pm EST. The Environment Canada forecast did not provide sufficient time for Milton Hydro to place additional employees on duty or on standby prior to the Major Event beginning. However, it is Milton Hydro’s common practice to have on-call personnel on standby on after-hours, weekends, and holidays. The Cause of Interruption for the Major Event was Cause Code 6, Adverse Weather. The event was consistent with the OEB definition of Cause of Interruption Code 6 “Adverse Weather” due to high winds. On May 21, 2022 at approximately 12.10pm, a storm classified as Derecho brought damaging winds up to 130km/hr across Milton, SW Ontario and Quebec. This caused fallen tree and limbs on wires, broken wires, downed wires, snapped poles, broken insulators and blown transformer/fuses across Milton Hydro’s service territory leading to prolonged power outages affecting 5,279 customers. Crews and office staff were called in for assistance, along with the contractors. Power was restored to 3,879 customers on day one, 1,150 customers on day two and the remaining on day three. Adverse Weather-Wind No, used fixed percentage (i.e., 10% of customers affected) Yes 5279 12.3000001907349 13 No No Others No No No Milton Hydro conducted a review of its outage response for this outage and determined that the response was conducted in a safe, effective and controlled manner. Areas for improvement were identified for customer communication, grid modernization, damage Niagara Peninsula Energy Inc. Niagara Peninsula Energy Inc. 2022 2022-02-02T09:53:44 2021-12-11T00:00:00 12:18 PM Yes Environment and Climate Change Canada issued two special weather statements on December 10, 2021, for high winds and heavy rain. Niagara Peninsula Energy Inc. (“NPEI”) always has staff on-call during the weekends. Due to the weather statements, NPEI arranged to have extra employees on standby for Saturday December 11th and Sunday December 12th. A severe wind storm impacted NPEI’s service territory on December 11, 2021, with wind gusts exceeding 100 km/h. The storm resulted in downed wires, fallen trees and flying debris, which caused significant outages. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 15488 27 10 Yes No Process improvements No Yes Yes NPEI is reviewing the Major Event response to identify potential process improvements. One improvement to be implemented is: NPEI will document customer-owned equipment in its CIS system. This will allow more efficient communication with customers in case North Bay Hydro Distribution Limited North Bay Hydro Distribution Limited 2022 2022-11-07T13:57:34 2022-10-20T00:00:00 21:39 AM No Loss of Supply From Hydro One to Massey territory. Tree fell on Hydro One feeder. 16% is based on the Espanola territory. Loss of Supply No, used fixed percentage (i.e., 10% of customers affected) No 543 16 1 Yes No No further action is required at this time No Oakville Hydro Electricity Distribution Inc. Oakville Hydro Electricity Distribution Inc. 2022 2022-02-08T13:58:38 2021-12-11T00:00:00 14:00 PM Yes A wind warning was issued from Environment Canada for Oakville and surrounding areas, calling for strong winds throughout the afternoon and into the early evening. Winds could reach up to 90 km/h, according to the warning, which can be blamed on a cold front sweeping through southern Ontario. The warning noted that strong winds would continue throughout the day and until late evening. The warnings also advised that utility outages might occur along with damage to buildings, such as to roof shingles and windows, and that high winds might toss loose objects or cause tree branches to break. Additional skilled personnel were placed on-call, prior to the event. On December 11, 2021 the Town of Oakville sustained a severe, high wind weather event. The Town sustained 60 km/h winds, with gusts up to 90 km/h from the afternoon and into the night. The length of overhead wire patrol routes and lingering effects of the storm caused increased frequency and duration to outages. 5.98 hours (359 minutes) to restore over 90% of the customers Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 15035 19.7999992370605 6 No No Process improvements No Yes Yes Continuous improvement to our maintenance program through increased inspections, including trimming where necessary, of tree proximity to overhead lines along heavy tree canopy areas (south-east Oakville). Oakville Hydro Electricity Distribution Inc. Oakville Hydro Electricity Distribution Inc. 2022 2022-06-30T13:30:48 2022-05-21T00:00:00 12:43 PM Yes An alert was issued the morning of May 21, 2022. The alert mentioned possible strong wind gusts up to 100 km/h (62 mph), along with nickel-sized hail. Most of southern Ontario south of the 401 was assigned a marginal risk of severe weather, which changed after noon as the storm progressed and intensified. Little advanced warning was provided to allow for additional planning On May 21, 2022 southern Ontario experienced a historic derecho and one of the most impactful thunderstorms in Canadian history, with winds up to 190 km/h (120 mph) as well as several tornadoes, caused widespread and extensive damage along a path that extended for 1,000 kilometres. The severe spring storm rolled through Oakville in the early afternoon on Saturday, causing widespread power outages and road closures due to fallen trees. Wind speeds reached sustained speeds of 120 km/hr. 1 hours, 42 minutes to restore over 90% of the customers Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 25697 34 2 Yes No Process improvements No No No Continuous improvement to the maintenance program through increased inspections, including trimming where necessary, of tree proximity to overhead lines along heavy tree canopy areas (south-east Oakville). Oshawa PUC Networks Inc. Oshawa PUC Networks Inc. 2022 2022-07-19T15:23:02 2022-05-21T00:00:00 13:25 Yes Oshawa Power received a weather warning from The Weather Network. Oshawa Power requested extra on-call staff to be available in addition to our regular on-call staff. At approximately 13:25 on May 21st, 2022, a derecho entered into Oshawa Power territory with strong wind gusts up to 100 km/hr. This storm affected 9,053 customers (15% of customer base) and caused 25 broken poles along with ancillary wire and equipment damage due to the wind and subsequent downed trees. N/A Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 9053 14.8999996185303 8 No No No further action is required at this time No Yes No Ottawa River Power Corporation Ottawa River Power Corporation 2022 2022-07-20T16:00:37 2022-05-21T00:00:00 15:00 PM No Severe weather statements/warnings were issued on very short notice the day of the major event. Rain and possible thunderstorms were forecasted, but no prediction of the event that took place was available. The warnings that were issued did not provide sufficient notice with respect to the severity of the weather event that took place. As per the table in section 2.1.4.2.5, the main contributing cause of the Major Event was #7 Adverse Weather. Secondary to the main contributing cause were #2 Loss of Supply and #3 Tree Contacts. A large portion of the transmission and distribution systems in Ontario were affected by the adverse weather, including Hydro One transmission systems, which resulted in prolonged Loss of Supply issues across all four of ORPC’s territories. ORPC also encounter Tree Contact issues in our Almonte territory resulting in multiple broke poles and trees lying on conductor. N/A Renfrew Hydro Inc. Loss of Supply Yes, used IEEE Standard 1366 Yes 11590 100 12 Yes Yes No further action is required at this time No There were no particular issues as a result of this outage that could be mitigated in the future given the unexpected event and severity of the weather. All necessary resources were available, and staff were trained to deal with the event once it occurred PUC Distribution Inc. PUC Distribution Inc. 2022 2022-10-12T14:05:08 2022-08-28T00:00:00 06:39 No Lighting on Aug 28 is consistent with the OEB definition of “Major Event” (as set out in Section 2.1.4.2 of the OEB’s Electrical Reporting and Record Keeping Requirements). Lightning Yes, used IEEE Standard 1366 No 7140 20.9500007629395 2 No No No further action is required at this time No Post outage review meetings are held after any major event outages are part of an ongoing action plan to try and improve outage times and staff proficiency. Toronto Hydro-Electric System Limited Toronto Hydro-Electric System Limited 2022 2022-07-20T09:55:34 2022-05-21T00:00:00 12:45 PM No Toronto Hydro did not have prior warning of the severe wind storm (the “Major Event”). While Toronto Hydro did arrange to have additional forestry crews on standby over the May long weekend because of the weather forecast showing a risk of thunderstorms, it did not arrange for any additional overhead resources since the available weather forecasts provided no prior warning of the Major Event. Toronto Hydro maintains a standby schedule requiring senior management, supervisory and operational staff to be available on a 24/7 basis to support with event restoration. This standby schedule was in place and operationalized during the Major Event. On May 21, 2022, at approximately 12:45 p.m., a major storm with wind gusts as high as 120 kilometres per hour swept through Toronto Hydro’s service territory. The extreme winds caused substantial damage to vegetation, which in turn damaged overhead distribution wires and equipment. Toronto Hydro declared a Level 2 emergency in response to these system impacts and the exceptionally high volume of trouble calls it received. N/A Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 142000 18 12 No No Process improvements No No No An After-Action Review process was conducted following Toronto Hydro’s response to the Major Event. This process engaged stakeholders who participated in restoration activities to review Toronto Hydro’s response, identify any opportunities for continuous Wasaga Distribution Inc. Wasaga Distribution Inc. 2022 2022-02-12T12:19:20 2021-12-11T00:00:00 15:20 Yes We were somewhat aware through long-range weather forecasts. Wasaga Distribution made sure all equipment was in ready mode, and available personnel was advised of a potential weather event. This outage was outside the control of the distributor and was both unavoidable and unpreventable. Wasaga Distribution had 7,587 customers experience an interruption during the major event which equals to ~50% of its total customer base. Adverse Weather-Wind The IEEE Standard 1366 was used to identify the scope of this Major Event. No 7587 50 5 No No No further action is required at this time No Yes Yes Wasaga Distribution has: • Debriefed staff to discuss lessons learned • Confirmed the existing maintenance and capital programs that assisted in minimizing the customers interrupted during the Major Event. Wellington North Power Inc. Wellington North Power Inc. 2022 2022-01-28T15:37:23 2022-01-15T00:00:00 02:55 am No Supply feed from Hydro One’s Fergus Transmission station (feeder M1) was interrupted resulting in a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). During the Loss of Supply, WNP’s service territory of Arthur was without power. The Loss of Supply was due to the 44 kV conductor failing and falling into the underbuilt line along the Sub-Transmission line south of Arthur. Restoration time was 6 hours 45 minutes Loss of Supply Yes, used IEEE Standard 1366 Yes 1153 29 7 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Wellington North Power Inc. Wellington North Power Inc. 2022 2022-04-06T15:34:35 2022-03-27T00:00:00 8:19 pm No Supply feed from Hydro One’s Hanover Transmission station was interrupted resulting in a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). During the Loss of Supply, WNP’s service territory of Holstein was without power as well as a portion of Mount Forest. The Loss of Supply was due to downed Hydro One sub transmission wire at Orchardville. For 90% of customers, power was restored to Mount Forest at 12:30 am on March 28, 2022. Outage was 4.18 hours (251 minutes). Power was restored to Holstein at 1:30 am on March 28, 2022. Total outage was 5.28 hours (317 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 941 24 4 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Wellington North Power Inc. Wellington North Power Inc. 2022 2022-08-31T10:31:08 2022-08-01T00:00:00 7:24 pm No Wellington North Power Inc. did not have prior warning that the Major Event would occur. Supply feed from Hydro One’s Fergus Transmission station M1 feeder was interrupted resulting in a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). During the Loss of Supply, WNP’s service territory of Arthur was without power. The Loss of Supply was due to a Hydro One broken pole that carries the 44 kV sub transmission line at Fergus. Hydro One restored hydro to Arthur at 10:39 pm on August 1, 2022. Outage was 3.25 hours (195 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 1190 30 3 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Wellington North Power Inc. Wellington North Power Inc. 2022 2022-08-31T10:53:44 2022-08-03T00:00:00 5:54 pm No Wellington North Power Inc. did not have prior warning that the Major Event would occur. Supply feed from Hydro One’s Fergus Transmission station M1 feeder was interrupted resulting in a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). During the Loss of Supply, WNP’s service territory of Arthur was without power. The Loss of Supply was due to a Hydro One’s Fergus Transmission station M1 feeder being locked out – this feeder supplies the 44 kV sub transmission line. At the start of the outage, there was a severe storm in the area with strong winds. Hydro One restored hydro to Arthur at 11:28 pm on August 3, 2022. Outage was 5.57 hours (334 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 1192 30 6 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Wellington North Power Inc. Wellington North Power Inc. 2022 2022-12-06T16:45:16 2022-11-30T00:00:00 12:16 pm No Supply feed from Hydro One’s Fergus Transmission station M1 feeder was interrupted resulting in a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). During the Loss of Supply, WNP’s service territory of Arthur was without power. The Loss of Supply was due to a Hydro One’s Transmission pole being on fire – this transmission line carries the 44 kV sub transmission line. Hydro One restored hydro to Arthur at 2:51 pm on November 30, 2022. Outage was 2.58 hours (155 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 1199 30 3 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Integrated System Operating Centre (ISOC). Algoma Power Inc. Algoma Power Inc. 2021 2021-11-05T10:44:22 2021-08-11T00:00:00 03:38 PM No The only prior warning that API had was a Severe Thunderstorm Warning that was issued @ 2:30pm by Environment Canada. This type of warning, and the timing of the warning (in the latter stages of the crew’s work day) typically does not prompt API to plan for possible impacts. There was no indication that the weather that did occur would be significantly impactful. Severe thunderstorms rolled through the area and carried significant winds that brought trees down on API’s lines and poles – causing severe damage. Unconfirmed reports of a possible tornado in the area were communicated by local residents (pictures of a funnel cloud over a portion of St. Joseph Island – the hardest hit region – were published on social media). As outages did not start happening until later in the day, it took time to mobilize additional crews (beyond the regular on-call crew for the area) and deploy all available resources. As well, for the health and safety of the crews, they were taken off duty at the end of the day (@ 11:30pm) and re-engaged at dawn the next morning. Finally, notifications of a few of the events did not come in until the last two hours of the day, so crews were not assigned to those areas until the next day. Under a recently established mutual assistance agreement, API employed 4 linemen and 2 bucket trucks from the Sault Ste Marie Public Utilities Commission (SSMPUC). In addition, other third-party resources – not affiliated through a formal third party mutu Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 2345 19 28 No Yes Others No Throughout the course of the event, and shortly after completing all restorations, key API personnel were in regular communication to discuss challenges and successes in managing all facets of the restoration efforts. This continues the process that API e Bluewater Power Distribution Corporation Bluewater Power Distribution Corporation 2021 2021-11-09T16:04:32 2021-09-23T00:00:00 03:13 PM No A wind storm passed through the area, causing multiple outages with trees on lines and lines down. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 14279 38.5 7 No No No further action is required at this time No Canadian Niagara Power Inc. Canadian Niagara Power Inc. 2021 2021-01-12T14:47:29 2020-11-15T00:00:00 01:30 PM Yes Environment Canada published several Alerts regarding severe weather and its potential impacts (see Appendix A). These alerts were the only warning of the potential for a Major Event. A normal operations complement was on-call during the overnight hours on November 15, 2020, with the ability to call in additional crews if required. The Regional Manager recognized the potential severity and started contacting staff that were on vacation and/or off for the weekend to mobilize all available resources. Additional crews were made available for outage response on November 15, with many crews working into the following days to complete restoration. On November 15th 2020, an extreme windstorm affected all of the CNPI service territory. A significant period of extreme winds reaching over 130km along with the ground saturation from previous rains contributed to the overall impact of the storm. The winds caused multiple trees to come down resulted in many outages – multiple interruptions on the same feeders in some instances. The falling trees caused multiple broken poles and equipment damage at various locations to the system. As crews triaged the areas of concern and focused their efforts for maximum effectiveness, large groups of customers were restored several times during the first day of crew response only to lose power again as further tree contacts and damage occurred. Also, response times were hampered by the significant effort required simply to get to affected areas, as crews had to remove trees and debris from roads in order to pass through to the locations of some of the outages. The crew also had to wait until City or Town crews cleared roadways in some instances. The 90% threshold was achieved approximately 8.5 hours after the event started. CNPI used private utility-based contractors (GAMS and Pineridge) to supplement its internal line crews and to assist with tree removal efforts. Welland Hydro also provided assistance with additional outage restoration efforts on November 16. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 21341 72 9 Yes Yes Others No Yes Yes In consideration of the impact of tree-caused outages during this and other recent events, CNPI is reviewing the prioritization and overall scope of its tree-trimming program, including seeking input from customers through its DSP engagement survey. Centre Wellington Hydro Ltd. Centre Wellington Hydro Ltd. 2021 2021-02-19T12:50:56 2021-02-05T00:00:00 3:30PM No The outage was due to a Loss of Supply. On February 5th at 3:30 pm all customers of Centre Wellington Hydro had an interruption to their hydro service, due to the Fergus TS losing all supply feeders to CWH. CWH's management contacted Hydro One to check the status of CWH’s feeders. Our management was told power would be restored within 10 minutes. All CWH customers had their power restored at 3:44 PM. The outage lasted 14 minutes, 0.25 hours. Loss of Supply Yes, used IEEE Standard 1366 No 7398 100 0 Yes No No further action is required at this time No Centre Wellington Hydro Ltd. Centre Wellington Hydro Ltd. 2021 2021-03-04T11:16:54 2021-02-24T00:00:00 12:02 PM No The outage was due to a Loss of Supply. On February 24th at 12:02 pm all CWH’s Fergus (fed from the M3) customers had an interruption to their hydro service. It took just over 1 hour (67 minutes), for all affected customers to have their power restored. Loss of Supply Yes, used IEEE Standard 1366 Yes 5124 69 1 No No Process improvements No A management meeting was held the following day to review the phone process. In January 2021 CWH changed our phone service provider and the process and procedures for outages are being updated to reflect the changes regarding the upgrade to the phone serv Elexicon Energy Inc. Elexicon Energy Inc. 2021 2021-01-13T12:08:31 2020-11-15T00:00:00 15:00 Yes Environment Canada weather warnings of potential high winds. Customer care staff were put on standby, add’l control room operator brought in, additional Lines staff put on standby. Very high winds, lots of outages, possibly due to trees or other objects contacting lines in the wind. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 22892 14 9 Yes No Additional staff training No Yes Yes Additional staff training on Elexicon’s Power Restoration plan will be conducted. Elexicon Energy Inc. Elexicon Energy Inc. 2021 2021-01-27T10:46:17 2020-11-25T00:00:00 07:55 AM No An incorrect conductor sleeve was used in a 44kV circuit >40 years ago by a predecessor utility to Elexicon. Once installed, it is very difficult to discover the incorrect application. As a result, this particular sleeve has been in service at this location ever since its installation. On Nov 25, 2020, the sleeve failed and caused an inter-circuit fault between multiple overhead feeders. Duration of this outage was extended by approximately 60 minutes in order to proactively replace similar vintage compression sleeves on the other phase conductors at this location. Others Yes, used IEEE Standard 1366 Yes 17540 10.3999996185303 3 No No No further action is required at this time No This failure of a predecessor utility installed sleeve is a first time occurrence. Elexicon will develop an approach to the inspection of other similar inherited sleeve installations. Even though current Elexicon staff did not install the failed sleeve, p Elexicon Energy Inc. Elexicon Energy Inc. 2021 2021-07-20T14:14:06 2021-05-26T00:00:00 22:09 PM No Hydro One lost one of their transmission circuits, T24C, feeding Thornton TS and part of Whitby TS. At the time of that circuit outage, the backup transmission circuit for these facilities, T26C, was out of service for planned work. As a result, Elexicon customer’s supplied from those facilities lost power. The actual number time it took to restore 90% of the interrupted customers was: 1 hour 38 minutes Loss of Supply Yes, used IEEE Standard 1366 Yes 38055 22 2 Yes No No further action is required at this time No Enova Power Corp. Kitchener-Wilmot Hydro Inc. 2021 2021-08-26T15:42:08 2021-06-29T00:00:00 5:30 PM Yes KWHI warned its customers on social media of a severe thunderstorm warning. Regular on-call operational resources were in place prior to the event. Arrangements for additional staff on duty or on standby were not made for this event. The windstorm including heavy rainfall and lightning started approximately 5:30 PM and lasted for about 15 minutes. The storm was short but very intense with high winds (winds gusting at 120 km/h), heavy rainfall, and lightning. The north-east section of Kitchener was mostly impacted. There were six feeder outages – 4M11, 4M14, 5M21, 5M23, 5M25, and 6M17 and numerous line section and transformer outages. Majority of the damages were due to trees falling on primary and secondary power lines. At the peak of the storm over 12,200 customers were affected by an outage. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 14572 14.6999998092651 6 No No Process improvements No No Yes Enova Power Corp. Waterloo North Hydro Inc. 2021 2021-12-23T09:39:55 2021-12-11T00:00:00 16:00 Yes The Weather Network, Environment Canada, and similar authorities issued special weather statements and wind warnings just hours before the Major Event. • One (1) Line Supervisor • Two (2) Power Line Maintainers (PLM’s). • One (1) Protection and Control Technician. • One (1) System Operator. Environment Canada issued wind warnings for essentially all of the province’s southern regions, gusts between 90 and 120 kilometres per hour through the afternoon and evening, causing outages throughout our territory. There were 7,039 Customer Interruptions for 489,101 Customer Minutes of Interruption. WNH restored 90% of interrupted customers within 2.25 hours. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 7039 12 2 Yes No No further action is required at this time No Yes Yes WNH has implement a number of grid modernization technologies and will continue to do so to increase system reliability and operational efficiencies. An example is Survalent’s Fault Location, Isolation, and Service Restoration (FLISR) software application GrandBridge Energy Inc. Brantford Power Inc. 2021 2021-01-14T09:19:14 2020-11-15T00:00:00 2:19 PM Yes Brantford Power monitors weather alerts issued for the Brantford area by Environment Canada. On the day prior to the event, it was determined that there may be adverse weather the following date. The afternoon of the event a weather (wind) warning was issued form Environment Canada. BPI senior leadership began early preparations on Saturday afternoon and continued to escalate the preparations as the situation became more clear. Preliminary arrangements were made the prior day with senior-level operations staff to monitor the event, though additional staff were not put on formal "standby". The day of the event, arrangements were made with additional staff in the Customer Care area early after the start of the event. On-call staff were available during the event, and further staff were only called in after the event had begun. On the afternoon of Sunday November 15th, 2020, high winds were experienced throughout Southern Ontario, lasting into the evening. Winds of over 100 km/h were measured throughout the region. The nearby areas of St. Catharines and Port Colborne reported record high wind speeds of 141 km/h and 131 km/h, respectively. In Brantford, the storm brought down trees and tree limbs and scattered other debris throughout the city. Alerts of BPI outages began at 2:19 PM and shortly after this time a primary pole broke off in the wind. On-call staff were first to respond in the field, however just over an hour into the event response, further Operations crews were called in for support. Brantford Power had made arrangements with its after-hours third party call answering service to increase staffing if possible and to provide data on incoming calls to assist with power restoration and identifying outage causes. Further staff from the Customer Care area were also brought into the emergency centre to assist with the response, including documenting (scribing), coordinating with the third-party after hours call centre, reviewing service orders to ensure all issues identified via phone were closed, assisting with coordination of response to particular addresses. BPI's Tree Trimming contractor was also on-site and coordinated with Brantford Power to assist with removing debris and clearing power lines. Working from home, the SCADA and DG department assisted with monitoring the OMS Lite system which can indicate which areas are experiencing outages, how many customers are impacted at any given time, and whether power has been restored. Unfortunately this OMS Lite system experienced some issues during the outage, requiring trouble shooting and extra efforts to ascertain all of these statistics. The Manager of Communications worked with the response team to provide frequent updates via Twitter and updating BPI's website, as well as responding to direct online and media inquiries. Frequent checks with the response team were necessary to provide up to date statistics on the number and location of outages and the progress of the outage response. By 8:15 PM, the wind had subsided, all outages had been restored, and Brantford Power did not anticipate any further new outages. The website was available throughout the outage and visits increased significantly from 109 the prior Sunday to 4,332, for almost a 4,000% increase. During an ongoing adverse weather event, it can be difficult to ascertain this statistic. Not all outages begin at the same time and new outages can occur after outage restoration is successful in the same or different areas of the utility's service territory. In some outages, the interruption begins at the same time for all customers, and customer groups are restored sequentially, and if those circumstances it is straight forward to determine when 90% of customers have had power restored. For this outage, the 90% restoration occurred between 4 and 5 hours, however many customers had their power interrupted for a much shorter time (and most customers did not experience an outage at all). Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 16719 41 4 No No Others No No No o Continue to monitor weather apps and Environment Canada alerts; o Continue to prepare and coordinate internally ahead of a potential severe weather event including notifying key staff of a potential requirement to respond (lines, communications, custome GrandBridge Energy Inc. Energy Plus Inc. 2021 2021-01-08T15:16:03 2020-11-15T00:00:00 10:15 AM Yes The Weather Network, Environment Canada, and similar authorities had issued special weather statements and strong wind warning in advance of the major event. Environment Canada issued wind warnings across the province, with some areas seeing gusts measuring up to 110 kilometers per hour. https://www.cbc.ca/news/canada/kitchener-waterloo/wind-freezing-rain-warning-nov-20-1.5802770 Energy+ Inc. ensured appropriate staffing levels were in place to address the expected outages that would occur as a result of the heavy wind conditions. Adverse Weather-Wind (Cause Code 6) was the main contributing Cause for this Major Event. It took 6 hours and 57 minutes to restore power to 90% of customers impacted by the Major Event. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 10317 15 7 Yes No Process improvements No Yes No Energy+ holds a debrief meeting after each Major Event with key members involved to understand items that went well and things that could be improved in the future. Energy+ determined that the response during the Major Event on Sunday November 15, 2020 we Hydro One Networks Inc. Hydro One Networks Inc. 2021 2021-01-11T10:10:38 2020-11-15T00:00:00 01:18 PM Yes Use of IBM Predication Software and Weather Monitoring. Scheduled extra crews to be on call. The main contributing causes of the Major Event are tree contact and equipment failure during the wind storm. It took 66 hours and 33 minutes from the onset of the Major Event. - Festival Hydro; - Tilsonburg Hydro; - Entegrus; - Bluewater; - Essex Power; - Orangeville Power; - ERTH Power; - Rrenfew; - Newmarket Tay; - North Bay Hydro; - ENWIN Power; - Westario; - North Power Utility; - Centre of Wellington; - London Hydro; - Lak Others No, used fixed percentage (i.e., 10% of customers affected) Yes 572000 41 67 Yes Yes Process improvements No Yes Yes Hydro One continues to proactively prepare for each Major Event by conducting briefings throughout the event and lessons learned sessions to specifically improve damage assessment, ETR accuracy and customer satisfaction. At the same time, a major processe Hydro One Networks Inc. Hydro One Networks Inc. 2021 2021-11-11T10:16:26 2021-09-12T00:00:00 06:10 PM Yes From the use of IBM Predication Software and Weather Monitoring. During the pre-planning event, extra staff was arranged in advance of the storm. These included: Lines, Damage Assessors and Field Business Centre staff. The main contributing causes of the Major Event were tree contact and equipment failure during the wind storm. It took 84 hours and 45 minutes from the onset of the Major Event. Others No, used fixed percentage (i.e., 10% of customers affected) Yes 147200 10 84 Yes No Process improvements No Yes Yes Hydro One is proactively prepared for each Major Event by conducting lessons learned sessions to improve Damage Assessment, ETR accuracy and Customer Satisfaction. Major process improvements such as trainings, feeder prioritization, pre-planning preparati Hydro One Networks Inc. Hydro One Networks Inc. - 1937680 Ontario Inc. (Peterborough Distribution) 2021 2021-01-11T15:25:25 2020-11-15T00:00:00 04:10 PM Yes There were weather advisories that were in place in advance of the storm that warned of high winds and intense storm cells due to a cold front moving across the province. However, the potential impact of the storm was difficult to quantify when compared to a hurricane, tornado, or major ice storm. No extra employees were called on standby ahead of the storm. There was no clear indication that this storm would cause significant damage. This event was considered a Major Event since it was caused by an intense windstorm with gusts over 80 km/h. The trees that were brought down onto our lines during this event caused extensive damage to our assets, took significantly longer than usual to repair, and affected a substantial number of customers. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 5200 14 2 Yes No Process improvements No No No PD has implemented a fault location, isolation, and restoration on our 27.6 kV distribution system to reduce the impact of unplanned outages. Hydro Ottawa Limited Hydro Ottawa Limited 2021 2021-08-10T08:26:40 2021-06-14T00:00:00 04:25 PM No Storms were forecasted however the severity of the lightning exceeded what was expected. The main contributor of the major event was lightning. On June 14, Environment Canada issued a severe thunderstorm warning for parts of eastern Ontario, including the Ottawa region. Three lightning related outages were reported, including a Loss of Supply from the provincial transmission system resulting in a loss of load to an entire substation (1,749 customer hours). Another instance of lightning caused a feeder to trip (3,917 customer hours). Lastly, a lightning strike caused arcing within a switchgear at a Hydro Ottawa-owned substation, resulting in the loss of the entire station (29,409 customer hours). These three outages account for over 99% of the interruptions experienced by customers during the Major Event Day. Lightning Yes, used IEEE Standard 1366 Yes 17441 5 8 Yes No Process improvements No Asset Planning is taking a review of the 4kV Stations to ensure backup and offload capability is available. The System Office Grid Automation group is reviewing estimated time of restoration expectations and philosophy. InnPower Corporation InnPower Corporation 2021 2021-01-11T10:50:30 2020-11-15T00:00:00 1:38:00 PM Yes InnPower monitors the weather and system conditions according to weather forecast in order to appropriately allocate resources ahead of time. InnPower always has at least two line employees on call for emergencies. As the intensity of the storm increased, InnPower strengthened these forces by calling additional staff in to remain on standby, as required. One of InnPower's main 44,000 V supply (9M1/ Alliston TS) from Hydro One locked out because of tree contact, which caused an outage for 3,220 customers. Immediately after the storm started, this feeder was backed up from another 44kV feeder through InnPower's service territory. Subsequently, multiple outages occurred because of high winds and storm conditions on the distribution side, which required patrolling in lightning and heavy rain conditions. Crews located a downed distribution line on the 25th side road, 10th line, 9th line (in total we had 37 locations reported outages). It was reported that a tree had struck the pole, carried the current through the line and broke the wire off the insulator, causing one phase to fall into another. Crews started making repairs here while other team members continued to assess other outages and respond to customer inquiries. Over the course of the night, most of the power to customers was restored and crews worked continuously for two days (in shifts) to restore 100% of customers. In total, we had restored 7,487 customers in less than 5 hours, which was 77% of total number of interrupted customers. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 9823 51 7 Yes No Process improvements No Yes Yes More vegetation control and tree trimming based on substandard feeder behavior in areas where there is a high possibility of tree contact (data as mapped and analyzed from SCADA/GIS system). InnPower Corporation InnPower Corporation 2021 2021-05-18T09:29:06 2021-04-28T00:00:00 11:01 AM Yes InnPower was aware that there was active weather coming as its system control group continually monitors the weather and system conditions. InnPower always has at least two line employees on call for emergencies. InnPower had full staff April 28, 2021 On the morning of April 28, a large outage occurred in the South-West of Innpower’s System. The outage was determined to be cause by heavy rains that caused a recently formed osprey nest to fall on top of the 44kV circuit. Others Yes, used IEEE Standard 1366 Yes 4694 24 2 No No System upgrades No Yes No Infrastructure Services will be looking at different ways to best mitigate animal species from building nests without negatively impacting the species. InnPower Corporation InnPower Corporation 2021 2021-05-18T10:24:18 2021-04-30T00:00:00 15:22 PM Yes InnPower was aware that there was active weather coming as its system control group continually monitors the weather and system conditions. InnPower always has at least two line employees on call for emergencies. InnPower had full staff during the event. Wind intensity picked up around 15:00 on April 30th causing a large tree to fall on the distribution lines which caused a huge surge on our distribution system as well as our supply from Hydro One. Crews quickly responded and isolated the section of line and restored most customers around 17:30. There was also significant repairs on Corner Ave due to a downed tree, a broken pole on the 9th Line and other trees on the lines throughout the system. External crews were brought in to assist with restoration efforts. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 11921 60 2 No No Others No Yes Yes Vegetation management InnPower Corporation InnPower Corporation 2021 2021-08-03T15:06:20 2021-07-15T00:00:00 14:38:20PM No Environment Canada issued an emergency alert minutes after the tornado had already occurred. Adverse Weather - Tornado At 14:38, InnPower lost a major supply feeder from Barrie servicing 2,193 customers, due to an EF2 tornado At 14:55, Environment Canada issued a Tornado warning for Barrie and Innisfil By 16:48, InnPower had sectionalized and restored power to 1,088, leaving 1,105 customers without power By 18:08, 1,031 customers had been restored, leaving 74 customers without power (69 restored by 19:32 and 5 restored by 01:54). The main area damaged was Mapleview Drive between Yonge Street and 25th Sideroad, where many homes were damaged and a new 44/27.6 kV pole line put up by InnPower was taken down. Others Yes, used IEEE Standard 1366 Yes 2193 11 3 Yes No No further action is required at this time No InnPower Corporation InnPower Corporation 2021 2021-12-09T15:20:50 2021-12-02T00:00:00 08:00 AM Yes InnPower was aware that there was active weather coming, as its system control group continually monitors the weather and system conditions. InnPower always has at least two line employees on call for emergencies. InnPower had full staff during the event. On December 2nd at 08:00, wind intensity picked up causing a large tree to fall on the distribution line, leaving 482 customers without power. Crews quickly responded, cut and removed the tree from the lines and restored power by 09:59. The wind continued throughout the day into the evening, causing two more significant outages. An outage occurred at 14:08 due to the 44kv tap being blown off the amp connection. 1957 customers were without power until the crews were safely able to install a jumber and restore power at 17:23. Full repairs were completed the following day. The third outage affecting 130 customers occurred at 19:25 due to another tree being twisted in the three phase circuit. The crew isolated the area and restored 126 customers by reclosing the blue phase by 22:55 . The remaining 4 customers were restored at 00:45 on December 3rd. To complete the tree removal, an additional 5 customers had an outage from 22:20 to 00:45. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 2574 12 3 No No No further action is required at this time No Yes No InnPower Corporation InnPower Corporation 2021 2021-12-22T08:43:13 2021-12-11T00:00:00 14:45:18PM Yes InnPower was aware that there was extreme weather coming, as its system control group continually monitors the weather and system conditions. InnPower always has at least two line employees, one supervisor and one customer service management support on call for emergencies. Additional staff, as well as third party contractors were called in as more outages occurred. Major outages occurred throughout our area on December 11, 2021 at 14:45 due to high winds causing extensive tree contacts and three broken poles. We cleaned up and restored power as fast as possible by calling in additional resources to support restoration efforts. Orangeville Hydro Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 4612 23 7 No Yes Others No Yes Yes InnPower is keep improving its reliability through the vegetation management program and also adding smart devices in the field for better and faster restoration. Lakeland Power Distribution Ltd. Lakeland Power Distribution Ltd. 2021 2021-11-17T10:27:22 2021-09-22T00:00:00 2:33 am No Loss of Supply Loss of Supply Yes, used IEEE Standard 1366 Yes 3415 24 8 Yes No Others No Lakeland Power is meeting with Hydro One in December 2021 to review and assess how we can together improve the reliability in our service area. London Hydro Inc. London Hydro Inc. 2021 2021-10-29T10:40:22 2021-09-12T00:00:00 10:11 PM Yes Environment Canada issued a severe thunderstorm warning for Southwestern Ontario. London Hydro did have extra London Hydro employees on duty during the storm. London Hydro did bring in additional contractors to assist in restoration activities during the storm. Severe thunderstorms, accompanied by high winds and lightning, passed through London Hydro's distribution area on September 12, 2021 at around 10pm. The resulting high wind from the storm knocked down several trees throughout the region that damaged various hydro poles and power lines. The major event started at 10:11pm on September 12th, and over 90% of customers were restored by 3:52am on September 13th. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 8004 4.90000009536743 6 No No Others No Yes No London Hydro will be looking to complete a risk analysis based on field inspections of trees that have adequate clearances from the lines, but could have severe impacts to reliability if the entire tree or large portions of it were to come down. Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2021 2021-01-11T15:04:17 2020-11-15T00:00:00 03:19 AM No On November 15, 2020, Newmarket-Tay Power’s service territories experienced high winds and heavy rain, causing two supply authority station feeder circuit breakers to lock-out. The first event occurred at 3:19 PM in the Town of Newmarket and was restored in 1.03 hours. Approximately an hour after the restoration of the first event, a second feeder lock-out occurred in the Township of Tay. The restoration time of this event was 1.67 hours. The total event duration was 4.02 hours. However, there was a 1.05-hour interval between the restoration of the first outage and the beginning of the second outage where no customers were interrupted. Loss of Supply No, used fixed percentage (i.e., 10% of customers affected) Yes 5828 13.1999998092651 4 Yes No No further action is required at this time No Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2021 2021-10-13T11:31:51 2021-09-07T00:00:00 6:44 PM No On September 7, 2021, Newmarket-Tay Power’s service territories experienced severe thunderstorms, causing one supply authority station feeder circuit breaker to lock-out in the Town of Newmarket. In addition, high winds and rain caused trees to fall on primary circuits across its Newmarket service area, which resulted in three distributor owned station feeder breakers to lock-out. 100% were restored in 2.73 hours. Loss of Supply No, used fixed percentage (i.e., 10% of customers affected) Yes 7012 16.7000007629395 2 Yes No Process improvements No Increased tree trimming in the areas affected by the outage. Niagara-on-the-Lake Hydro Inc. Niagara-on-the-Lake Hydro Inc. 2021 2021-11-10T16:09:42 2021-10-09T00:00:00 01:49 AM No This was an unanticipated loss of supply from the transmitter. In September, NOTL Hydro was informed by Hydro One that an outage would be required on the Q11S in October for maintenance work. The Q11S feeds the NOTL station. To avoid the transmission double billing, which would have cost our customers $80k, the NOTL station was taken offline for the month and all the load was put on our York station which is fed by the Hydro One Q12S. In the early morning of October 9, 2021, the Q12S went down creating an outage for the full Town. The decision was immediately made to transfer all the power to the NOTL station even though the $80k cost would now be incurred. If not for the OEB rules on transmission billing the Town would have been fed by both stations on October 9, 2021, so the outage would have only been half the Town and the restoration time would have been much quicker. Loss of Supply Yes, used IEEE Standard 1366 Yes 9930 100 1 Yes No Others No The only reason this event created an outage for the full Town of NOTL was due to the Ontario Energy Board rules. Distributors such as NOTL Hydro are billed for transmission based on the peak loads at each of their delivery points instead of the overall u North Bay Hydro Distribution Limited Espanola Regional Hydro Distribution Corporation 2021 2021-03-26T09:39:20 2021-03-11T00:00:00 13:00 No none N/A On March 11, 2021 Espanola experienced a period of extreme winds in the afternoon. none Adverse Weather-Wind No, used fixed percentage (i.e., 10% of customers affected) No 705 20.7999992370605 4 Yes No No further action is required at this time No none North Bay Hydro Distribution Limited Espanola Regional Hydro Distribution Corporation 2021 2021-09-07T10:38:46 2021-08-11T00:00:00 15:36PM No N/A On August 11, 2021, severe thunderstorms moved across all of Northern Ontario. These major thunderstorms caused major outages to Hydro One which in turn caused a Loss of Supply for ERHDC at approximately 15:46pm. It took about 10 minutes for 90% of customers to have their power restored. Loss of Supply No, used fixed percentage (i.e., 10% of customers affected) No 3375 100 0 Yes No No further action is required at this time No n/a Oshawa PUC Networks Inc. Oshawa PUC Networks Inc. 2021 2021-07-13T11:04:42 2021-05-26T00:00:00 22:09 No N/A N/A Hydro One Thornton transformer station is supplied by two 230 kV circuits, T24C & T26C respectively. On May 26, 2021, the T26C 230 kV circuit was out of service for planned insulator replacement work. At 22:09, Hydro One's T24C 230 kV circuit was automatically removed from service, initiated from a customer equipment protection trip. This resulted in a complete loss of supply to Thornton transformer station and two Oshawa Power municipal stations (MS5 & MS11). Precisely, 10,554 customers were affected by this power outage. All of Hydro One's high voltage transformer customers were contacted by the Ontario Grid Control Centre and requested to isolate from the grid. Once all customers confirmed they were isolated from the grid, T24C was energized (with no load) from Clarington transformer station at 23:16. Load restoration commenced in stages: Thornton transformer station energized at 23:28, Oshawa G.M. station at 23:31 and Whitby station at 23:36. In addition, at 23:36, other customer loads were in the process of being restored. N/A Loss of Supply Yes, used IEEE Standard 1366 Yes 10554 17.6000003814697 1 Yes No Process improvements No No No I. Oshawa Power will request incident investigation reports from Hydro One following all major loss of supply outages to ensure remedial actions are taken to prevent similar incidents from occurring in the future. II. Oshawa Power has requested Hydro One PUC Distribution Inc. PUC Distribution Inc. 2021 2021-07-29T13:56:46 2021-06-18T00:00:00 14:39 No The cause of the major event was a motor vehicle accident. Foreign interference event on June 18th was consistent with the OEB definition of "Major Event" (as set out in Section 2.1.4.2 of the OEB's Electrical Reporting and Recording Keeping Requirements). A motor vehicle accident at the intersection of market St and South Market caused extensive damage to multiple poles that caused an outage to PUC's 35Kv system and the 12Kv system. 9.5% of customers effected and approximately 2 hours and 22 minutes to restore 90% of our customers power. Others Yes, used IEEE Standard 1366 No 3215 9.5 2 No No Others No Outage review meetings are being held and mock outages are part of an ongoing action plan to try and improve outage times and staff proficiency. PUC Distribution Inc. PUC Distribution Inc. 2021 2021-09-07T10:43:54 2021-08-11T00:00:00 17:18 No n/a On August 11, 2021, severe thunderstorms moved across all of Northern Ontario. These major thunderstorms caused major outages to Hydro One which in turn caused a Loss of Supply for ERHDC at approximately 17:18pm. 100% of the customers were without power from 17:18 to 17:34. At that time 84% of customers had their power restored with the remaining customers restored at 18:32. Loss of Supply No, used fixed percentage (i.e., 10% of customers affected) No 3375 100 0 Yes No No further action is required at this time No n/a PUC Distribution Inc. PUC Distribution Inc. 2021 2021-09-13T13:32:01 2021-08-29T00:00:00 12:40 No Lighting event on Aug 29th is consistent with the OEB definition of “Major Event” (as set out in Section 2.1.4.2 of the OEB’s Electrical Reporting and Record Keeping Requirements). Lightning Yes, used IEEE Standard 1366 No 10255 28.5 3 No No No further action is required at this time No Post outage review meetings are held after any major event outages are part of an ongoing action plan to try and improve outage times and staff proficiency. Sioux Lookout Hydro Inc. Sioux Lookout Hydro Inc. 2021 2021-07-22T12:38:31 2021-06-23T00:00:00 07:49 PM No Sioux Lookout experienced a severe storm on June 23, 2021. Comments on 4. Staff is trained to respond to storms. Management is responsible for implementing the Mutual Assistance Agreements when deemed necessary. On June 23, 2021 Sioux Lookout experienced a severe storm that environment Canada classified as a downburst. Winds were gauged at approximately 111 km/hour and the Municipality declared a state of emergency. The storm caused significant damage to all areas of our service territory and resulted in numerous downed trees on power lines, broken poles and downed lines. Synergy North Hydro One Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 2883 100 41 No Yes Process improvements No Sioux Lookout Hydro will investigate any process improvements that could be implemented as a result of this experience based on debriefing meetings with operations staff. This was the first time the Northwest has utilized its Mutual Assistance Agreement. Wellington North Power Inc. Wellington North Power Inc. 2021 2021-01-08T15:49:16 2020-12-16T00:00:00 2:44 PM No Wellington North Power Inc. did not have prior warning that the Major Event would occur. The cause of interruption was Cause Code 2: Loss of Supply. As a result of downed tree on the Transmission Line from Hydro One’s Transmission Station at Hanover, there was a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). During the Loss of Supply, WNP’s service territory of Mount Forest was without power. Actual restoration time was 2 hours 48 mins Loss of Supply Yes, used IEEE Standard 1366 Yes 2001 52 2 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Wellington North Power Inc. Wellington North Power Inc. 2021 2021-06-01T10:14:09 2021-05-04T00:00:00 11:04 am No As a result of broken equipment at Hydro One’s Transmission Station at Hanover, there was a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). During the Loss of Supply, WNP’s service territory of Mount Forest was without power. Restoration time was 1 hour 23 minutes Loss of Supply Yes, used IEEE Standard 1366 Yes 935 24 1 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Wellington North Power Inc. Wellington North Power Inc. 2021 2021-10-04T14:14:36 2021-09-07T00:00:00 5.27 pm Yes Wellington North Power Inc. did have prior warning that there could possibly be wide-spread power outages due to the extreme weather conditions – wind, hail and rain. The LDC did not arrange for extra employee as all the line-crew members were already on standby to be called-in in the event of outages. On the afternoon, the Operations team prepared equipment including fueling trucks and checking chainsaws. The cause of interruption was Cause Code 2: Loss of Supply. Supply feed from both Hydro One’s Hanover Transmission station and Palmerston Transmission station were interrupted resulting in a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). During the Loss of Supply, WNP’s service territory of Mount Forest and Holstein was without power. The Loss of Supply was likely due to the adverse weather. Prior to and during the Loss of Supply, there was extreme weather consisting of wind, hail and rain. It was later reported that a tornado had touched down south of Mount Forest Restoration took 6 hours and 47 mins (407 minutes) Loss of Supply Yes, used IEEE Standard 1366 Yes 2801 71 7 Yes No No further action is required at this time No No No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Wellington North Power Inc. Wellington North Power Inc. 2021 2021-10-04T14:24:54 2021-09-14T00:00:00 10:33 pm No The cause of interruption was Cause Code 4: Lightning. There was a suspected lightning strike on the LDC’s 44kV line in north of Mount Forest causing an arrester to fail which resulted in power outages to customers served by Wellington North Power (WNP) in the areas of Mount Forest and Holstein. Because this lightning strike occurred on a 44kV power line, the line was de-energized to allow crews to make repairs. The line was de-energized to the source feed from Hydro One’s Hanover Transmission station which caused wide-spread outages to the surrounding areas. Hydro One (HONI) crews performed line-switching to restore power to non-LDC customers. Once WNP had made repairs to the line, ensuring it was safe, the LDC notified HONI and waited for the 44 kV line to be safely re-energized. 5 hours and 4 minutes (304 minutes). Lightning Yes, used IEEE Standard 1366 Yes 2805 71 5 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Wellington North Power Inc. Wellington North Power Inc. 2021 2021-11-29T14:11:22 2021-11-16T00:00:00 4:38 pm No Wellington North Power Inc. did not have prior warning that the Major Event would occur. The cause of interruption was Cause Code 2: Loss of Supply. Supply feed from Hydro One’s Hanover Transmission station was interrupted resulting in a Loss of Supply to embedded distributor Wellington North Power Inc. (WNP). During the Loss of Supply, WNP’s service territory of Holstein was without power as well as a portion of Mount Forest. The Loss of Supply was due to a broken Hydro One pole at Varney. Restoration time was 1 hour and 45 minutes Loss of Supply Yes, used IEEE Standard 1366 Yes 944 24 2 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Westario Power Inc. Westario Power Inc. 2021 2021-02-12T13:48:42 2020-11-15T00:00:00 01:45 pm No Westario Power did not have prior warning. This event was due to a Loss of Supply by Hydro One, our transmission partner. The Loss of Supply was the first indicator of an issue with power in the affected regions. As stated above, Westario Power did not have prior warning. With no advanced warning, no extra employees were engaged. However, the organization maintains standby schedule requiring supervisory and operational staff to be available on a 24/7 basis to support with event restoration. The event was consistent with the definition of a “Major Event” as set out in Section 2.1.4.2 of OEB’s Electricity Reporting and Record Keeping Requirements. This includes events that are beyond the control of the distributor, take significantly longer than usual to repair, and affect a substantial number of customers. The event was unforeseeable, unavoidable and unpreventable and Westario experienced greater than normal call volume. It took approximately 18 hours to restore 60% of the affected customers, and approximately 20 hours to restore 90% of the affected customers. Please note that customers were restored over multiple steps. Loss of Supply Yes, used IEEE Standard 1366 No 9613 40 20 Yes No No further action is required at this time No No No Through its Emergency Preparedness program, Westario Power develops, implements and sustains a state of emergency readiness and response proficiency. In addition, Westario’s asset renewal program reviews configuration of the distribution system and makes Alectra Utilities Corporation Alectra Utilities Corporation 2020 2020-01-22T00:00:00 2019-12-01T00:00:00 07:00 AM ( No. Weather alerts did not come until the time the storm occurred. No arrangements were made, since no prior warning was provided. Yes. Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its operational areas. The Emergency Plan is based on the Incident Management System (?IMS?) and requires training exercises to be conducted on an an Large ice accumulation over a prolonged period (Dec 1st from 6:00am to 12:00am) caused multiple wires to be down and equipment failures in several locations. At the peak of the ice storm (around 4:00pm), Alectra Utilities had 26,096 customers interrupted with over 91 outage events across Alectra Utilities? service territory. The total customer minutes of interruptions experienced on Dec 1st, 2019 (15.85 million customer minutes) exceeded the Major Event Day threshold of 2.97 million customer minutes. 90% of the customers were restored in 26 (twenty-six) hours (11:00am Dec 2nd) Yes, third parties were notified prior to the event and were required to assist in the restoration of power. Private electrical construction contractors and tree contractors were utilized. 1. Staff training is part of an ongoing process as per the Alectra Utilities Emergency Plan. New systems, such as an Incident Management System, have been rolled out as part of regular training. 2. Tree trimming practices are being reviewed. 3. Alectra Ut Alectra Utilities Corporation Alectra Utilities Corporation 2020 2020-11-03T11:15:03 2020-09-14T00:00:00 07:23 AM No The outage was caused by an event at Newton TS, a Hydro One-owned Transformer Station (TS). A squirrel contact at the station on “Y Bus” tripped both the “B3” and “B4” high voltage transmission circuits affecting other Hydro One-owned stations: Dundas TS, Newton TS and Mohawk TS. These stations are servicing Alectra Utilities customers in the City of Hamilton. Alectra Utilities customers that are connected to Dundas TS and Mohawk TS were out of power until HONI transmission circuits were restored. Some of the Newton TS loads were transferred to alternate feeders from other stations, however, further restoration by Hydro One within Newton TS was required in order to restore power to the remaining Alectra Utilities customers. Power to these remaining customers was restored by 11:36 AM DST. Question 5: 3.88% of Alectra Utilities' customer base Question 6: It took 3 hours and 23 minutes to restore 90% of the customers who were interrupted Dundas TS: 4,589 Customers experienced a momentary outage (<1 minute); Mohawk TS: 22,237 Customers were restored within 47 minutes; Newton TS: 14,445 Customers were restored within 3 hours and 23 minutes. Loss of Supply Yes, used IEEE Standard 1366 Yes 41271 4 3 Yes No Others No Alectra Utilities undertook further discussions with Hydro One in regard to Newton TS station assets, specifically the replacement plan and animal abatement plan. Newton TS is an outdoor station and will require further investments to address potential an Alectra Utilities Corporation Alectra Utilities Corporation 2020 2021-01-12T09:27:20 2020-11-15T00:00:00 01:00 PM Yes Environment Canada issued a wind warning for Toronto, Peel, and Halton regions. On Saturday, November 14, 2020, Alectra arranged to have additional Control Room staff on standby for Sunday, November 15 in anticipation of the adverse weather event. The additional staff were called in on Sunday, November 15. On November 15, 2020, high winds and rain caused trees outside of the right of way (ROW) to fall on primary circuits across the entire Alectra’s service territory. Long duration outages resulted, as trees were cleared and circuits were rebuilt. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 103486 10 11 Yes No No further action is required at this time No Yes Yes Algoma Power Inc. Algoma Power Inc. 2020 2020-01-23T00:00:00 2019-11-27T00:00:00 05:58 AM The only warning regarding the potential that the Major Event would occur were weather forecasts that predicted the potential for winter storm-like effects. Environment Canada issued a generalized Special Weather Statement prior to the onset of the deteriorating conditions. Not Applicable (N/A) API has a Business Continuity and Disaster Recovery Plan that is periodically updated and reviewed at the management level. This plan is designed to assist in the response to natural disasters, accidents, major outages, environmental disasters, municipal API considered this a Major Event due the uncontrollable nature of the storm?s intensity and the resulting substantial impact on API?s network and customer base. The magnitude of the number of interruptions and significant response required confirmed API?s perspective that this episode should be categorized as a Major Event. It took approximately 11 hours to restore 90% of the customers who were interrupted. For the outages affecting the remaining 10%, several had a duration longer than 24 hours. API did not utilize assistance through a third party mutual assistance agreement. All restoration efforts were carried out by API staff. A Forestry contractor already engaged in work for API had crews diverted to the restoration efforts. As with previous Major Events, API will engage representatives from all departments through a meeting to de-brief on all aspects of the Major Event ? including outage response, effective use of available resources and technological support. Algoma Power Inc. Algoma Power Inc. 2020 2020-02-27T16:07:13 2019-12-29T00:00:00 01:28 PM Yes Environment Canada published several Alerts regarding severe weather and its potential impacts. These alerts were the only warning of the potential for a Major Event. As the initial impact of the multi-day event unfolded (prior to the second MED day), the Supervisor On-Call recognized the increasing severity and started contacting staff that were on vacation and/or off for the weekend to mobilize all available resources – including a crew from the Wawa region of API’s service territory. In addition, two Forestry contractors working for API under ongoing contracts were contacted to leverage any resources they had available (as this was during the Christmas/New Years vacation season these contractors were on hiatus at the time). By the second day of the event, all of the crews that responded to the solicitation for assistance were deployed to the restoration efforts. On December 29th, a winter storm hit the API service territory east of Sault Ste Marie; primarily on St. Joseph Island. With mild temperatures hovering right around the zero-degree mark, precipitation that occurred during this and the following days had a heavy impact on the region. Significant periods of freezing rain and heavy, wet snow – combined with some episodes of gusty winds up to 50+ km/h – contributed to the overall impact of the storm. The freezing rain and snow caked on to trees; weighing them down to the point of bowing over to the ground or breaking off altogether. These trees impacted the power lines in the area, which resulted in many outages – multiple interruptions on the same feeders in some instances. The heavy snow and ice load on vegetation, coupled in some cases with some gusty winds, caused trees to fall onto power lines and cause damage and interruptions. If selected “Other”, please explain: As per Section 2.1.4.2.5 of the RRR filing requirements, the majority of the outages were coded as Tree Contacts (Code 3). This is not on the provided list of values above, so “Other” was selected. Some outages were coded as Adverse Weather (Freezing Rain/Ice – Code 6) so that option was also checked off. As crews triaged the areas of concern and focused their efforts for maximum effectiveness, large groups of customers were restored several times over the first two days of crew response only to lose power again as further tree contacts and damage occurred. Also, response times were hampered by the significant effort required simply to get to affected areas, as crews had to remove trees and debris from roads in order to pass through to the locations of some of the outages. The 90% threshold was finally achieved approximately 71 hours after the event started. Others Yes, used IEEE Standard 1366 Yes 4547 39 71 No No Others No Yes No As with previous Major Events, API will engage representatives from all departments through a meeting to de-brief on all aspects of the Major Event – including outage response, effective use of available resources and technological support. Algoma Power Inc. Algoma Power Inc. 2020 2020-02-27T16:18:19 2020-01-06T00:00:00 01:18 AM No Early on the morning of January 6th, multiple calls started coming in to report power off in a wide area north of Sault Ste Marie (Goulais and Batchawana). API Supervision along with staff from Hydro One attended the Goulais Substation and confirmed a Loss-of-Supply due to damage on one of the station transformers. Hydro One restored the Batchawana region through an alternate feed, while efforts to address the issue at the Goulais Substation continued. The Substation feed was off for the vast majority of the day, until a collaborative effort with Hydro One was successful in restoring all single-phase customers. The remaining customers were restored after more extensive repairs over subsequent days. API partnered with Hydro One to come up with a solution to restore all single-phase customers serviced from the Goulais Substation. Only 3-phase customers and a handful of other services off of a feed tied to 3-phase service remained off until full repairs could be accomplished at the substation – 37 services in total experienced the full duration of the event. Loss of Supply Yes, used IEEE Standard 1366 Yes 3829 31 23 Yes No Others No API has, and will continue to, engage with representatives from Hydro One to learn more about what occurred and work to identify any future strategies that would assist in mitigating the impact of subsequent interruptions. As well, API will facilitate a m Bluewater Power Distribution Corporation Bluewater Power Distribution Corporation 2020 2020-10-22T08:37:49 2020-09-07T00:00:00 12:36 AM No A storm passed through the area with significant lightening strikes. There was a lightening hit on our M26 breaker which caused the main outage. In addition there was a tree branch on a line that caused a smaller outage within the same time period. Lightning Yes, used IEEE Standard 1366 Yes 7299 19.7000007629395 2 No No No further action is required at this time No Burlington Hydro Inc. Burlington Hydro Inc. 2020 2020-04-15T15:58:26 2020-03-20T00:00:00 3:09 PM No The Weather Network did issue a wind warning but expected wind gusts were 70km/h which typically do not cause significant power outages. High winds caused a large tree limb to come into contact with primary feeder circuit. Tree limb was too large to be removed by line crews and tree trimmers were needed. Tree trimmers found tree was snapped at base and entire tree had to be taken down. An upstream switch on same feeder circuit had leads burn off. There was no way to back feed customers until repairs were completed. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 3880 6 8 No No Others No Burlington Hydro is reviewing the hardware which supports its Outage Management System to mitigate technical issues. This will ensure the public is notified in a timely manner on outages and ETRs. Burlington Hydro Inc. Burlington Hydro Inc. 2020 2020-08-26T10:16:56 2020-07-10T00:00:00 8:01 PM Yes Weather forecast indicated potential for severe thunderstorms, high winds and lightning. Additional field and Control Room staff were on standby prior to the Major Event beginning. Severe thunderstorm with high winds caused multiple tree contacts throughout Burlington. Several very large trees fell onto primary conductor. Significant work involved to remove fallen trees, replace broken poles and repair primary conductor. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 3616 5 9 No No No further action is required at this time No Yes Yes Burlington Hydro Inc. Burlington Hydro Inc. 2020 2020-08-26T12:08:57 2020-07-19T00:00:00 10:19 AM Yes Weather forecast indicated potential for severe thunderstorms, high winds and lightning. Additional field and Control Room staff were on standby prior to the Major Event beginning. Severe thunderstorm with high winds caused multiple tree contacts throughout Burlington. The majority of customers affected were due to one outage caused by a large tree limb that broke and fell onto primary conductor locking out two primary 27.6kV feeders. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 8450 12 2 No No No further action is required at this time No Yes Yes Elexicon Energy Inc. Elexicon Energy Inc. 2020 2020-03-09T10:31:07 2020-01-25T00:00:00 02:00 AM Yes The Major Event was due to a loss of supply from Hydro One. Less than 48 hours prior to the outage, Elexicon Energy received a call from Hydro One advising of urgent emergency repair work that was required at the Belleville Transmission Station which would affect over 10,000 Hydro One customers and over 17,800 Elexicon Energy customers within the City of Belleville. On short notice, Elexicon Energy worked with Hydro One to minimize impact to customers and to coordinate communication efforts. The outage was scheduled outside of regular business hours from approximately 2:00 – 4:30 am on a Saturday morning. The following extra employees were in place during the scheduled outage: • 4 Line staff plus 1 Supervisor • 1 additional Control Room Operator • 3 Customer Experience staff • 1 Corporate Communications Representative The Major Event was due to a Loss of Supply from Hydro One. On short notice, Hydro One was required to conduct emergency repair work to replace damaged equipment at Belleville Transmission Station which serves Hydro One customers along with Elexicon Energy customers in Belleville and the surrounding area. Due to the location of the damaged equipment, the station had to be de-energized while crews completed the critical work. The work was completed in advance of a winter storm that was anticipated in order to eliminate the risk of further damage and a more prolonged outage. Please be advised for question 6., the actual hours it took to restore 90% of the customers who were interrupted was 2.5 hours. Loss of Supply Yes, used IEEE Standard 1366 Yes 18071 11 2 Yes No Others No Yes Yes The topic of a single supply station (Belleville TS) with no backup has been identified and is included in the current OEB Regional Planning discussions for this region. Elexicon Energy Inc. Elexicon Energy Inc. 2020 2020-09-10T12:57:37 2020-07-19T00:00:00 11:45 AM Yes Environment Canada issued a Severe Thunderstorm Warning for Pickering, Whitby and Ajax areas, and a Tornado Watch in Gravenhurst. Normal Elexicon on-call staff were available to assist. Additional Contractor staff were on standby to assist if required. Elexicon Energy experienced high winds and rain in a number of areas it services on July 19. Tree contacts with conductors produced a number of customer outages or resulted in loss of supply for Elexicon customers. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 17989 11 8 Yes No Process improvements No Yes No A power restoration drill will be scheduled before the end of 2020 to further improve coordination of resources and staff during larger scale power outage events. Elexicon is also in the process of updating its power restoration plan in Q3/Q4 2020 and wil Elexicon Energy Inc. Elexicon Energy Inc. 2020 2020-11-24T09:00:03 2020-10-23T00:00:00 5:55:00 PM Yes Storm warnings received late afternoon Friday Oct 23. Additional control room staff brought in. Notification to staff of possible need for extra help due to storm damage. N/A Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 2614 2 18 Yes No Process improvements No Yes Yes Improvements will be pursued related to streamlined local outage management Enova Power Corp. Kitchener-Wilmot Hydro Inc. 2020 2020-01-24T09:08:35 2019-12-01T00:00:00 06:18 AM Environment Canada issued alerts warning of possible inclement weather the day prior to the event. Regular on-call operational resources were in place prior to the event. Arrangements for additional staff on duty or on standby were not made for this event. KWHI Operations staff are provided job-related training and are on-call or on standby as part of their regular employment. This ensures that staff are available 24/7 and are prepared to respond quickly to address outages of varying magnitude. Applicable s The wind/ice storm on December 1st meets the definition of a Major Event as defined by the Ontario Energy Board (OEB) in Section 2.1.4.2 of the OEB’s Electricity Reporting and Filing Requirements. That is, the event is “beyond the control of the distributor and is unforeseeable; unpredictable; unpreventable; or unavoidable.” The impact to the distribution system as a result of high winds and freezing rain was unavoidable. Wind speed gusted at 74 km/h resulting in several broken tree branches coming in contact with the power lines and galloping of conductors in some areas causing widespread outages. Using the Institute of Electrical and Electronics Engineers (IEEE) Standard 1366, the calculated KWHI threshold for a major event (TMED) for 2019 is 4.76 minutes/customer. The impact of this event was 9.22 minutes/customer which exceeds the TMED. The primary cause for the outages was the ice build-up and the high winds in the morning, and trees falling on lines. It took 6 hours to restore 90% of the customers. Additional resources through our Mutual Assistance Plan or by Contractor were not required for this event. While KWHI’s response to the Major Event was successful there are areas of improvement that the organization continues to explore to be able to better respond to the next event. The following steps are being taken: o Exploring the feasibility of having a Enova Power Corp. Kitchener-Wilmot Hydro Inc. 2020 2020-09-17T08:56:03 2020-07-19T00:00:00 12:00 PM No There was a tornado warning issued by Environment Canada at 11:36 AM. There were short but intense winds gusting up to 93 mph, accompanied by rain, and lightning. The result was extensive outages within the North-East section of KWHI’s service territory. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 6881 7 4 Yes No No further action is required at this time No Enova Power Corp. Waterloo North Hydro Inc. 2020 2020-09-01T14:30:17 2020-08-14T00:00:00 09:06 AM No A Motor Vehicle Collison (MVC) occurred on August 14, 2020 on Union Street East near Moore Avenue in Waterloo, Ontario. The driver was the sole occupant of the vehicle which collided with a hydro pole causing it to sever. The accident ended in a fatality, no electrical contact occurred. As a result of the MVC, the secondary conductors came in contact with neighbouring tree branches, which ignited a small fire. Subsequently, the collision caused a power outage to surrounding areas while Waterloo North Hydro Inc. (WNH) made the scene safe by dropping multiple feeders and ensured the area would remain safe until emergency personnel completed their duties. Waterloo Regional Police Services closed the road in order to make the scene safe and to perform an investigation. A Motor Vehicle Collison (MVC) occurred on August 14, 2020 on Union Street East near Moore Avenue in Waterloo, Ontario. The driver was the sole occupant of the vehicle which collided with a hydro pole causing it to sever. The accident ended in a fatality, no electrical contact occurred. As a result of the MVC, the secondary conductors came in contact with neighbouring tree branches, which ignited a small fire. Subsequently, the collision caused a power outage to surrounding areas while Waterloo North Hydro Inc. (WNH) made the scene safe by dropping multiple feeders and ensured the area would remain safe until emergency personnel completed their duties. Waterloo Regional Police Services closed the road in order to make the scene safe and to perform an investigation. Others Yes, used IEEE Standard 1366 Yes 4785 8 2 No No Others No WNH has implement a number of grid modernization technologies and will continue to do so to increase system reliability and operational efficiencies. An example is Survalent’s Fault Location, Isolation, and Service Restoration (FLISR) software application EPCOR Electricity Distribution Ontario Inc. EPCOR Electricity Distribution Ontario Inc. 2020 2020-10-20T08:18:35 2020-08-29T00:00:00 12:29:PM No EPCOR Electricity Distribution Ontario had NO prior warning. The tree that fell peeled off at the base or trunk due to internal rot which is very difficult to predict or prevent. This tree took down several other trees in its path closer to the line. Additionally, as a result of a tree contact in June 2019 EPCOR Electricity Distribution Ontario had additional tree trimming and visual inspection completed in this specific area. This additional works resulted in a much expanded tree to power line separation with NO visual decay observed. The Cause of Interruption was identified as Cause Code 3.2: Tree Contact Unpreventable On Saturday, August 29th after a prolonged period of heavy rainfall and substantial wind a tree fell and made contact with a major 44Kv feeder and a 4Kv underbuild feeder. The contact resulted in a direct fault on the M3 44Kv circuit as well as the MS # 2. Feeder #1 - 4kV circuit. The outage affected 9841customers which is approximately 54.3% of the entire customer base. 9087 customers or 92.3% of those interrupted were restored at 2:06 PM (1.62 hours) Yes, EPCOR Electricity Distribution Ontario is part of the Cornerstone Hydro Electric Concepts Association Inc. Emergency Mutual Assistance Agreement. 18 Ontario distributors are members of this Association. Note: EPCOR Electricity Distribution Ontario di Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 9841 54 2 No Yes System upgrades No EPCOR investigated the possibility to either relocate existing overhead switch locations or add additional switches to normally isolate this portion of the line in the summer given the residual risk of tree contact. A review with Hydro One has projected c Hydro One Networks Inc. Hydro One Networks Inc. 2020 2020-08-26T11:01:22 2020-06-10T00:00:00 11:13PM Yes Use of IBM Predication Software and Weather Monitoring. N/A N/A June 10, 2020 commencing at 11:13PM to June 12, 2020 ending at 11:13PM K-Line, Peterborough Utilities, Orillia Power, Niagara Peninsula Energy, Entegrus and Blue Water Power Adverse Weather-Wind No, used fixed percentage (i.e., 10% of customers affected) Yes 216000 15 48 No Yes Process improvements No Yes Yes Hydro One continues to proactively prepare for each Major Event by conducting briefings throughout the event and lessons learned sessions to specifically improve damage assessment, ETR accuracy and customer satisfaction. At the same time, a major processe Hydro Ottawa Limited Hydro Ottawa Limited 2020 2020-06-25T08:34:52 2020-03-07T00:00:00 02:23 AM No There was no prior warning to this Major Event occurring. An overhead transition on a pole (pothead) failed and caused a fault condition. A fire occurred at Lincoln Heights TD station as a result of the circuit breaker failing to fully interrupt the fault condition. To restore all customers supplied by Lincoln Heights TD station, the station fire had to be suppressed, the situation needed to be made safe, new circuit ties had to be completed, and equipment was re-tested prior to energization. Others Yes, used IEEE Standard 1366 Yes 11686 3 26 Yes No Others Yes There will be continued focus on on-call and emergency response preparation. Hydro Ottawa Limited Hydro Ottawa Limited 2020 2020-12-10T10:27:30 2020-10-18T00:00:00 02:00 AM Yes A dedicated switching crew was arranged to keep the outage time as minimal as possible. The outage which caused the Major Event was due to a planned Loss of Supply from Hydro One which affected 3 Hydro Ottawa stations. Hydro Ottawa had prior warning to this event. There was also an outage due to defective equipment on the same day. Loss of Supply Yes, used IEEE Standard 1366 Yes 9186 3 7 Yes No No further action is required at this time No Yes No InnPower Corporation InnPower Corporation 2020 2020-06-05T08:20:10 2020-05-26T00:00:00 5:51:00 PM Yes InnPower was aware that there was active weather coming, as its system control group continually monitors the weather and system conditions. InnPower always has at least two line employees on call for emergencies. As the intensity of the storm increased over Barrie, InnPower strengthened these forces by calling additional staff in to remain on standby as required. One of InnPower's main 44,000 V supplies from Hydro One started indicating over 2000 amperes on the red and white phases and this feeder was removed from service. After patrolling in lightning and near whiteout conditions due to the rain and close to a foot of localized flooding, crews located a downed 44,000 V line on the 6th line. It was reported that lightning had struck the pole, carried the current through the line and broke the wire off the insulator causing one phase to fall into another. Crews started making repairs here while other team members continued to assess other outages and respond to customer inquiries. Over the course of the night a pad mount transformer had also failed needing to be replaced and a feeder serving Salem, McKay, Veterns, 4th line etc. was found locked out. At around 2:30am, the same 44,000 V supply from Hydro One locked out yet again. The team quickly came up with a plan to divide and conquer by patrolling in sections and troubleshooting by looking at fault currents and impedances. It was estimated that the fault was to be 10-15 km from the demarcation point from Hydro One around the Cookstown area. The team was able to identify a faulted arrestor in the Cookstown area and quickly worked to isolate the section of line and ensure the site was left safe. All power restored at 3:46am. Lightning Yes, used IEEE Standard 1366 Yes 9344 49 5 No No System upgrades No Yes Yes More lightning arrestors in areas of high lightning vulnerabilities (data as mapped and analyzed from GIS system). Lakeland Power Distribution Ltd. Lakeland Power Distribution Ltd. 2020 2020-07-17T15:40:33 2020-06-10T00:00:00 7:37 pm No Environment Canada declared this a level 1 tornado. Level 1 Tornado Orillia Power Distribution, Orangeville Hydro and Wasaga Distribution. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 6499 47 5 Yes Yes Others No Lakeland Power is meeting with Hydro One this summer to review and assess how we can together improve the reliability in our service area. Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2020 2020-08-25T09:29:23 2020-07-24T00:00:00 12:03 PM No N/A N/A 100% were restored in 0.1 hours. Loss of Supply No, used fixed percentage (i.e., 10% of customers affected) Yes 10617 24 1 No No No further action is required at this time No N/A Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2020 2020-09-16T20:43:06 2020-09-04T00:00:00 2:59 PM No N/A Transmitter reported high winds caused a tree contact on overhead feeder line supplying Newmarket-Tay Power service area. 100% were restored in 2.05 hours Loss of Supply No, used fixed percentage (i.e., 10% of customers affected) Yes 7923 18 2 Yes No No further action is required at this time No Major Event was due to tree contact on transmitter owned equipment, therefore no further action is required by NT Power at this time. Oakville Hydro Electricity Distribution Inc. Oakville Hydro Electricity Distribution Inc. 2020 2021-05-25T09:09:06 2020-07-19T00:00:00 12:40 PM Yes A special weather statement was issued from Environment Canada (risk of severe thunderstorms) for Oakville and surrounding areas. “Severe thunderstorms are possible today as a cold front approaches from the west”, read the statement. Additional skilled personnel on-call On Sunday July 19, 2020 the Town of Oakville sustained a severe, fast moving storm. The Town sustained over 400 lightning strikes, high winds, wind gusts and rain downpours. Oakville’s Forestry Department received 50 downed tree calls from residents. The extent of damage created safety alarms across the grid, limiting our ability to restore power to outages remotely. Crews needed to visit the site of each alarm to perform repairs and verify safe electrical operations. Lightning Yes, used IEEE Standard 1366 Yes 6163 8 8 No No System upgrades No Yes Yes Continuous improvement to our inspection program to determine corrective action on assets that could be affected by inclement weather. In addition, focusing on automation for quicker response time for interruptions. PUC Distribution Inc. PUC Distribution Inc. 2020 2020-02-21T15:47:07 2019-12-30T00:00:00 17:37 Yes Yes, the weather forecast indicated high winds and snow Yes, PUC had prior warnings and had employees on standby. This major event occurred on December 30th, where we had a full complement of staff working. Winter wind, snow and ice storm 21km winds, freezing rain caused major damage to trees with ice build up Yes, mutual assistance was utilized from staff and equipment from Espanola Hydro during the outage. PUC also contracted tree arborist external parties to assist us, 17 Trees Inc. and Asplundh, to deal with the falling/ damaged trees. Adverse Weather-Freezing rain/Ice storm Yes, used IEEE Standard 1366 No 21913 65 45 No Yes Process improvements No Yes No A process improvement committee was developed to determine if improvements could be learned from this outage. PUC Distribution Inc. PUC Distribution Inc. 2020 2020-11-20T15:56:00 2020-09-29T00:00:00 04:15 PM Yes The weather forecasted heavy rain and wind. This major event occurred on September 29th in which we had a full complement of staff working. September 29th 2020 at 4:15 pm, Sault Ste Marie experienced heavy rain and moderate winds that PUC believes is the contributing factor to the outage that triggered a Major Event which meets the definition of Adverse Weather as outlined in table 15.2 in section 2.1.4.2.5 of the Electricity Reporting and Record Keeping Requirements. It took approximately 2.5 hours to restore 90% of the customers who were interrupted. Adverse Weather-Wind Yes, used IEEE Standard 1366 No 15597 46 3 No No Others No Yes No Outage review meetings are being held, and mock outages are part of an ongoing action plan to try and improve outage times and staff proficiency. Toronto Hydro-Electric System Limited Toronto Hydro-Electric System Limited 2020 2020-09-04T14:43:24 2020-07-08T00:00:00 14:43 PM No Toronto Hydro did not have prior warning of the adverse weather event (the “Major Event”). Environment Canada issued an alert for a Tornado Watch at 2:53 pm on July 8, 2020. Toronto Hydro started experiencing outages between 3:00-3:30 pm thereafter. Once the utility became aware of Environment Canada’s alert, it deployed crews, from its Trouble Response, Forestry and Control Centre departments, to assist with the storm response. In addition, a number of employees from the Customer Care department were deployed to handle customer calls. Lastly, on a general basis, Toronto Hydro maintains a standby schedule requiring senior management, supervisory and operational staff to be readily available on a 24/7 basis to support with event restoration. Environment Canada issued an alert for a Tornado Watch at 2:53 pm on July 8, 2020. Toronto Hydro started experiencing outages between 3:00-3:30 pm thereafter. The restoration took approximately 5 hours and 26 minutes to restore 90% of the customers that were interrupted. Adverse Weather-Wind Yes, used IEEE Standard 1366 Yes 54253 7 5 No No Others No Toronto Hydro monitors the weather through email notifications from the Provincial Emergency Operations Centre, Environment Canada and The Weather Company weather notification application. Toronto Hydro's response to this type of Major Event i.e. an adver Wasaga Distribution Inc. Wasaga Distribution Inc. 2020 2020-11-24T12:46:03 2020-10-23T00:00:00 17:44 Yes Wasaga Distribution staffs were aware of tornado warning issued by Environment Canada shortly before the event. The warnings were issued for the immediate area through the “Alert Ready” – National Public Alerting System. Regular after-hours crews were on high alert, along with management staff. On October 23, 2020, Environment Canada issued tornado warnings to several regions in Ontario at around 3:30 pm. The warnings included damaging wind gusts, lightning, and the risk of a tornado. The event happened at 5:44 pm on the same day, caused by a large tree that snapped in half contacting the 44kV lines. At the time of the event, the system was fed by one 44kV feeder. Therefore, this tree contact caused most customers to lose power for approximate two and half hours. After a significant investigation, Wasaga Distribution has concluded that the tree contact was caused by the strong winds. The duration of the interruption could have been reduced, however, Hydro One required additional line patrolling to verify lines were clear prior to restoring power to the Hydro One 44 kV feeder. Adverse Weather-Wind Yes, used IEEE Standard 1366 No 13603 97 3 No No Staff Training No No No Wellington North Power Inc. Wellington North Power Inc. 2020 2020-12-09T14:02:21 2020-11-05T00:00:00 6:10 PM No Wellington North Power Inc. did not have prior warning that the Major Event would occur. The cause of interruption was Cause Code 2: Loss of Supply. Hydro One forced the M5 feeder at its’ Hanover Transmission Station (TS) from service in response to reports from Emergency Management Services of a motor vehicle striking a hydro pole with people trapped in vehicle and wires down across vehicle. As per process, for public safety, the M5 feeder remained isolated until line crews arrived on site and made the area safe. As an embedded distributor, Wellington North Power Inc. (WNP), is fed from the Hanover TS. During the Loss of Supply, WNP’s service territory of Holstein and parts of Mount Forest were without power. Restoration time was 2 hours and 38 minutes (158 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 904 23 3 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Wellington North Power Inc. Wellington North Power Inc. 2020 2020-12-09T14:09:47 2020-11-15T00:00:00 2:27 PM No Wellington North Power Inc. did not have prior warning that the Major Event would occur. The cause of interruption was Cause Code 2: Loss of Supply. As a result of failure of Hydro One’s equipment, there was a Loss of Supply to embedded distributor, Wellington North Power Inc. (WNP). During the Loss of Supply, WNP’s service territory of Arthur was without power. On this day, strong winds of over 100 km/h were gusting through Central and Southern Ontario. Hydro One declared a Level 2 Emergency Storm as high winds continued to hammer Southern Ontario and the mid-north. Restoration time was 6 hours and 49 minutes (649 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 1129 29 7 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Wellington North Power Inc. Wellington North Power Inc. 2020 2020-12-11T16:52:30 2020-01-11T00:00:00 5:39 PM No Wellington North Power Inc. did not have prior warning that the Major Event would occur The cause of interruption was Cause Code 2: Loss of Supply. Hydro One’s Fergus Transmission Station (TS) M1 feeder was locked out causing power outages to customers and distributors supplied by this feeder. As an embedded distributor, Wellington North Power Inc. (WNP), is fed from the Fergus TS. During the Loss of Supply, WNP’s service territory of Arthur was without power. Restoration time was 2 hours and 8 minutes (128 minutes) Loss of Supply Yes, used IEEE Standard 1366 Yes 1132 29 2 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Wellington North Power Inc. Wellington North Power Inc. 2020 2020-12-11T16:57:49 2020-01-12T00:00:00 2:09 AM No Wellington North Power Inc. did not have prior warning that the Major Event would occur. The cause of interruption was Cause Code 2: Loss of Supply. Hydro One’s Hanover Transmission Station (TS) 44kV line was affected by a downed tree on the line causing partial power to downstream customers and distributors supplied by this feeder. At the time, there was a severe ice storm with freezing rain in the region. As an embedded distributor, Wellington North Power Inc. (WNP), is fed from the Hanover TS. During the Loss of Supply, WNP’s service territory of Mount Forest had partial power. Restoration time was 6 hours and 45 minutes (405 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 1705 44 7 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Wellington North Power Inc. Wellington North Power Inc. 2020 2020-12-11T17:02:26 2020-03-17T00:00:00 10:05 AM No Wellington North Power Inc. did not have prior warning that the Major Event would occur. Hydro One forced a feeder at its’ Hanover Transmission Station (TS) from service in response to reports of a motor vehicle striking a hydro pole with people trapped in vehicle and wires down across vehicle. As per process, for public safety, the feeder remained isolated until line crews arrived on site and made the area safe. As an embedded distributor, Wellington North Power Inc. (WNP), is fed from the Hanover TS. During the Loss of Supply, WNP’s service territory of Holstein and parts of Mount Forest (east-side) were without power. Restoration time was 2 hours and 36 minutes (156 minutes). Loss of Supply Yes, used IEEE Standard 1366 Yes 809 21 3 Yes No No further action is required at this time No Wellington North Power Inc. will continue to forge good working relations with Hydro One Networks and the Ontario Grid Control Centre. Burlington Hydro Inc. Burlington Hydro Inc. 2019 2019-01-28T09:16:25 2018-01-08T00:00:00 09:10AM No. Burlington Hydro experienced power outages in multiple areas of the city, including Burloak Drive and Appleby Line. The outages were attributed to pole fires, caused by salt brine from the road accumulating on hydro poles over an extended period of cold weather. Burlington Hydro does take preventative measures to mitigate the risk of pole fires but had no prior warning of the changing weather conditions which contributed to these pole fires. N/A Yes. Burlington Hydro works safely to restore power to the largest areas first and then works its way down to single outages. Fire, police and wires down take priority. A total of 4.462 customers were affected by the outage representing 6.6% of Burlington Hydro's customers. The event was beyond Burlington Hydro's control and exceeded Burlington Hydro's daily SAIDI threshold used to identify a Major Event. It took 16.8 hours to restore 90% of the customers - they were restored on Jan 9th at 02:37AM. No Burlington Hydro is reviewing the hardware which supports its Outage Management System to mitigate technical issues in the future. This will ensure the public is notified in a timely manner on outages and ETRs. Burlington Hydro Inc. Burlington Hydro Inc. 2019 2019-01-28T09:49:48 2018-04-04T00:00:00 11:45AM No. Weather reports warned of high winds which were the only indication of a possible Major Event. N/A Yes. Burlington Hydro works safely to restore power to the largest areas first and then works its way down to single outages. Fire, police and wires down take priority. Strong winds with gusts up to 90 km/hour affected Burlington Hydro's service area beginning at 11:45am and were the major cause of outages. A total of 5,673 customers were affected representing approximately 8.5% of Burlington Hydro's customers. The event was beyond Burlington Hydro's control and exceeded Burlington Hydro's daily SAIDI threshold used to identify a Major Event. It took seven hours to restore 90% of the customers - they were restored by 19:00PM. Yes, Burlington Hydro utilized a third party contractor (K-line). Burlington Hydro is reviewing the hardware which supports its Outage Management System to mitigate technical issues in the future. This will ensure the public is notified in a timely manner on outages and ETRs. Burlington Hydro Inc. Burlington Hydro Inc. 2019 2019-01-28T11:36:16 2018-04-15T00:00:00 13:45PM Yes. Environment Canada warned of a multi-day ice storm with the potential to cause widespread power outages across Southern Ontario. Yes, Burlington Hydro arranged to have extra on call crew available and notified its third-party contractor to be on standby. Yes. Burlington Hydro works safely to restore power to the largest areas first and then works its way down to single outages. Fire, police and wires down take priority. Outages in Burlington Hydro?s service area, mainly due to downed wires and trees began at 13:45 and were the major cause of outages. A total of 6,038 customers were affected representing approximately 9% of Burlington Hydro?s customers. The event was beyond Burlington Hydro?s control and exceeded Burlington Hydro?s daily SAIDI threshold used to identify a Major Event. It took approximately 9.25 hours to restore 90% of the customers affected - they were restored by 23:00PM. Yes, Burlington Hydro used a third party contractor (K-line). Burlington Hydro is reviewing the hardware which supports its Outage Management System to mitigate technical issues in the future. This will ensure the public is notified in a timely manner on outages and ETRs. Burlington Hydro Inc. Burlington Hydro Inc. 2019 2019-11-18T10:00:47 2019-10-02T00:00:00 14:04 PM There was a minor alert from Environment Canada of mild thunderstorms with the potential to cause limited power outages across Southern Ontario. The previous day’s storm had weakened trees that subsequently fell. Existing Burlington Hydro on call crew was available. Additional Burlington Hydro crews and third party contractors (K-Line and Beswick) were notified and used in restoration activities after the severity of outages was realized. Yes. Burlington Hydro works safely to restore power to the largest areas first and then works its way down to single outages. Fire, police and wires down take priority. A total of 7,669 customers were affected by the outage representing 11% of Burlington Hydro’s customers. The event was beyond Burlington Hydro’s control and exceeded Burlington Hydro’s daily SAIDI threshold used to identify a Major Event. It took 5 hours and 34 minutes to restore 90% of the customers affected. Customers were restored at 20:38. Yes. Contractors K-Line and Beswick Tree Service were used. Burlington Hydro is reviewing the hardware which supports its Outage Management System to mitigate technical issues in the future. This will ensure the public is notified in a timely manner on outages and ETRs. Burlington Hydro Inc. Burlington Hydro Inc. 2019 2019-12-18T16:54:34 2019-12-01T00:00:00 10:40 AM Yes. The Weather Network issued a winter storm warning with the possibility of freezing rain and wind gusts. Freezing rain accumulation was predicted to be less than 5mm and wind gusts up to 70km/h. Existing Burlington Hydro on call crew was available. Additional Burlington Hydro crews and a tree trimming contractor (Beswick) was also on-call and available if needed. A major event was not expected based on the predicted freezing rain accumulation and wind gusts. Yes. Burlington Hydro works safely to restore power to the largest areas first and then works its way down to single outages. Fire, police and wires down take priority. A total of 17,768 customers were affected by the outage representing 26% of Burlington Hydro’s customers. The event was beyond Burlington Hydro’s control and exceeded Burlington Hydro’s daily SAIDI threshold used to identify a Major Event. It took 5 hours and 10 minutes to restore 90% of the customers affected. Customers were restored at 15:50 on Dec 1st. No Burlington Hydro is reviewing the hardware which supports its Outage Management System to mitigate technical issues. This will ensure the public is notified in a timely manner on outages and ETRs. Canadian Niagara Power Inc. Canadian Niagara Power Inc. 2019 2019-04-12T13:14:12 2019-02-24T00:00:00 01:21 PM On Friday February 22, 2019, Environment Canada issued wind warnings for much of Southern Ontario, indicating that damaging winds were expected on Sunday February 24, 2019. CNPI had a normal complement on-call during the overnight hours from Feb 24-26, with the ability to call in additional crews if required. Additional crews were made available for outage response on Feb 24, with many crews working into the evening to complete restoration. CNPI has a Business Continuity and Disaster Recovery Plan that is periodically updated and reviewed at the management level. This plan is designed to assist in the response to natural disasters, accidents, major outages, environmental disasters, municipal CNPI considered this a Major Event due to the extreme and uncontrollable nature of the wind?s intensity and the resulting substantial impact on CNPI?s network and customer base. The gusting of the wind in this area exceeded the criteria specified in CNPI?s distribution design standards and CNPI could not have reasonably designed its system to avoid all outages in this situation. It took approximately 11.5 hours to restore 90% of the customers who were interrupted by this Major Event. CNPI did utilize assistance through a third party mutual assistance agreement (NPEI), as well as we did utilize a private utility-based contractor(Gams & K-Line). CNPI conducted a round table discussion with contributors from the company operation departments, to review all facets of the Major Event, including the event itself, response and restoration efforts, resource allocation and technological assistance. Hydro One Networks Inc. Hydro One Networks Inc. 2019 2019-04-17T09:03:50 2019-02-24T00:00:00 01:07 PM Yes. We began monitoring the weather event on February 21st through our weather service provider, Environment Canada and other weather forecasters. The IBM Outage Prediction Tool suggested more than 1,200 weather impacted incidents within the 72 hour period and continued to climb to a peak of just under 1,900 on February 24th. Additional staff was scheduled by the Distribution Operations Management Centre ("DOMC") in preparation for this potential "High Incident" event. Yes, specific response plans for a Major Event are reviewed once a year with the Distribution dispatchers. The work instruction for storm management is posted on the DOMC internal website for quick reference during storm events. In addition, a Storm Team Hydro One categorizes a Major Event as one that impacts 10 per cent or more of its customers. This event impacted approximately 190,000 customers, or about 14 percent. At 11:35 AM on February 25th, a total of 35 hours and 35 minutes after the onset of the event, a switch on the Thunder Beach DS F1 feeder was restored, energizing 570 customers. This restoration brought the total number of customers restored up to 171,243, which represented the 90% threshold. Yes, One LDC (Niagara Peninsula Energy) provided mutual assistance during the storm. TWC Outage Prediction pilot program that was initiated in October 2017 has tested successful. Hydro One has decided to purchase this tool and is now customizing to enhance the demographic features. This web-based application provides the ability to foreca Hydro One Networks Inc. Hydro One Networks Inc. 2019 2019-12-20T09:36:37 2019-11-01T00:00:00 01:46 AM Yes. We began monitoring the weather event on Monday October 28th through our weather service provider, Environment Canada and other weather forecasters. The outage prediction tool as of 3pm on Tuesday October 29th was predicting 714 weather impact outages for the province. Additional staff was scheduled by the Distribution System Control in preparation for this event and conference calls was also setup to discuss proactive activities in key operational areas on Wednesday October 30th and Thursday October 31st. Yes, in preparation for the event, all related materials were reviewed by the management staff prior to the storm. Specific response plans for a Major Event are reviewed once a year with the Distribution dispatchers. The work instruction for storm managem Hydro One categorizes a Major Event as one that impacts 10 per cent or more of its customers. This event impacted approximately 233,000 customers, or about 17 percent. At 10:45 AM on November 3rd, after 58 hours and 45 minutes from the onset of the event, a switch on the Ivy Lea DS F3 feeder was restored energizing 5 customers. This restoration brought the total number of customers restored up to 209,126, which was about the 90% threshold. Yes, Alectra, PUC, Ottawa River Power and Lakefront Utilities provided mutual assistance during the storm. Hydro One has purchased the outage prediction tool and is now customizing to enhance the demographic features. This web-based application provides the ability to forecast weather and predict potential impact on the distribution system, which contains the Hydro One Networks Inc. Hydro One Networks Inc. - 1937680 Ontario Inc. (Peterborough Distribution) 2019 2019-11-25T15:07:48 2019-10-31T00:00:00 11:36 PM Yes. There were weather advisories that were in place in advance of the storm that warned of high winds and intense storm cells due to a cold front moving across the province. However, the potential impact of the storm was not expected to be as significant as a hurricane, tornado, or major ice storm. No extra employees were called on standby ahead of the storm. There was no clear indication that this storm would cause significant damage. We perform periodic test scenarios for major outages in our control centre to enhance our state of readiness. This event was a Major Event because of the intense windstorm with gusts up to 84 km/h that brought down several trees onto our lines. The repairs from this event took longer than usual to repair and affected a substantial number of customers. Multiple short duration outages occurred during this event. During the largest event that accounted for 17% of our customers, power was restored within 0.98 hours. No, additional assistance was not required. PDI has implemented a fault location, isolation, and restoration on our 27.6 kV distribution system. We have an annual program to add more faulted circuit indicators in order to help locate faults and restore power quicker. Our tree-trimming program has a Hydro One Remote Communities Inc. Hydro One Remote Communities Inc. 2019 2019-11-25T11:06:45 2019-09-20T00:00:00 15:00 Yes. Environment Canada and other weather forecasters provided a weather warning throughout the region. No additional staff were scheduled in advance of the storm. In the past, storms most often miss Remotes? communities since they are small and isolated. Yes, specific response plans for a Major Event are reviewed once a year with the on-call and trades staff. In addition, the Remotes Outage Committee meets monthly to review outages, responses and operational improvements in a continuous effort to gain exp Remotes categorizes a Major Event under IEEE (Section 3.5) with a threshold value of 2.1 SAIDI minutes/day. These unusual wind storms on September 20th and 21st impacted a significant number of our customers, resulting in a 3.4 SAIDI minutes/day that exceeded our threshold value. Power was restored to all customers at 18:30 hours on September 21st, resulting in an interruption lasting 27.5 hours. No. Remotes plans to explore its operational processes as well as mutual assistance agreements with Watay Power. Issuance of press releases, press conferences and social media notifications during these types of events will be more fully explored. Hydro Ottawa Limited Hydro Ottawa Limited 2019 2019-06-10T11:06:39 2019-04-15T00:00:00 00:56 There were three basic causes for the outages on April 15th. There were outages attributed to Lightning that was forecast. The distribution transformer outages due to Flooding were anticipated due to heavy rain forecast and spring melt runoff. The Nepean TS outage was unexpected Loss of Supply. During a planned Hydro One maintenance outage on the Nepean T3, the companion T4 transformer tripped from relay protection due to an internal fault. Hydro Ottawa had a full complement of on-shift personnel, and a full on-call roster of field technicians and management personnel. All Operations groups were notified of potential flooding at the Weekly On-Call meeting. Hydro Ottawa has an established Electrical Emergency Response Plan and Organization. Formal training is completed annually according to Market Rules, and a weekly preparation meeting is held to refresh on-call management personnel. This event was considered to be a Major Event Day based on the IEEE Standard 1366 method. The daily SAIDI value of 6.14 on April 15, 2019 exceeded the daily SAIDI threshold of 5.3, as determined by IEEE Standard 1366, based on the daily SAIDI values for the past five years. The total number of customer hours interrupted was 34,425. The Nepean TS outage was restored in 2 hours, 41 minutes. No third party assistance was necessary. No debrief of the event was held with stakeholders. There will be continued focus on on-call and emergency response preparation. Hydro Ottawa Limited Hydro Ottawa Limited 2019 2019-09-04T00:00:00 2019-07-05T00:00:00 11:56 AM There were several factors that caused this day to become a MED some of which were expected, some not. The heat and storm activity were forecast, but not expected to be impactive. The unexpected derating at Fallowfield by Hydro One in addition with planned work that was underway, constrained available alternative supplies to restore customers following the storm activity. Hydro Ottawa had a full complement of on-shift personnel, and a full on-call roster of field technicians and management personnel. All Operations groups were notified of potential weather related activity. The decision was made early in the day to keep all on-call field personnel, four additional PLT's, and control room personnel at the end of their workday. Hydro Ottawa has an established Electrical Emergency Response Plan and Organization. Formal training is completed annually according to Market Rules, and a weekly preparation meeting is held to refresh on-call management personnel. This event was considered to be a Major Event Day based on the IEEE Standard 1366 method. The daily SAIDI value of 12.11 on July 5th , 2019 exceeded the daily SAIDI threshold of 5.3, as determined by IEEE Standard 1366, based on the daily SAIDI values for the past five years. The total number of customer hours interrupted was 68,268. The outages were unrelated and restored independently of each other. The longest duration was the Limebank relay misoperation outage which lasted 6 hours, 35 minutes. No third party assistance was necessary. The on-call Management personnel conducted a debrief meeting to review the major outages, repairs made and corrective measures required. The Fallowfield derating has been corrected by Hydro One as their error.The Limebank T3 B protection settings have bee Hydro Ottawa Limited Hydro Ottawa Limited 2019 2019-12-17T00:00:00 2019-11-01T00:00:00 12:10 AM Winds were forecasted however the severity of the winds exceeded what was expected. Hydro Ottawa had a full complement of on-shift personnel, and a full on-call roster of field technicians and management personnel. Hydro Ottawa has an established Electrical Emergency Response Plan and Organization. Formal training is completed annually according to Market Rules, and a weekly preparation meeting is held to refresh on-call management personnel. This event was considered to be a Major Event Day based on the IEEE Standard 1366 method. The daily SAIDI value of 5.97 on November 1st , 2019 exceeded the daily SAIDI threshold of 5.3, as determined by IEEE Standard 1366, based on the daily SAIDI values for the past five years. The total number of customer hours interrupted was 33,805. The major damage from the wind started at 9am and 90% were restored at 3pm. One outside contractor was secured to assist with power restoration activities. No debrief of the event was held with stakeholders. There will be continued focus on on-call and emergency response preparation. Kingston Hydro Corporation Kingston Hydro Corporation 2019 2019-12-19T10:52:18 2019-11-01T00:00:00 01:41 a.m. Yes. No. Once restoration efforts began, we moved employees out of their regular positions into positions that would aid in the effort. Yes. Some training was position specific, such as crisis communications procedures, while other training is more general, such as relating to emergency management and the more formal incident management system (IMS). The calculated System Average Interruption Duration Index (SAIDI)/Day (mins) for the day exceeds the annual TMED threshold. The calculated annual TMED threshold using five year data (2014 to 2018) is 0.2808, while the calculated SAIDI for the day is 1.29. 48 hours. No. We debriefed with staff to find improvements and updated our crisis communications framework. London Hydro Inc. London Hydro Inc. 2019 2019-05-10T09:40:00 2019-03-13T00:00:00 08:12 AM No. There was no prior warning. London Hydro provides annual training to all supervisory staff that is involved in major event response on their roles and responsibilities. The last training session was held on November 29, 2018. This session included training on the roles and responsib Based on the IEEE Standard 1366 (2.5 Beta method) this event was considered to be a Major Event Day where the daily SAIDI and SAIFI values exceeded the daily SAIDI and SAIFI threshold values. The SAIDI and SAIFI threshold values were set based on the daily SAIDI and SAIFI values for the past 5 years. It took 63 minutes to restore over 90% of the customers who were interrupted. London Hydro did not require assistance through its third party mutual assistance agreement. London Hydro discussed the event with Hydro One and after determination of the root cause; Hydro One has been performing maintenance and also changed protection settings at the station to prevent future events of similar nature. London Hydro Inc. London Hydro Inc. 2019 2019-09-19T18:24:12 2019-07-20T00:00:00 08:02 PM Yes, Environment Canada issued high wind and thunderstorm warnings for Southwestern Ontario. London Hydro alerted the on call staff and contractor support. London Hydro provides annual training to all supervisory staff that are involved in major event response on their roles and responsibilities. The last training session was held on November 29, 2018. This session included training on the roles and responsi The weather events of July 20, 2019 were accordant with the definition of Major Event Day as per OEB's Electricity Reporting and Keeping Requirements, section 2.1.4.2. Severe thunderstorms, accompanied by high winds and lightning passed London Hydro's distribution area since July 19, 2019 through July 20 and July 21, 2019. Some of the Environment Canada alerts for July 20, 2019 include: - 19:17h "A line of strong to severe thunderstorms has formed over Michigan and is forecast to move southeastward across Southwestern Ontario this evening. Very strong wind gusts to 100 km/h will be possible with this line of storms, as well locally heavy rainfall accumulations. Intense lightning is likely with any thunderstorm that develops." - 23:40h "A line of strong to severe thunderstorms has moved into southwestern Ontario and is expected to race eastward this evening. Very strong wind gusts to 100 km/h will be possible with this line of storms, as well as locally heavy rainfall accumulations." Based on the IEEE Standard 1366 (2.5 Beta method) this event was considered to be a Major Event Day where the daily SAIDI values exceeded the daily SAIDI threshold value. The current SAIDI threshold is 0.09 and this MED (July 20, 2019) had a SAIDI of 0.22. The SAIDI threshold value was set based on the daily SAIDI values for the past 5 years. It took 5.6 hours to restore over 90% of the customers who were interrupted (13,096). London Hydro used an overhead contractor crew during the restoration work. London Hydro has an Emergency Procedures Plan; training and mockup is performed annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of extensive damage to London Hydro’s London Hydro Inc. London Hydro Inc. 2019 2019-09-19T18:35:05 2019-07-21T00:00:00 02:21 AM Yes, Environment Canada issued high wind and thunderstorm warnings for Southwestern Ontario. London Hydro alerted the on call staff and contractor support. London Hydro provides annual training to all supervisory staff that are involved in major event response on their roles and responsibilities. The last training session was held on November 29, 2018. This session included training on the roles and responsi The weather events of July 21, 2019 were accordant with the definition of Major Event Day as per OEB's Electricity Reporting and Keeping Requirements, section 2.1.4.2. Severe thunderstorms, accompanied by high winds and lightning passed London Hydro's distribution area since July 19, 2019 through July 20 and July 21, 2019. Some of the Environment Canada alerts for July 21, 2019 include: - July 20, 2019 @ 23:40h "A line of strong to severe thunderstorms has moved into southwestern Ontario and is expected to race eastward this evening. Very strong wind gusts to 100 km/h will be possible with this line of storms, as well as locally heavy rainfall accumulations." - July 21, 2019 @ 02:35h "Thunderstorms crossing the region may produce damaging winds, torrential downpours and frequent lightning this evening." Based on the IEEE Standard 1366 (2.5 Beta method) this event was considered to be a Major Event Day where the daily SAIDI values exceeded the daily SAIDI threshold value. The current SAIDI threshold is 0.09 and this MED (July 21, 2019) had a SAIDI of 0.12. The SAIDI threshold value was set based on the daily SAIDI values for the past 5 years. It took 5 hours to restore over 90% of the customers who were interrupted. London Hydro used an overhead contractor crew during the restoration work. London Hydro has an Emergency Procedures Plan; training and mockup is performed annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of extensive damage to London Hydro’s Milton Hydro Distribution Inc. Milton Hydro Distribution Inc. 2019 2019-04-09T13:44:05 2018-05-08T00:00:00 03:11 PM Yes. A high wind weather advisory was in effect prior to the Major Event Occurring. The Major Event began during working hours. All available staff were on duty. Yes Employees have received on the job training. The event was consistent with the OEB definition of "Major Event" . It was "beyond the control of the distributor as was: a) unforseeable b) unpredicable c) unpreventable or d) unavoidable It took 17.5 hours to restore 90% of the affected customers. No We have increased our Tree Trimming efforts in some of the affected areas. PUC Distribution Inc. PUC Distribution Inc. 2019 2019-02-15T00:00:00 2019-02-04T00:00:00 1:35 PM Yes - Environment Canada issued various statements leading up to the event. Yes - PUC made arrangements to have additional field and operations resources on standby. PUC has a standby schedule for management staff who are required to be available on a 24/7 basis. Yes - PUC has an established training program for Major Events. The weather event of February 4th was consistent with the OEB definition of "Major Event" (as set out in Section 2.1.4.2 of the OEB's Electrical Reporting and Record Keeping Requirements) as an event that "is beyond the control of the distributor and is unforeseeable; unpredictable; unpreventable; or unavoidable. Approximately 3.2 hours. No Outage review meetings were held to determine ways to restore power sooner. PUC Distribution Inc. PUC Distribution Inc. 2019 2019-02-20T00:00:00 2019-02-08T00:00:00 04:11 AM Yes - Environment Canada issued various statements leading up to the event. Yes - PUC made arrangements to have additional field and operation resources on standby. PUC has a standby schedule for management staff who are required to be available on 24/7 basis. Yes - PUC has an established training program for Major Events. the weather event of February 8th was consistent with the OEB definition of "Major Event" ( as set out in Section 2.1.4.2 of the OEB's Electrical Reporting and Record Keeping Requirements) as an event that "is beyond the control of the distributor and is unforeseeable; unpredictable; unpreventable; or unavoidable. Approximately 1.56 Hours No Outage review meetings were held to determine ways to restore power sooner. PUC Distribution Inc. PUC Distribution Inc. 2019 2019-09-25T16:57:55 2019-09-05T00:00:00 4:18 pm No No General training and drills associated with the IESO Emergency Preparedness Plans are executed throughout the year. The event of September 5th is consistent with the OEB definition of ?Major Event? (as set out in Section 2.1.4.2 of the OEB?s Electrical Reporting and Record Keeping Requirements) as an event that ?is beyond the control of the distributor and is unforeseeable; unpredictable and unpreventable; or avoidable Approximately 3.02 Hours No Outage review meetings was held PUC Distribution Inc. PUC Distribution Inc. 2019 2019-12-09T12:32:28 2019-03-15T00:00:00 12:07 AM No No General training and drills associated with the PUC/IESO Emergency Preparedness Plans are executed throughout the year. The event of March 15th is consistent with the OEB definition of ?Major Event? (as set out in Section 2.1.4.2 of the OEB?s Electrical Reporting and Record Keeping Requirements) as an event that ?is beyond the control of the distributor and is unforeseeable; unpredictable and unpreventable; or unavoidable. Approximately 1.7 Hours No Outage review meetings were held to determine if there are any opportunities for improvement. No opportunities to improve were identified. PUC Distribution Inc. PUC Distribution Inc. 2019 2019-12-20T13:23:03 2019-11-27T00:00:00 06:53 AM Yes, weather forecast indicated high winds and snow. Yes, we had prior warning and we had employees on standby. This major event occurred on November 27th in which we had a full complement of staff working. General training and drills associated with the IESO Emergency Preparedness Plans are executed throughout the year. The event of November 27th is consistent with the OEB definition of "Major Event" (as set out in Section 2.1.4.2 of the OEB's Electrical Reporting and Record Keeping Requirements) as an event that "is beyond the control of the distributor and is unforeseeable; unpredictable and unpreventable; or avoidable". Approximately 4 hours, although there were multiple times where the majority of customers were restored. Mutual assistance was not utilized during the outage. Outage review meetings are being held, and mock outages are part of an ongoing action plan to try and improve outage times and staff proficiency. Wasaga Distribution Inc. Wasaga Distribution Inc. 2019 2019-05-27T16:31:37 2019-05-16T00:00:00 08:11 AM No, the distributor did not have any prior warnings that the Major Event would occur. N/A Wasaga Distribution's (WDI) staff is experienced with the effects of a loss of supply event. Training included the attentive patrolling of both its system as well as the suppliers for potential dangerous situations. The Ontario Energy Board defined a Major Event as: a) Unforeseeable; b) Unpredictable; c) Unpreventable; or d) Unavoidable The outage was outside the control of the distributor and was both unavoidable and unpreventable and data produced triggered IEEE Standard 1366. It took 56 minutes to restore power to 90% of its customers. Wasaga Distribution did not receive assistance during this Major Event. Wasaga Distribution has: * Debriefed staff to discuss lessons learned * Confirmed the existing maintenance and capital programs that assisted minimizing the customers interrupted during the Major Event * Also the situation was discussed with Hydro One (su Wasaga Distribution Inc. Wasaga Distribution Inc. 2019 2019-11-14T10:40:01 2019-09-27T00:00:00 11:24 AM No the distributor did not have any prior warning that the Major Event would occur. N/A Wasaga Distribution Inc's. (WDI) staff is experienced with effects of a loss of supply event. Training included the attentive patrolling of both its system and as well as the suppliers for potential dangerous situations. The Ontario Energy Board has defined a Major Event as: "Major Event" is defined as an event that is beyond the control of the distributor and is: a) Unforeseeable b) Unpredictable c) Unpreventable, or d) Unavoidable The outage was outside the control of WDI and was both unavoidable and unpreventable. WDI consulted with Board Staff, Helen Guo, regarding this event and her response was as follows: "In general, outage caused by vehicle accident is not considered a Major Event because this type of incident normally occurs at a single location, does not cause exceptional/extensive damage to assets and can be restored in a short period of time. However, this specific event can be qualified as a Major Event because the 44kV feeder outage was a Loss of Supply event, and Loss of Supply event can be reported under Major Event category as long as the daily SAIDI passes the threshold. This Major Event can also include the 8kV circuit outage since it occurred during the same time period." It took ten (10) hours to restore power to more than 90% of its' customers who were interrupted. WDI did not receive assistance during the Major Event. WDI has debriefed staff and discussed lessons learned. Alectra Utilities Corporation Alectra Utilities Corporation 2018 2018-05-11T00:00:00 2018-03-12T00:00:00 03:53 AM No, a vehicular collision caused the event. The distributor did not have prior warning. Yes, Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its four rate zones including the Brampton rate zone. The Emergency Plan is based on the Incident Management System (?IMS?) and requires training exe Foreign Interference is an OEB cause category for Major Events. These types of events are outside of the control of Alectra Utilities. The SAIDI minute per day was 4.94 on March 12 which exceeded the threshold of 3.11 for the Brampton Rate Zone. 2.95 hours to restore 90% of the customers. Yes, private construction contractors were used. Alectra Utilities will review data to determine the likelihood of a similar event, if such an event is possible the pole may be relocated or the line placed underground. Additional remote switching will also be investigated to reduce the duration of poten Alectra Utilities Corporation Alectra Utilities Corporation 2018 2018-06-04T00:00:00 2018-04-04T00:00:00 09:21 AM There was a Wind Warning issued at 12:35PM on April 4, 2018 by Toronto Police Operations. Environment Canada indicated that strong westerly winds will push through the area in the afternoon with wind gusts of up to 90 km/h. The warning was issued at 12:35PM on April 4, 2018, so no additional employees were on duty or on standby prior to the Major Event beginning. Alectra Utilities? daily availability of staff in the Enersource Rate Zone is as follows: 1. On Call Line Supervisor 2. 2 Lines Managers and Operations Director available 3. 24/7 Trouble truck( 2 trucks on days and one at night) - 2 journeyman per truck 4. 24/7 Control Room 5. A Team ? on call team of 2 journeyman 6. B Team ? on call team of 2 journeyman 7. RBD Operator - journeyman 8. Substation person ? 1 substation electrician 9. On Call Control Room operator 10. Stores person ? one Storekeeper 11. Emergency call out list - approximately 70 lineman/ apprentices, 3 forestry and various Lines/Forestry contractors available Yes. Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its four rate zones including the Enersource Rate Zone covering the City of Mississauga. The Emergency Plan is based on the Incident Management Syste Gusts up to 91km/h were recorded at Pearson Airport. This not only impacted the Enersource Rate Zone, but neighbouring municipalities as well. This is outside of the control of Alectra Utilities as the event was not caused by any defects in its electrical system. The outages on April 4th, 2018 resulted in a SAIDI of 5.35, which exceeded the Major Event Day Threshold of 2.92. 90% of the customers were restored in 9 hours. No. Staff training is part of an ongoing process, per the Alectra Utilities Emergency Plan. New systems such as an Incident Management System have been rolled out as part of regular training. Alectra Utilities Corporation Alectra Utilities Corporation 2018 2018-06-14T00:00:00 2018-04-14T00:00:00 10:58 AM Environment Canada issued an ice storm warning at approximately 9:39am on April 13, 2018. Alectra Utilities did arrange to have extra employees on duty and on standby prior to the Major Event beginning. The staffing arrangements were as follows: Control Room: An additional 2 operators were scheduled for the April 14, 2018 Nightshift, for a total of 3 operators. Lines: All Lines staff employees were notified of the pending storm conditions and were on standby. Further, additional on call crews were assigned in both Hamilton and St. Catharines. Yes. Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its four rate zones including the Horizon Utilities Rate Zone covering the Cities of Hamilton and St. Catharines. The Emergency Plan is based on the Environment Canada issued wind warnings for the Hamilton / St. Catharines areas with frequent gusts near 90 km/h the night of April 14 continuing into the morning of April 15, with a few gusts of 100 km/h. There were also periods of freezing rain and ice pellets during the event. This not only affected the Horizon Rate Zone, but also neighbouring municipalities, as well. This is outside of the control of Alectra Utilities, as the event was not caused by any defects in its electrical system. The outages on April 14, 2018 resulted in a SAIDI of 9.35, which exceeded the Major Event Day Threshold of 8.19. 90% of the customers were restored in 6 hours. Yes, third parties were notified prior to the event and were required to assist in the restoration of power. Private electrical construction contractors and Tree contractors were utilized. Staff training is part of an ongoing process per the Alectra Utilities Emergency Plan. New systems such as an Incident Management System have been rolled out as part of regular training. Alectra Utilities Corporation Alectra Utilities Corporation 2018 2018-06-15T00:00:00 2018-04-15T00:00:00 2:55 PM Environment Canada issued an ice storm warning at approximately 9:39am on April 13, 2018. Alectra Utilities? daily availability of staff in the Enersource Rate Zone is as follows: 1. On Call Line Supervisor 2. 2 Lines Managers and Operations Director available 3. 24/7 Trouble truck( 2 trucks on days and one at night) - 2 journeyman per truck 4. 24/7 Control Room 5. A Team ? on call team of 2 journeyman 6. B Team ? on call team of 2 journeyman 7. RBD Operator - journeyman 8. Substation person ? 1 substation electrician 9. On Call Control Room operator 10. Stores person ? one Storekeeper 11. Emergency call out list - approximately 70 linemen/ apprentices, 3 forestry and various Lines/Forestry contractors available Yes. Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its four rate zones including the former Enersource rate zone covering the City of Mississauga. The Emergency Plan is based on the Incident Managemen Environment Canada issued wind warnings for the Mississauga area with frequent gusts near 90 km/h on the night of April 14, continuing into the morning of April 15, with a few gusts of 100 km/h. There were also periods of freezing rain and ice pellets during the event. This not only affected the Enersource Rate Zone, but also neighbouring municipalities. This is outside of the control of Alectra Utilities, as the event was not caused by any defects in its electrical system. The outages on April 15th, 2018 resulted in a SAIDI of 3.02, which exceeded the Major Event Day Threshold of 2.92. 90% of the customers were restored in 4 hours. No. Staff training is part of an ongoing process per the Alectra Utilities Emergency Plan. New systems such as an Incident Management System have been rolled out as part of regular training. Alectra Utilities Corporation Alectra Utilities Corporation 2018 2018-07-03T00:00:00 2018-05-04T00:00:00 2:12 PM Yes, Environment Canada issued a special weather statement at 13:00 hrs Eastern Standard Time for strong winds and gusts of 90-100km/h for the Hamilton and St. Catharines area. Alectra Utilities did arrange to have extra employees on duty and on standby, prior to the commencement of the Major Event. The staffing arrangements were as follows: Control Room: A total of five operators were scheduled for a regular dayshift. On nightshift, an additional three operators were called in and remained until 23:30hrs. Following the nightshift the standard complement of two operators were scheduled until the next scheduled day shift. ? Dayshift 7:30-19:30 = 5 operators ? Evening 19:30 ? 23:30 = 5 operators ? Night 23:30 ? 7:30 = 2 operators Lines: All lines staff employees were notified of the pending weather conditions and were asked to make themselves available, if required. There were two crews on standby in St. Catharines and three crews on standby in Hamilton. Yes. Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its four rate zones including the Horizon Utilities rate zone covering the Cities of Hamilton and St. Catharines. The Emergency Plan is based on the Environment Canada issued wind warnings for the Hamilton and St.Catharines area with frequent gusts near 90-100 km/h on May 4. The outages on May 4th, 2018 resulted in a SAIDI of 52.87, which exceeded the Major Event Day Threshold of 8.19. 90% of the customers were restored within 18 hours (May 4th 14:00 hrs- May 5th 08:00hrs) Yes, Alectra Utilities utilized assistance of private construction contractors, forestry contractors, and the third party IVR Company. Staff training is part of an ongoing process per the Alectra Utilities Emergency Plan. New systems such as an Incident Management System have been rolled out as part of regular training. Alectra Utilities Corporation Alectra Utilities Corporation 2018 2018-07-03T00:00:00 2018-05-04T00:00:00 2:56 PM Yes, Environment Canada issued a special weather statement at 13:00 hrs Eastern Standard Time for strong winds and gusts of 90-100km/h for the Vaughan and Barrie area. Alectra Utilities did arrange to have extra employees on duty and on standby, prior to the commencement of the Major Event. The staffing arrangements were as follows: Alectra Utilities arranged for eight additional staff members for the Control Room to deal with outage and other related events through the evening and overnight. Yes. Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its four rate zones including the PowerStream rate zone covering the Cities of Alliston, Aurora, Barrie, Beeton, Bradford West Gwillimbury, Markham, Environment Canada issued wind warnings for the Vaughan and Barrie area with frequent gusts near 90-100 km/h on May 4. The outages on May 4th, 2018 resulted in a SAIDI of 51.09, which exceeded the Major Event Day Threshold of 5.83. 90% of the customers were restored within 8 Hours. No. Staff training is part of an ongoing process per the Alectra Utilities Emergency Plan. New systems such as an Incident Management System have been rolled out as part of regular training. Alectra Utilities Corporation Alectra Utilities Corporation 2018 2018-07-03T10:02:46 2018-05-04T00:00:00 2:00 PM Yes, Environment Canada issued a special weather statement at 13:00 hrs Eastern Standard Time for strong winds and gusts of 90-100km/h for the Mississauga area. Alectra Utilities daily availability of staff in the Enersource Rate Zone is as follows: 1. On Call Line Supervisor 2. 2 Lines Managers and Operations Director available 3. 24/7 Trouble truck( 2 trucks on days and one at night) - 2 journeyman per truck 4. 24/7 Control Room 5. A Team ? on call team of 2 journeyman 6. B Team ? on call team of 2 journeyman 7. RBD Operator - journeyman 8. Substation person ? 1 substation electrician 9. On Call Control Room operator 10. Stores person ? one Storekeeper 11. Emergency call out list - approximately 70 lineman/ apprentices, 3 forestry and various Lines/Forestry contractors available Additional staff were notified of the potential Major Event. Yes. Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its four rate zones including the Enersource rate zone covering the City of Mississauga. The Emergency Plan is based on the Incident Management Syste Environment Canada issued wind warnings for the Mississauga area with frequent gusts near 90-100 km/h on May 4. The outages on May 4th, 2018 resulted in a SAIDI of 35.55, which exceeded the Major Event Day Threshold of 2.63. 90% of the customers were restored within 12 hours (May 4th 14:00 hrs- May 5th 02:00hrs) Yes, the third party IVR was utilized. Staff training is part of an ongoing process per the Alectra Utilities Emergency Plan. New systems such as an Incident Management System have been rolled out as part of regular training. Alectra Utilities Corporation Alectra Utilities Corporation 2018 2018-07-03T10:13:41 2018-05-04T00:00:00 3:37 PM Yes, Environment Canada issued a special weather statement at 13:00 hrs Eastern Standard Time for strong winds and gusts of 90-100km/h for the Brampton area. Yes, extra Operators were assigned due to the Major Event. Further, all line staff employees were advised to be on standby, additional crews were organized for on-call duty, and private construction contractors were also notified. In addition, extra staff members were made available to provide operational support. Yes. Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its four rate zones including the Brampton rate zone covering the City of Brampton. The Emergency Plan is based on the Incident Management System (?I Environment Canada issued wind warnings for the Brampton area with frequent gusts near 90-100 km/h on May 4. The outages on May 4th, 2018 resulted in a SAIDI of 3.59, which exceeded the Major Event Day Threshold of 3.11. 90% of the customers were restored within 5.92 hours (May 4th 15:37 hrs- May 4th 21:32 hrs) Yes, private construction contractors, forestry contractors, and the third party IVR were utilized. Staff training is part of an ongoing process per the Alectra Utilities Emergency Plan. New systems such as an Incident Management System have been rolled out as part of regular training. Alectra Utilities Corporation Guelph Hydro Electric Systems Inc. 2018 2018-06-12T00:00:00 2018-05-04T00:00:00 11:48 AM Yes, Guelph Hydro was aware of severe weather forecasts leading up to the Major Event. Environment Canada issued a wind warning shortly before 11:00 a.m. on May 4, 2018, indicating that wind gusts between 90 and 100 km/h were possible on this day in Guelph and surrounding areas. Environment Canada noted that damage to buildings and tree branches were possibilities given forecasted high winds. A severe thunderstorm watch was also issued by Environment Canada. Guelph Hydro did not have any extra employees on duty or stand-by other than its normal two-person on-call crew and on-call supervisor. Guelph Hydro did not have any extra employees on duty or standby for communications support; however, Guelph Hydro?s regular communications staff were ready to respond in the event of any power outages during or after normal business hours. The Guelph Hydro Control Room follows its emergency plan and has on-call supervisors who have the authority to declare an emergency and alert the operation crews. The Control Room provides training on its emergency plan once a year. Guelph Hydro?s Communi Using the IEEE 1366-2012 method, Guelph Hydro has established a major event day threshold (?Tmed?) of 6.473 Average Customer Minutes for 2018 events. The observed SAIDI of the major event day is 12.28 Average Customer Minutes (679,044 customer minutes)/(55,296 customers). The event involved loss of supply interruptions (which made up 86.21% of the customer minutes interrupted). The event was also related to a wind storm weather event which was outside of the control of Guelph Hydro. Guelph Hydro restored 90% of interrupted customers within 5 hours. With respect to outage communications, there was no assistance required through a third party mutual assistance agreement. Guelph Hydro?s distribution system in Rockwood has been upgraded with the completion of Rockwood MS1 reconstruction. This allows the majority of load in the village to be supplied by either Rockwood MS1 or Rockwood MS2 which are fed by different bulk supp Algoma Power Inc. Algoma Power Inc. 2018 2018-11-21T09:25:39 2018-09-21T00:00:00 00:27 AM Forecasts published earlier in the day predicted the possibility of rainfall and increased winds, though there was no prior warning of the eventual intensity of the storm and the number of fallen trees that would result. Not Applicable (N/A) API has a Business Continuity and Disaster Recovery Plan that is periodically updated and reviewed at the management level. This plan is designed to assist in the response to natural disasters, accidents, major outages, environmental disasters, municipal API considered this a Major Event due the unforeseen and uncontrollable nature of the storm?s intensity and the resulting substantial impact on API?s network and customer base. The magnitude of the level of destruction, number of interruptions and significant response required confirmed API?s perspective that this episode should be categorized as a Major Event. It took approximately 20 hours to restore 90% of the customers who were interrupted. API did not utilize assistance through a third party mutual assistance agreement. All restoration efforts were carried out by API staff. API conducted an event de-briefing meeting with contributors from all company departments, to review all facets of the Major Event, including the event itself, response and restoration efforts, resource allocation and technological assistance. Algoma Power Inc. Algoma Power Inc. 2018 2018-12-04T09:15:39 2018-10-04T00:00:00 00:54 AM The only warning regarding the potential that the Major Event would occur were weather forecasts that predicted strong winds, however the severity of the winds/wind gusts was greater than expected. Not Applicable (N/A) API has a Business Continuity and Disaster Recovery Plan that is periodically updated and reviewed at the management level. This plan is designed to assist in the response to natural disasters, accidents, major outages, environmental disasters, municipal API considered this a Major Event due the uncontrollable nature of the storm?s intensity and the resulting substantial impact on API?s network and customer base. The magnitude of the number of interruptions and significant response required confirmed API?s perspective that this episode should be categorized as a Major Event. It took approximately 15 hours to restore 90% of the customers who were interrupted. API did not utilize assistance through a third party mutual assistance agreement. All restoration efforts were carried out by API staff. API engaged representatives from all departments through a meeting to de-brief on all aspects of the Major Event ? including outage response, effective use of available resources and technological support. Bluewater Power Distribution Corporation Bluewater Power Distribution Corporation 2018 2018-07-03T15:07:36 2018-05-04T00:00:00 1:02 PM No. The outage occurred during working hours on May 4, 2018, as such BWP was fully staffed and at that point did not need extra employees. Bluewater has a comprehensive Emergency Response Plan that is continually being updated. In additon to the plan, a meeting is held annually with the emergency response team to review the emergency plan and any updates. The training process entails a revie The TMED for 2018 is 17.3867 based on the 2013-2017 period. This outage had a TMED of 58.0817 therefore was considered a Major Event. 4 No, assistance was not required. Bluewater was fully prepared for this outage, and handled it in accordance with the Emergency Plan without incident. Burlington Hydro Inc. Burlington Hydro Inc. 2018 2018-03-02T00:00:00 2017-10-15T00:00:00 14:18 PM Yes. There were weather advisories that were in place in advance of the storm that warned of high winds and intense storm cells due to a cold front moving across the province. Yes, Burlington Hydro arranged to have extra on call crew available and notified its third-party contractor to be on standby. Yes. Burlington Hydro works safely to restore power to the largest areas first and then works its way down to single outages. Fire, police and wires down take priority. Strong winds with gusts up to 90 km/hour affecting Burlington Hydro?s service area began at 2 pm and were the major cause of outages. 8,785 customers were affected representing approximately 13% of Burlington Hydro?s customers. 90% of the customers were restored by 20:29. Restoration took approximately 10.5 hours. Yes, Burlington Hydro used a third party contractor to support a pole replacement. Burlington Hydro is reviewing the hardware which supports its Outage Management System to mitigate technical issues in the future. This will ensure the public is notified in a timely manner on outages and ETRs. Burlington Hydro Inc. Burlington Hydro Inc. 2018 2018-03-02T17:46:28 2017-03-08T00:00:00 10:16 AM No N/a Yes. Burlington Hydro works safely to restore power to the largest areas first and then works its way down to single outages. Fire, police and wires down take priority. Strong winds affecting Burlington Hydro?s service area began at 10am and were the major cause of outages. 7,861 customers were affected representing approximately 12% of Burlington Hydro?s customers. 90% of the customers were restored by 16:32. Restoration took approximately 5 hours. No Burlington Hydro plans to add additional capacity on its server for its Outage Management System to prevent a failure during a major event. This will ensure the public is notified in a timely manner on outages and ETRs. Canadian Niagara Power Inc. Canadian Niagara Power Inc. 2018 2018-06-04T15:37:06 2018-04-04T00:00:00 06:00 AM On April 3, 2018, Environment Canada issued wind warnings for much of Southern Ontario, indicating that damaging winds were expected on April 4. The extreme winds were forecasted to begin in the early morning hours of April 4. CNPI had a normal complement on-call during the overnight hours from April 3-4, with the ability to call in additional crews if required. Additional crews were made available for outage response on April 4, with many crews working into the evening to complete restoration. CNPI has a Business Continuity and Disaster Recovery Plan that is periodically updated and reviewed at the management level. This plan is designed to assist in the response to natural disasters, accidents, major outages, environmental disasters, municipal CNPI considered this a Major Event due to the extreme and uncontrollable nature of the wind?s intensity and the resulting substantial impact on CNPI?s network and customer base. The gusting of the wind in this area exceeded the criteria specified in CNPI?s distribution design standards and CNPI could not have reasonably designed its system to avoid all outages in this situation. It took approximately 8 hours to restore 90% of the customers who were interrupted by this Major Event. CNPI did not utilize assistance through a third party mutual assistance agreement, however we did utilize a private utility-based contractor. CNPI conducted a round table discussion with contributors from the company operation departments, to review all facets of the Major Event, including the event itself, response and restoration efforts, resource allocation and technological assistance. Canadian Niagara Power Inc. Canadian Niagara Power Inc. 2018 2018-06-26T11:34:34 2017-10-15T00:00:00 04:00 AM The weather report indicated there would be some wind over the weekend, however there was no prior warning of the intensity of the wind gusts in the area. Not Applicable (n/a) CNPI has a Business Continuity and Disaster Recovery Plan that is periodically updated and reviewed at the management level. This plan is designed to assist in the response to natural disasters, accidents, major outages, environmental disasters, municipal CNPI considered this a Major Event due to the unforeseen and uncontrollable nature of the wind?s intensity and the resulting substantial impact on CNPI?s network and customer base. The gusting of the wind in this area was unforeseen and unpredictable and CNPI?s perspective that this episode should be categorized as a Major Event. It took approximately 4 hours to restore 90% of the customers who were interrupted by this Major Event. CNPI did not utilize assistance through a third party mutual assistance agreement, however we did utilize a private utility-based contractor. CNPI conducted a round table discussion with contributors from the company operation departments, to review all facets of the Major Event, including the event itself, response and restoration efforts, resource allocation and technological assistance. Elexicon Energy Inc. Veridian Connections Inc. 2018 2018-06-18T14:54:08 2018-04-15T00:00:00 21:40 Yes, Environment Canada issued a special weather statement on April 12th stating a potential ice storm for parts of southern Ontario for Saturday April 14th through to Sunday April 15th. Veridian enacted its Power Restoration Plan, which dictates the requirements for extra standby of employees. These included, but were not limited to: Customer Care Staff, Lines Staff, System Operators, Communications Personnel and Management. Veridian performs a tabletop exercise of its Power Restoration Plan in November of every year, where Veridian carries out roundtable discussions of how to tackle a hypothetical major event The weather event on April 16th was beyond the control of the utility which satisfies elements of being unpreventable or unavoidable. When assessed using the IEEE 1366 2.5 beta method and applied to five years of historic reliability data, the result exceeds the daily SAIDI threshold. Therefore April 16th was deemed as a major event day. 21 hours, 90% of customers were restored by April 16th, 19:10. No. Outside assistance was not required. Per the Veridian Power Restoration Plan, a debrief session takes place after each major event. This debrief session is used to analyze the response to the outage to determine the requirement for further training, process, policy and/or Power Restoration P Elexicon Energy Inc. Veridian Connections Inc. 2018 2018-07-05T12:26:28 2018-05-04T00:00:00 16:10 Yes, Environment Canada issued a special weather statement at 04:47 on May 4th noting potential winds later in the day. At 10:45 the same day, they issued a Wind Warning for all of Southern Ontario. Veridian enacted its Power Restoration Plan, which dictates the requirements for extra standby of employees. These included, but were not limited to: Customer Care Staff, Lines Staff, System Operators, Communications Personnel and Management. Veridian performs a tabletop exercise of its Power Restoration Plan in November of every year, where Veridian carries out roundtable discussions of how to tackle a hypothetical major event. The weather event on May 4th and 5th was beyond the control of the utility which satisfies elements of being unpreventable or unavoidable. When assessed using the IEEE 1366 2.5 beta method and applied to five years of historic reliability data, the result exceeds the daily SAIDI threshold. Therefore May 4th and May 5th were deemed as a Major Event. 29 hours, 90% of customers were restored by May 5th, 21:17. No. Outside mutual aid assistance was not required. Per the Veridian Power Restoration Plan, a debrief session takes place after each major event. This debrief session is used to analyze the response to the outage to determine the requirement for further training, process, policy and/or Power Restoration P Elexicon Energy Inc. Veridian Connections Inc. 2018 2018-11-02T00:00:00 2018-09-21T00:00:00 16:06 Yes, Environment Canada issued wind and severe thunderstorm warnings on September 21st for Gravenhurst, Belleville, Port Hope, Orono, Newcastle, Ajax, Pickering, Clarington and Brock. Veridian enacted its Power Restoration Plan, which dictates the requirements for extra standby of employees. These included, but were not limited to: Customer Care Staff, Lines Staff, System Operators, Communications Personnel and Management. Veridian performs a tabletop exercise of its Power Restoration Plan in November of every year, where Veridian carries out roundtable discussions of how to tackle a hypothetical major event. The weather event on September 21st was beyond the control of the utility which satisfies elements of being unpreventable or unavoidable. When assessed using the IEEE 1366 2.5 beta method and applied to five years of historic reliability data, the result exceeds the daily SAIDI threshold. Therefore September 21st was deemed as a Major Event Day. 10 hours, 90% of customers were restored by September 22nd 02:31. No. Outside mutual aid assistance was not required. Per the Veridian Power Restoration Plan, a debrief session takes place after each major event. This debrief session is used to analyze the response to the outage to determine the requirement for further training, process, policy and/or Power Restoration P Elexicon Energy Inc. Whitby Hydro Electric Corporation 2018 2018-02-23T13:54:55 2017-12-28T00:00:00 12:44 AM No. While Whitby was one of many areas in the province that was under an extreme cold weather alert, conditions were not expected to trigger a major event. No prior warning. Regular on call/standby operational resources were in place prior to the major event. This included line department employees (2) on call as well as a control room system operator (1) and stations employee (1) on standby. Operations supervisor/s are contacted for assistance if required. Whitby Hydro engages the services of a third party call centre who provides 24/7 outage assistance for customers and answers customer calls after-hours. Whitby Hydro operations (including line, control room and stations) employees are provided job-related training and are on-call or on standby as part of their regular employment. This ensures operations staff are available 24/7 and prepared to respond qui On December 28, the IEEE 1366 TMED threshold was exceeded. It was determined that an adverse weather related jolt of a pole occurred due to the extreme cold which caused conductor movement. There was no other plant damage found. Because of the weather-related equipment issues, Whitby Hydro?s system experienced a feeder lockout. Power was restored but intermittent outages continued while crews investigated until they were able to identify the main cause and isolate the equipment for repairs. The event was unexpected, unpredictable and unavoidable. The event initially caused an outage at 6:28pm on December 27, 2017 where more than 90% of affected customers were restored within 5 minutes. An additional five related outages occurred intermittently between 12:44am and 7:17am on December 28, 2017 and efforts were made to restore power to customers quickly and safely each time despite the extreme cold weather conditions and limitations from night time visibility until the issue was identified and fully addressed. While customers who experienced the outage had power periodically during that window of time, overall it took just over 5 hours to fully restore the power to more than 90% of customers affected by the outage. No. Additional assistance was not required. The following additional steps are being taken to ensure a state of readiness for major events: - Continue to review and update Whitby Hydro?s emergency protocols including coordination with the Town of Whitby for larger scale emergencies. Continue partic Elexicon Energy Inc. Whitby Hydro Electric Corporation 2018 2018-06-28T16:08:38 2018-05-04T00:00:00 17:25 PM High wind warnings were forecasted by Environment Canada prior to the event. Yes. Regular on call/standby operational resources that were in place included line department employees (2) on call as well as a control room system operator (1) and stations employee (1) on standby. In addition, arrangements were made with a number of regular staff, supervisors and managers to be available if needed and a third party contractor was also placed on call along with a forestry crew from the Town of Whitby who was on notice to assist if needed. Whitby Hydro engages the services of a third party call centre who provides 24/7 outage assistance for customers and answers customer calls after-hours. Whitby Hydro operations (including line, control room and stations) employees are provided job-related training and are on-call or on standby as part of their regular employment. This ensures operations staff are available 24/7 and prepared to respond qui For the event that spanned May 4-5, the IEEE 1366 TMED threshold was exceeded. During this timeframe Whitby Hydro experienced a loss of supply from Hydro One. High winds and gusts ranging up to 120 km/hour also contributed to the major event. The event was not preventable by Whitby Hydro. The event initially caused an outage at 5:25pm on May 4, 2018 due to adverse weather. At 5:49pm, a large number of customers were affected by the loss of supply from Hydro One. Over 70% of customers affected had their power restored in less than 2 hours and within 3.5 hours just under 90% of customers had power restored. No. The following additional steps are being taken to ensure a state of readiness for major events: - Continue to review and update Whitby Hydro?s emergency protocols including coordination with the Town of Whitby for larger scale emergencies. Continue partic Enova Power Corp. Kitchener-Wilmot Hydro Inc. 2018 2018-06-13T14:21:31 2018-04-15T00:00:00 3:50PM Several days prior to the storm, Environment Canada began issuing alerts warning of a ?potential major ice storm? for the upcoming weekend. Regular on-call operational resources were in place prior to the event. This included Distribution department employees (2 Powerline Technician?s and 1 Foreman), 24/7 Control Room and 1 Supervisory/Emergency Management person. Call Centre staff were notified prior to the event that the afterhours call centre could be activated KWHI Operations staff are provided job-related training and are on-call or on standby as part of their regular employment. This ensures that staff are available 24/7 and are prepared to respond quickly to address outages of varying magnitude. Applicable s The ice storm of April 15th meets the definition of a Major Event as defined by the Ontario Energy Board (OEB) in Section 2.1.4.2 of the OEB?s Electricity Reporting and Filing Requirements. That is, the event is ?beyond the control of the distributor and is unforeseeable; unpredictable; unpreventable; or unavoidable.? The impact to the distribution system as a result of the storm was unavoidable and unpredictable from a planning perspective. The accumulation of ice on trees and wires combined with wind gusts of up to 85 km/h were responsible for a number of fallen trees and broken limbs which took down power lines and caused widespread power outages Using the Institute of Electrical and Electronics Engineers (IEEE) Standard 1366, the KWHI calculated threshold for a major event (TMED) for 2018 is 5.36 minutes/customer. The impact of this event was 9.56 minutes/customer which exceeds the TMED. The only cause for the outages during that day was the adverse weather. The power was restored to over 90% of the customers in approximately 4 hours. Additional resources through our Mutual Assistance Plan or by Contractor were not required for this event. While KWHI?s response to the Major Event was successful there are areas of improvement that the organization continues to explore to be able to better respond to the next event. The following steps are being taken: ? Review backup power supply systems for Enova Power Corp. Kitchener-Wilmot Hydro Inc. 2018 2018-06-13T14:46:01 2018-05-04T00:00:00 2:53 PM Yes, Environment Canada issued a wind warning and severe thunderstorm watch the morning of May 4th. Regular on-call operational resources were in place prior to the event. This included Distribution department employees (2 Powerline Technician's and 1 Foreman), 24/7 Control Room and 1 Supervisory/Emergency Management person. The event occurred toward the end of regular office hours, so Kitchener-Wilmot Hydro Inc.'s (KWHI) call centre was already staffed and personnel stayed afterhours to maintain the call centre response through the event. KWHI Operations staff are provided job-related training and are on-call or on standby as part of their regular employment. This ensures that staff are available 24/7 and are prepared to respond quickly to address outages of varying magnitude. Applicable s The wind storm of May 4th meets the definition of a Major Event as defined by the Ontario Energy Board (OEB) in Section 2.1.4.2 of the OEB?s Electricity Reporting and Filing Requirements. That is, the event is beyond the control of the distributor and is unforeseeable; unpredictable; unpreventable; or unavoidable. The impact to the distribution system as a result of the storm was unavoidable. Wind speed increased from 57 km/h up to 122 km/h resulting in a number of fallen trees and broken limbs which took down power lines and caused widespread power outages. Using the Institute of Electrical and Electronics Engineers (IEEE) Standard 1366, the calculated KWHI threshold for a major event (TMED) for 2018 is 5.36 minutes/customer. The impact of this event was 33.16 minutes/customer which exceeds the TMED. The primary cause for the outages during the day was the adverse weather. Approximately 97% of outage time on May 4th was caused by adverse weather. The power was restored to 90% of the customers in approximately 7 hours. Additional resources through our Mutual Assistance Plan or by Contractor were not required for this event. This was the second Major Event in 2018 for KWHI and the company's response to the event was timely and successful. However, the organization continues to explore options to improve response to future Major Events. The following steps are being taken: - C Enova Power Corp. Kitchener-Wilmot Hydro Inc. 2018 2018-08-23T09:19:39 2018-06-24T00:00:00 12:35 AM No, the event was the result of a motor vehicle accident Not applicable KWHI Operations staff are provided job-related training and are on-call or on standby as part of their regular employment. This ensures that staff are available 24/7 and are prepared to respond quickly to address outages of varying magnitude. Applicable s The power outage event on June 24th meets the definition of a Major Event as defined by the Ontario Energy Board (OEB) in Section 2.1.4.2 of the OEB?s Electricity Reporting and Filing Requirements. That is, the event was ?beyond the control of the distributor and was unforeseeable; unpredictable; unpreventable; or unavoidable.? This event was the result of a motor vehicle accident involving a distribution pole with two, three-phase circuits on it. Power was interrupted to a large number of residential customers for almost eight hours. Using the Institute of Electrical and Electronics Engineers (IEEE) Standard 1366, the calculated KWHI threshold for a major event (TMED) for 2018 is 5.36 minutes/customer. The impact of this event was 16.91 minutes/customer which exceeds the TMED. Over 99% of the outage time on June 24th was due to the motor vehicle accident. It took 9.4 hours to restore 90% of the customers who were interrupted. Additional resources through our Mutual Assistance Plan or by Contractors were not required for this event. Following the event, KWHI met with its Operations staff to discuss how to make future accident sites safe in a timelier manner and allow first responders to get to victim(s) as soon as possible. Enova Power Corp. Waterloo North Hydro Inc. 2018 2018-05-09T16:48:12 2018-04-15T00:00:00 00:00 AM The Weather Network, Environment Canada and similar authorities had issued special weather statements and freezing rain warnings in advance of the major event. Waterloo North Hydro (WNH) normal after hours on call staff were readily available. This is comprised of: - One (1) Line Supervisor - Two (2) Powerline Maintainers (PLM?s) - One (1) Protection and Control Technician On Friday April 13, 2018, before the freezing rain storm began, WNH invoked emergency preparedness discussions. Arrangements were made to have these resources available: - Two (2) Corporate Communications Representatives - One extra (1) Line Supervisor on stand by - Four (4) extra PLM?s on stand by - Three extra System Operator?s available - Four (4) Damage Assessors (Engineering Technologists) - One (1) Engineering Supervisor - Four (4) Customer Service Representatives to handle phone calls - One (1) Customer Service Manager - One (1) Stores Manager including the availability of emergency storm inventory In addition, all PLM?s are on a call out list. Additional PLM staff were called out and utilized on April 15, 2018. WNH Operations employees are on call or on standby as part of their employment. Expectations to respond and work long days if required are known. Non-Operations staff were not utilized during this Major Event Day. Training was provided for Call Handling a This event has exceeded the IEEE 1366-2012 2.5? threshold for Major Event Days (TMED). WNH 2018 TMED = 0.0695 SAIDI/day. This MED = 0.1845 SAIDI/day Three hours. No. WNH realizes that ice storms are not avoidable. WNH continues to invest in capital rebuild and distribution automation. WNH owned infrastructure held up well in this ice and wind event. Just one WNH feeder was affected. WNH investment in distribution auto Enova Power Corp. Waterloo North Hydro Inc. 2018 2018-05-16T13:11:20 2018-05-04T00:00:00 00:00 AM The Weather Network, Environment Canada and similar authorities had issued special weather statements and wind warnings in advance of the major event. Waterloo North Hydro (WNH) normal after hours on call staff were readily available. This is comprised of: - One (1) Line Supervisor - Two (2) Power Line Maintainers (PLM?s) - One (1) Protection and Control Technician. On Friday May 4, 2018, before the wind storm began, WNH invoked emergency preparedness discussions. Arrangements were made to have these resources available: - Two (2) Corporate Communications Representatives - Power Line Maintainers to be available per Call Out List - One (1) extra System Operator for Day and Night shift for entire week end - One (1) Engineering Supervisor in case Damage Assessment was required - Six (6) Customer Service Representatives to handle phone calls - Two (2) Customer Service Managers rotating through Friday night and Saturday - One (1) Stores Representative including the availability of emergency storm inventory Note. All PLM's are on a call out list. Additional PLM staff and Line Supervisors were called out and utilized on May 4, May 5 and May 6, 2018, working up to 16 hour days. WNH Operations employees are on call or on standby as part of their employment. Expectations to respond and work long days if required are known. Training was provided for Call Handling and Outage Case management through the implementation and ongoing dev This event has exceeded the IEEE 1366-2012 2.5? threshold for Major Event Days (TMED). WNH 2018 TMED = 0.0695 SAIDI/day. This MED = 1.0213 SAIDI/day It took 7.5 hours to restore 90% of the affected customers. No. WNH realizes that severe weather is not avoidable. WNH continues to invest in capital rebuild and distribution automation. WNH owned infrastructure held up well in this severe weather event. WNH investment in distribution automation has offered a 9% savin Enova Power Corp. Waterloo North Hydro Inc. 2018 2018-07-27T00:00:00 2016-08-19T00:00:00 23:25 PM The Weather Network, Environment Canada and like authorities predicted lightning prior to the Major Event. No. This type of weather forecast, for lightning, even if severe, does not trigger the need for additional on-call staff. WNH Operations employees are on call or on stand by as part of their employment. Expectations to respond and work long days if required is known. Non Operations staff also on stand by were utilized for Call Intake and Damage Assessment and providing nouri August 19, 2016 is a major event as it exceeded the IEEE 1366 2.5? threshold. The event was unavoidable. However, the restoration effort did not take WNH out of its normal mode of operation as this was not a multiple day restoration. 1.5 hours. No. Continued awareness and continue advanced preparation of additional On Call resources. WNH continues to invest in Distribution Automation. This almost always extends a saving in interruption SAIDI. Enova Power Corp. Waterloo North Hydro Inc. 2018 2018-07-27T12:16:15 2016-07-25T00:00:00 2:45 AM The Weather Network, Environment Canada and like authorities predicted lightning prior to the Major Event. No. This type of weather forecast, for lightning, even if severe, does not trigger the need for additional on-call staff. WNH Operations employees are on call or on stand by as part of their employment. Expectations to respond and work long days if required is known. Non Operations staff also on stand by were utilized for Call Intake and Damage Assessment and providing nouri July 25, 2016 is a major event as it exceeded the IEEE 1366 2.5? threshold. The event was unavoidable. However, the restoration effort did not take WNH out of its normal mode of operation as this was not a multiple day restoration. 1.5 hours. No. Continued awareness and continue advanced preparation of additional On Call resources. WNH continues to invest in Distribution Automation. This almost always extends a saving in interruption SAIDI. Entegrus Powerlines Inc. Entegrus Powerlines Inc. 2018 2018-06-15T13:36:47 2018-04-14T00:00:00 10:45 AM The initial weather forecast from media outlets in the days leading up to the Major Event were somewhat conflicting, but generally indicated that a heavy rain storm was possible for the weekend of April 14-15, 2018. On Friday, April 13, at 6:50 am, Environment Canada issued a weather statement for Southwestern Ontario, indicating that several rounds of rain and occasional thunderstorms were likely for April 14-15. It was further indicated that temperatures might dip below the freezing mark late on April 14, with the threat of freezing rain. Subsequently, at 7:01 am on April 14, 2018, Environment Canada issued a rainfall warning for Chatham-Kent, indicating that the rain would change to freezing rain late in the afternoon. Entegrus serves 17 communities in Southwestern Ontario. The boundaries of the EPI service territory stretch from Wheatley in the southwest to Parkhill and St. Thomas in the northeast. The boundaries are non-contiguous, and the distance across the Entegrus service territory is approximately two hours travel time by vehicle. Accordingly, Entegrus operates three service centres, located in Chatham, Strathroy and St. Thomas. This structure enhances (through the availability of back up resources) response times to system needs during storms. Staff from all three operational centres were put on alert on the morning of Saturday, April 14 after the Environment Canada rainfall warning. Ultimately, staff from all three centres assisted with the restoration efforts later that day. In addition, Entegrus engaged in discussion on the morning of April 14 with neighbouring utilities regarding mutual assistance, although ultimately this was not required by Entegrus. Entegrus provides continuous training to staff on the various levels of response required for a Major Event. Entegrus has an established Emergency Preparedness Plan (?EPP?) providing details on how employees are called in and how staffing levels are balan The April 14, 2018 ice storm was considered a Major Event due to the number of customers experiencing a concurrent outage of greater than 15 minutes. Entegrus serves approximately 58,000 customers. At the peak of the Major Event in the afternoon of April 14, 2018, there were 12,597 customers without electricity, representing approximately 22% of Entegrus customers. It took 6.8 hours to restore power to 90% of the customers who were interrupted. No. Entegrus conducted a debriefing after the conclusion of the Major Event to review the successes and the areas of improvement. This will result in enhancements to continued staff training, including updates to the EPP to more fully describe requirements fo ENWIN Utilities Ltd. ENWIN Utilities Ltd. 2018 2018-09-12T12:32:40 2018-08-06T00:00:00 13:16 PM Yes, there was a severe weather warning. The weather warning did not provide much time before the storm hit. Crews were called but were not on site until after the Major Event began. Yes - we hold "mock storms" and annual storm training to refresh procedures with staff. This storm met criteria as per IEEE 1366. There were 15,313 customer hours of outage time experienced on this day. 1 hour and 2 minutes. No Communications staff have signed up for Environment Canada weather alerts by email. Festival Hydro Inc. Festival Hydro Inc. 2018 2018-06-08T10:24:11 2018-04-15T00:00:00 11:31 AM Yes. Festival was watching weather reports regarding a likely Ice Storm and received notifications via the local Emergency Response Group that adverse weather was expected. Yes. Festival Hydro notified available staff to be on standby as adverse weather was likely. Festival Hydro completes an annual review and round table discussion on its emergency preparedness plan and updates the plan on an annual basis. Freezing rain and wind storm with strong winds caused tree limbs and uprooted trees to fall on overhead power lines. Using the IEEE Standard 1366 method, the event exceeded the Major Event Day Threshold with 1,606,909 customer minutes. 27 hours and 22 minutes No Hydro One is preparing a feeder conversion to the supply in Dashwood that has improved historical reliability performance. Festival Hydro will continue to offer support to Hydro One in similar situations. Festival Hydro Inc. Festival Hydro Inc. 2018 2018-06-08T10:29:40 2018-04-24T00:00:00 5:34 AM No N/A Festival Hydro completes an annual review and round table discussion on its emergency preparedness plan and updates the plan on an annual basis. A fault was detected at Hydro One's Stratford TS that caused an outage on the transmission level affecting all customers in Stratford. Using the IEEE Standard 1366 method, the event exceeded the Major Event Day Threshold with 1,243,170 customer minutes. 1 hour and 51 minutes No Festival Hydro will continue to offer support to Hydro One in similar situations. Festival Hydro Inc. Festival Hydro Inc. 2018 2018-06-25T00:00:00 2018-05-04T00:00:00 2:43 pm Yes. Festival was watching local weather reports regarding high winds. The storm began during normal working hours and all available staff were on duty. Festival Hydro completes an annual review and round table discussion on its emergency preparedness plan and updates the plan on an annual basis. Strong winds caused tree limbs to fall on overhead power lines. Using the IEEE Standard 1366 method, the event exceeded the Major Event Day Threshold with 982,975 customer minutes. 4 hours and 41 minutes No Festival Hydro is reviewing technology solutions for outage communications. GrandBridge Energy Inc. Energy Plus Inc. 2018 2018-05-29T13:09:08 2018-04-15T00:00:00 2:40 AM ES Major Event Day: April 15, 2018 Severe Weather due to Freezing Rain Yes, the Weather Network, Environment Canada, and similar authorities had issued special weather statements and freezing rain warning in advance of the major event. Yes, in preparation for severe weather conditions causing multiple outages, on April 13, 2018, Energy+?s Emergency Plan Coordinator issued an email to senior leaders asking for confirmation of availability of staff and back up staff in advance of the major event. Energy+ ensured the following complement of staff and contractors were available: -On call crew and two back up crews consisting a total of eight (8) line-persons for Cambridge area -On call crew and two back up crews consisting a total of eight (8) line-persons for Brant area -Two (2) forestry contractor crews for Cambridge and Brant areas -Four (4) system control operators were on duty and present during the weekend -Two (2) senior management members were present during the weekend and five (5) other management staff members were on standby -Two (2) Communications Team members were on duty and working remotely throughout the weekend monitoring social media, liaising with local media, discussing status updates with system control operators -Fifteen (15) customer care representatives were on standby Energy+ has an emergency preparedness plan which specifies duties and responsibilities of team members. Energy+ did not need to invoke the plan as the magnitude of the outages did not meet the parameters defined in the plan to be quantified as an emergenc April 15, 2018 exceeded the IEEE 1366-2012 standard and the definitions within to determine if the specific day was deemed to be a major event day. Energy+ also performed a qualitative analysis based on OEB's questions to determine if the event can be considered a major event. Please refer to Major Event Report Attached - Section "During the Major Event" Question #1 for a computation of the calculated value. It took 10 hours and 42 minutes to restore power to 90% of customers impacted by the Major Event. Energy+ determined assistance through the third party mutual assistance agreement was not required. Energy+ holds a debrief meeting after each Major Event with key members involved to understand items that went well and things that could be improved in the future. Overall, Energy+ determined that the response during the Major Event on April 15, 2018 wen GrandBridge Energy Inc. Energy Plus Inc. 2018 2018-07-03T13:03:48 2018-05-04T00:00:00 13:25 The Weather Network, Environment Canada, and similar authorities had issued special weather statements and strong wind warning in advance of the major event. Environment Canada issued wind warnings across the province, with some areas getting lashed with gusts measuring up to 110 kilometers per hour. http://www.cbc.ca/news/canada/hamilton/hamilton-weather-may-4-1.4648017 There was no requirement to have extra employees on duty or standby as the event took place during regular business hours and, as a result, Energy+ had a full employee complement available. Energy+ has an emergency preparedness plan which specifies duties and responsibilities of team members. Energy+ did not need to invoke the plan as the magnitude of the outages did not meet the parameters defined in the plan to be quantified as an emergenc May 04, 2018 exceeded the IEEE 1366-2012 standard and the definitions within to determine if the specific day was deemed to be a major event day. Energy+ also performed a qualitative analysis based on the OEB's questions to determine if the event can be considered a major event. The IEEE 1366-2012 Standard provides a statistical method of studying reliability events. A Major Event Day is a day which the daily system SAIDI (System Average Interruption Duration Index) exceeds a threshold value, designated as T-med. The SAIDI index is used as the basis of this definition since it leads to consistent results regardless of the utility size, because SAIDI is a good indicator of operational and design stress. Data used for SAIDI is based on five (5) sequential years and includes days that had an interruption, so a SAIDI/Day value can be used to calculate T-med. Energy+ T-med value as calculated in accordance with the IEEE 1366-2012 standard is shown in Table 1.0 in attached PDF. The T-med value of 9.64 indicates that anything beyond this figure would be deemed to be a Major Event. Table 2.0 in attached PDF shows the Daily SAIDI values calculated for May 4th and May 5th respectively. The calculated value for May 04, 2018 is 48.38 and is greater than the T-med value calculated. Therefore, this specific day was deemed to be a Major Event. It took 10 hours and 58 minutes to restore power to 90% of customers impacted by the Major Event. Energy+ determined assistance through the third party mutual assistance agreement was not required. Energy+ utilized third party contractors to support restoration efforts. Energy+ holds a debrief meeting after each Major Event with key members involved to understand items that went well and things that could be improved in the future. Overall, Energy+ determined that the response during the Major Event on May 04, 2018 went Greater Sudbury Hydro Inc. Greater Sudbury Hydro Inc. 2018 2018-09-13T10:43:01 2018-07-09T00:00:00 16:56 PM A severe thunderstorm hit Sudbury on July 9th, 2018 at approximately 16:56. GSHI did not have any significant prior warning that the storm would be to the intensity level that was experienced. According to Environment Canada, the storm created a "downburst" which sometimes results from severe thunderstorms and produces straight-line wind, forcing the wind outward in all directions and results in incredible wind damage. Environment Canada issued a severe thunderstorm watch for Greater Sudbury at approximately 16:05 and upgraded it to a warning at 16:45, approximately 10 minutes before the storm hit. As Greater Sudbury did not have any warning prior to the end of the regular work day for operations crew, no extra employees were on duty or standby. However Greater Sudbury has a crew on-call 24/7 and has the ability to call in more crews if the need prevails. Staff had not been given formal training for response to a major event prior to the event. Plans are in the works to provide formal training in the coming months. The OEB defines a "Major Event" as an event that "is beyond the control of the distributor and is unforeseeable; unpredictable; unpreventable; or unavoidable". The adverse weather event experienced by the customers within GSHI's distribution territory was consistent with the OEB's definition of "Major Event". The storm knocked out power to nearly 8% of the customer base for a total of nearly 3.5 million customer minutes spread over the parts of four calendar days (July 9th thru July 12th, 2018). For comparison, GSHI's year-long Scorecard target for SAIDI (System Average Interruption Duration Index) is 1.18 - SAIDI for this adverse weather event alone was 1.23. It took 43.65 hours to restore 90% of the customers who were interrupted. In this instance GSHI received assistance from the following distributors: -PUC Distribution Inc. -Lakeland Power Distribution Ltd -North Bay Hydro Distribution Ltd GSHI also utilized assistance from the following private contractors: -Tommy Carruthers Se A debriefing meeting was held on August 1st, 2018 to discuss what went well, what could have gone better and what could be improved on in the future. As a result of the meeting, some procedures are being rewritten and GSHI's Emergency Situation Manual is Hydro One Networks Inc. Hydro One Networks Inc. 2018 2018-04-26T10:56:06 2017-01-10T00:00:00 09:35 PM On Monday, January 9th, at 8:03 am, a Transmission & Distribution “Significant Event Notification System” (SENS) was issued to advise of potential weather of heavy snow and strong winds, which could reach 70-80km/h for an afternoon period on January 10th. An update to the SENS was sent out on January 10th at 4:12pm, advising that strong winds with gusts of up to 90km/h were still expected. On Tuesday January 10th, arrangements were made to have extra employees in the Distribution Operations Management Centre (DOMC) on January 10th, 11th and 12th, for both day and night shifts. Yes, the response plan for a Major Event is reviewed once a year with the Distribution dispatchers. The work instruction for storm management is posted on the DOMC internal website for quick reference during storm events. In addition, a Storm Team visits Hydro One categorizes a Major Event as one that impacts 10 per cent or more of its customers. This event impacted approximately 195,000 (or about 14%) of Hydro One’s customers. At 12:09 pm on January 12th, the Muskoka M1 was restored, energizing 9,906 customers. This restoration was the 90% threshold, after 60 hours and 9 minutes from the onset of the event. Yes, Niagara Peninsula Energy assisted via our third party mutual assistance agreement. A pilot project (TWC Outage Prediction) will start in October. This web-based application will be used to forecast weather and predict potential impact on the distribution system. Hydro One has also implemented a banner on the external Outage Map to provi Hydro One Networks Inc. Hydro One Networks Inc. 2018 2018-04-26T13:40:23 2017-03-08T00:00:00 2:00 PM On March 7th at 1:43 pm, a Transmission & Distribution “Significant Event Notification System” (SENS) was issued to advise of high winds weather, starting on the morning of March 8th throughout the Province. On Tuesday, March 7th, extra employees were called into the Distribution Operations Management Centre (DOMC) to assist with the expected high winds. Extra employees were also called in to assist during the time period of the major event. Yes, the response plan for a Major Event is reviewed once a year with the Distribution dispatchers. The work instruction for storm management is posted on the DOMC internal website for quick reference during storm events. In addition, a Storm Team visits Hydro One categorizes a Major Event as one that impacts 10 per cent or more of its customers. This event impacted approximately 143,000 (or about 10.4%) of Hydro One’s customers. At 12:57 pm on March 9th, the Margach DS was restored, energizing 2,693 customers. This restoration was the 90% threshold, after 36 hours and 57 minutes from the onset of the event. No. A pilot project (TWC Outage Prediction) will start in October. This web-based application will be used to forecast weather and predict potential impact on the distribution system. Hydro One has also implemented a banner on the external Outage Map to provi Hydro One Networks Inc. Hydro One Networks Inc. 2018 2018-04-26T13:45:49 2017-04-07T00:00:00 1:18 AM Weather warnings were started on April 5th to advise the possible of strong winds and heavy wet snow across the majority of the Province. Extra staff was called in to assist, starting on Wednesday, April 6th, at the Distribution Operations Management Centre (DOMC) and continued to call in extra staff to assist during the major event. Yes, the response plan for a Major Event is reviewed once a year with the Distribution dispatchers. The work instruction for storm management is posted on the DOMC internal website for quick reference during storm events. In addition, a Storm Team visits Hydro One categorizes a Major Event as one that impacts 10 per cent or more of its customers. This event impacted approximately 156,000 (or about 11%) of Hydro One’s customers. At 4:48 pm on April 9th, the Coldwater DS was restored, energizing 1,191 customers. This restoration was the 90% threshold, after 64 hours and 48 minutes from the onset of the event. No. A pilot project (TWC Outage Prediction) will start in October. This web-based application will be used to forecast weather and predict potential impact on the distribution system. Hydro One has also implemented a banner on the external Outage Map to provi Hydro One Networks Inc. Hydro One Networks Inc. 2018 2018-04-26T13:52:15 2017-04-27T00:00:00 7:12 AM Weather warnings were started on April 25th to advise of possible strong winds, thunderstorms and freezing rain across the majority of the Province. No extra employees were called into the Distribution Operations Management Centre (DOMC) prior to this event. Hydro One’s Storm team (crews and support staff) was formed, in addition to the participation of the Company’s Provincial Lines and Distribution Operations Management Centre. This Storm team provided annual field training to prepare for Major Events. Hydro One categorizes a Major Event as one that impacts 10 per cent or more of its customers. This event impacted approximately 138,000 (or about 10%) of Hydro One’s customers. At 10:04 am on April 29th, the Clarabelle TS M7 was restored, energizing 6,963 customers. This restoration was the 90% threshold, after 58 hours and 4 minutes from the onset of the event. No. A pilot project (TWC Outage Prediction) will start in October. This web-based application will be used to forecast weather and predict potential impact on the distribution system. Hydro one has also implemented a banner on the external Outage Map to provi Hydro One Networks Inc. Hydro One Networks Inc. 2018 2018-04-26T13:58:29 2017-05-18T00:00:00 9:00 PM On May 18th at approximately 3:45 pm, Environment Canada issued severe thunderstorm watches with high winds for majority of Southern Ontario. A Transmission & Distribution Significant Event Notification System (SENS) was sent out at 3:59 pm on May 18th, advising of potential high winds throughout south-central Ontario. Yes, on May 18th extra staff was added in the Distribution Operations Management Centre (DOMC) during the period of the major event. Yes, the response plan for a Major Event is reviewed once a year with the Distribution dispatchers. The work instruction for storm management is posted on the DOMC internal website for quick reference during storm events. In addition, a Storm Team visits Hydro One categorizes a Major Event as one that impacts 10 per cent or more of its customers. This event impacted approximately 142,000 (or about 10.3%) of Hydro One’s customers. At 10:11 pm on May 19th, the Baysville DS F1 was restored, energizing 857 customers. This restoration was the 90% threshold, after 46 hours and 11 minutes from the onset of the event. No. A pilot project (TWC Outage Prediction) will start in October. This web-based application will be used to forecast weather and predict potential impact on the distribution system. Hydro one has also implemented a banner on the external Outage Map to provi Hydro One Networks Inc. Hydro One Networks Inc. 2018 2018-04-26T15:14:02 2017-10-15T00:00:00 2:38 PM On October 14th, 2017, warnings were issued with regarding to a cold front approaching, which would bring potential thunderstorms and high winds. At 2:21 pm, a Transmission & Distribution Significant Event Notification System (SENS) was issued, advising of potential thunderstorms and high winds across South/Central Ontario. Yes. Field staff was kept apprised of the approaching high wind event. Field crews were placed on alert, and canvassing of crew availability was also completed. Additional Dispatcher staff was also called into the Distribution Operations Management Centre (DOMC). Yes, the response plan for a Major Event is reviewed once a year with the Distribution dispatchers. The work instruction for storm management is posted on the DOMC internal website for quick reference during storm events. In addition, a Storm Team visits Hydro One categorizes a Major Event as one that impacts 10 per cent or more of its customers. This event impacted approximately 141,500 (or about 10.2%) of Hydro One’s customers. At 11:40 am on Oct 16th, recloser 1901 on the Flynns Corners DS F3 was restored, energizing 410 customers. This restoration was the 90% threshold, after 35 hours and 40 minutes from the onset of the event. No. A pilot project (TWC Outage Prediction) started in October. This web-based application will be used to forecast weather and predict potential impact on the distribution system. Hydro one has also implemented a banner on the external Outage Map to provide Hydro One Networks Inc. Hydro One Networks Inc. 2018 2018-08-21T13:29:29 2018-04-04T00:00:00 10:43 AM Yes, prior warning was given by the weather provider of possible Thunder Storms with heavy rain 20?30 mm and wind gusts to 70-80 km/h in the Southwestern Ontario and the Niagara areas. A Significant Event Notification System (SENS) was subsequently sent out by the Distribution Operations Management Centre (DOMC) on Tuesday April 3rd, advising of a pending significant weather. DOMC developed a Storm Restoration Contingency Staffing plan on Wednesday April 4th and Thursday April 5th. Additional staff was added to assist for all shifts. Yes, the response plan for a Major Event is reviewed once a year with the Distribution dispatchers. The work instruction for storm management is posted on the DOMC internal website for quick reference during storm events. In addition, a Storm Team visits Hydro One categorizes a Major Event as one that impacts 10 per cent or more of its customers. This event impacted approximately 236,000 customers, or about 17 per cent. At 12:46 PM on April 5th, the Greely DS F3 feeder was restored, energizing 436 customers. This restoration was the 90% threshold, after 36 hours and 46 minutes from the onset of the event. No. A pilot project (TWC Outage Prediction) had begun in October 2017. This web-based application was used to forecast weather and predict potential impact on the distribution system. Hydro One has also implemented a banner on the external Outage Map to provi Hydro One Networks Inc. Hydro One Networks Inc. 2018 2018-08-21T13:36:57 2018-04-14T00:00:00 01:39 PM Yes, a Significant Event Notification System (SENS) was sent out by the Distribution Operations Management Centre (DOMC) on Friday April 13rd, indicating a potential significant freezing rain. Yes, DOMC had arranged to have extra dispatchers as well as managers on shift for the duration of the storm, from April 14th to April 18th, to assist with the restoration efforts. All Distribution line workers attended and completed the annual ?Mock Storm Emergency Response? training. The procedure of the training was implemented and posted at the Distribution Forward Command Centre. Hydro One categorizes a Major Event as one that impacts 10 per cent or more of its customers. This event impacted approximately 467,000 customers (or about 34%) of Hydro One?s customers. At 8:37 AM on April 17th, a line switch on the Ingersoll TS M50 feeder was restored, energizing 214 customers. This restoration was the 90% threshold, after 80 hours and 37 minutes from the onset of the event. Yes, 5 LDCs assisted in this restoration effort. A pilot project (TWC Outage Prediction) had begun in October 2017. This web-based application was used to forecast weather and predict potential impact on the distribution system. Hydro One has also implemented a banner on the external Outage Map to provi Hydro One Networks Inc. Hydro One Networks Inc. 2018 2018-08-30T13:03:39 2018-05-04T00:00:00 2:30 AM Yes, prior warning was issued by weather provider of possible strong thunderstorms in Southern, Central and Eastern Ontario with widespread gusts of 80 – 90kph and marginal conditions of tornado activity especially along the Georgian Bay. Additional staff was scheduled by Distribution Operations Management Centre (DOMC) in preparation of the potential high incident event. Yes, specific response plan for a Major Event is reviewed once a year with the Distribution dispatchers. The work instruction for storm management is posted on the DOMC internal website for quick reference during storm events. In addition, a Storm Team vi Hydro One categorizes a Major Event as one that impacts 10 per cent or more of its customers. This event impacted approximately 620,000 customers or about 45 per cent of Hydro One’s total customer base. At 8:25 PM on May 7th, 558,509 customers had been restored, which represented the 90% threshold, after 76 hours and 10 minutes from the onset of the event. Yes, there were Twenty LCD’s assisted via third party mutual assistance agreement. TWC Outage Prediction pilot program that was initiated in October 2017 has tested successful. Hydro One has decided to purchase this tool and is now customizing features to enhance our demographic. This web-based application provides ability to forecast w Hydro One Networks Inc. Hydro One Networks Inc. 2018 2018-10-24T13:21:59 2018-06-30T00:00:00 08:49 AM Yes, prior warning was issued by weather provider of possible strong thunderstorms in Southern, Central and Eastern Ontario with widespread gusts of 80 to 90 kph and marginal conditions of tornado activity especially along the Georgian Bay. Additional staff was scheduled by Distribution Operations Management Centre (DOMC) in preparation for this potential "High Incident"event. Yes, specific response plan for a Major Event is reviewed once a year with the Distribution dispatchers. The work instruction for storm management is posted on the DOMC internal website for quick reference during storm events. In addition, a Storm Team vi Hydro One categorizes a Major Event as one that impacts 10 per cent or more of its customers. This event impacted approximately 163,000 customers, or about 12 per cent. At 6:46PM on July 2nd, after 66 hours and 46 minutes from the onset of the event, the recloser M1RC1 on the Chesterville TS M1 feeder was restored, energizing 4,031 customers, bringing a total number of customers restored up to approximate 147,000, which represented the 90% threshold. Yes, there were seven LCD's and one contractor who assisted via third party mutual assistance agreement. TWC Outage Prediction pilot program that was initiated in October 2017 has tested successful. Hydro One has decided to purchase this tool and is now customizing features to enhance our demographic. This web-based application provides ability to forecast w Hydro One Networks Inc. Hydro One Networks Inc. 2018 2018-11-26T09:09:57 2018-09-21T00:00:00 01:04 PM Yes, prior warning was issued by weather provider of possible strong thunderstorms in the Southern, Central and Eastern Ontario with widespread gusts of 80 ? 90kph and marginal conditions of tornado activity especially along the Georgian Bay. Additional staff was scheduled by Distribution Operations Management Centre (DOMC) in preparation for this potential ?High Incident? event. Yes, specific response plan for a Major Event is reviewed once a year with the Distribution dispatchers. The work instruction for storm management is posted on the DOMC internal website for quick reference during storm events. In addition, a Storm Team vi Hydro One categorizes a Major Event as one that impacts 10 per cent or more of its customers. This event impacted approximately 507,000 customers, or about 37 percent. At 12:25PM on September 25th, after 108 hours and 25 minutes from the onset of the event, the feeder recloser on the Tillsonburg TS M2 feeder was restored, energizing 1,918 customers, bringing a total number of customers restored up to approximately 456,650, which represented the 90% threshold. Yes, there were thirteen LCD?s and three contractors who assisted via third party mutual assistance agreement. TWC Outage Prediction pilot program that was initiated in October 2017 has tested successful. Hydro One has decided to purchase this tool and is now customizing features to enhance our demographic. This web-based application provides ability to forecast w Hydro One Networks Inc. Hydro One Networks Inc. - 1937680 Ontario Inc. (Peterborough Distribution) 2018 2018-06-08T00:00:00 2018-05-04T00:00:00 03:00 PM Yes. There were weather advisories that were in place in advance of the storm that warned of high winds and intense storm cells due to a cold front moving across the province. However, the potential impact of the storm was difficult to quantify when compared to a hurricane, tornado, or major ice storm. No extra employees were called on standby ahead of the storm. There was no clear indication that this storm would cause as much significant damage as it did. We perform periodic test scenarios for major outages in our control centre to enhance our state of readiness. This event was considered a Major Event since it was caused by an intense windstorm with gusts over 100 km/h. The trees that were brought down onto our lines during this event caused extensive damage to our assets, took significantly longer than usual to repair, and affected a substantial number of customers. 90% of our customers were restored within three hours of the first major event No PDI has implemented a fault location, isolation, and restoration on our 27.6 kV distribution system. This system triggered an automatic switching order, which was stopped due to an abnormal system configuration prior to the event. Hydro Ottawa Limited Hydro Ottawa Limited 2018 2018-06-06T00:00:00 2018-04-15T00:00:00 05:08 PM Weather forecasts initially indicated that the storm would hit sometime over the weekend, possibly as early as Friday April 13th. The forecast was for a period of significant feezing rain and gusty winds followed by a warm front. We expected that the warming would prevent the ice from building up. The storm system stalled over southern Ontario for the weekend before finally moving into the Ottawa area Sunday evening. Hydro Ottawa had a full complement of on-shift personnel, and a full on-call roster of field technicians and management personnel. All Operations groups were briefed before the weekend about the approaching weather. Hydro Ottawa has an established Electrical Emergency Response Plan and Organization. Formal training is completed annually according to Market Rules, and a weekly preparation meeting is held to refresh on-call management personnel. This event was considered to be a Major Event Day based on the IEEE Standard 1366 method. The SAIDI value of April 16, 2018 exceeded the daily SAIDI threshold, as determined by IEEE Standard 1366, based on the daily SAIDI values for the past five years. It took approximately 36 hours from the activation of our Electrical Emergency Response Plan to restore 90% of affected customers. No, not according to any formal Mutual Assistance Agreement. We did, however, use third-party contractors for forestry and lines work. A debrief of the event was held with all stakeholders. There will be continued focus on on-call and emergency response preparation, and outage communication. Hydro Ottawa Limited Hydro Ottawa Limited 2018 2018-06-26T15:34:06 2018-05-04T00:00:00 07:24 PM Weather forecasts indicated that active weather was probable for the evening of May 4th. Wind gusts exceeding 90kmph were forecast. System Operations personnel reviewed weather radar from several sources late in the afternoon, and at that time the weather system appeared to be tracking south of the Ottawa area. Hydro Ottawa had a full complement of on-shift personnel, and a full on-call roster of field technicians and management personnel. All Operations groups were notified early in the day of the approaching weather. Hydro Ottawa has an established Electrical Emergency Response Plan and Organization. Formal training is completed annually according to Market Rules, and a weekly preparation meeting is held to refresh on-call management personnel. This event was considered to be a Major Event Day based on the IEEE Standard 1366 method. The SAIDI value of May 4, 2018 exceeded the daily SAIDI threshold, as determined by IEEE Standard 1366, based on the daily SAIDI values for the past five years. It took approximately 12 hours from the activation of our Electrical Emergency Response Plan to restore 90% of affected customers. No, not according to any formal Mutual Assistance Agreement. We did, however, use third-party contractors for forestry and lines work. Hydro Ottawa personnel were requested to assist Hydro One in the Ottawa area for the day on Monday May 7, 2018. A debrief of the event was held with all stakeholders. There will be continued focus on on-call and emergency response preparation. London Hydro Inc. London Hydro Inc. 2018 2018-06-12T13:09:01 2018-04-15T00:00:00 02:09 PM Yes, Environment Canada issued a freezing rain and high wind warning for southwestern Ontario London Hydro had employees available on standby to assist during the event. London Hydro also contacted several private contract resources (overhead linemen and arborists) and requested that they be available if needed. London Hydro provides annual training to all supervisory staff involved in major event response on their roles and responsibilities. The last training session was held on December 5th, 2017. This session included training on the roles and responsibilities Based on the IEEE Standard 1366 (2.5 Beta method) this event was considered to be a Major Event Day where the daily SAIDI and SAIFI values exceeded the daily SAIDI and SAIFI threshold values. The SAIDI and SAIFI threshold values were set based on the daily SAIDI and SAIFI values for the past 5 years. It took 17 hours to restore more than 90% of the customers who were interrupted since 12:00am on April 15th. However, the most significant outage occurred at 2:09pm and contributed 97% of customer interruptions on April 15th. These customers were restored in just over 3 hours. London Hydro did not require assistance through its third party mutual assistance agreement; however, London Hydro did use third party contractors through the private contractor?s agreement. London Hydro has an Emergency Procedures Plan; training and mockup is performed annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of extensive damage to London Hydro?s London Hydro Inc. London Hydro Inc. 2018 2018-06-27T14:12:44 2018-05-04T00:00:00 04:20 PM Yes, Environment Canada issued a high wind warning for southwestern Ontario. The Major Event happened during normal working hours. London Hydro had all employees available to assist during the event. London Hydro provides annual training to all supervisory staff that are involved in major event response on their roles and responsibilities. The last training session was held on December 5th, 2017. This session included training on the roles and respons Based on the IEEE Standard 1366 (2.5 Beta method) this event was considered to be a Major Event Day where the daily SAIDI and SAIFI values exceeded the daily SAIDI and SAIFI threshold values. The SAIDI and SAIFI threshold values were set based on the daily SAIDI and SAIFI values for the past 5 years. It took 20 hours to restore more than 90% of the customers who were interrupted since 12:00am on May 4th. However, the Major Event outage occurred at 4:20pm and contributed 51% of customer interruptions on May 4th. These customers were restored in just over 4 hours. London Hydro did not require assistance through its third party mutual assistance agreement; however, London Hydro did use third party contractors through the private contractor's agreement. London Hydro has an Emergency Procedures Plan; training and mockups are performed annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of extensive damage to London Hydro London Hydro Inc. London Hydro Inc. 2018 2018-09-05T17:00:16 2018-07-05T00:00:00 2:23 PM Yes, Environment Canada issued a severe weather warning for southwestern Ontario. The Major Event happened during normal working hours. London Hydro had all employees available to assist during the event. London Hydro provides annual training to all supervisory staff that are involved in major event response on their roles and responsibilities. The last training session was held on December 5th, 2017. This session included training on the roles and respons Based on the IEEE Standard 1366 (2.5 Beta method) this event was considered to be a Major Event Day where the daily SAIDI and SAIFI values exceeded the daily SAIDI and SAIFI threshold values. The SAIDI and SAIFI threshold values were set based on the daily SAIDI and SAIFI values for the past 5 years. It took 2 hours and 23 minutes to restore 90% of the customers who were interrupted. The remaining 10% of customers interrupted were restored in 3 hours and 17 minutes. London Hydro did not require assistance through its third party mutual assistance agreement. London Hydro has an Emergency Procedures Plan; training and mockup is performed annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of extensive damage to London Hydro?s Newmarket-Tay Power Distribution Ltd. Newmarket-Tay Power Distribution Ltd. 2018 2018-05-28T14:41:16 2018-05-04T00:00:00 17:07 PM No. Not applicable. Major event procedures are available and reviewed annually. The event was considered a Major Event in accordance with OEB RRR definition i.e. unpredictable and beyond the control of the distributor and using fixed approach methodology i.e. criteria for 10% of total customers affected. Hydro was restored to 90% of the customers within 1 to 1.5 hours. No. Mutual Assistance from a third party was not required. Already commenced discussion with Hydro One as to cause and action for future mitigation. Oakville Hydro Electricity Distribution Inc. Oakville Hydro Electricity Distribution Inc. 2018 2018-06-28T09:18:46 2018-05-04T00:00:00 3:52 p.m A powerful windstorm struck Southern and Central Ontario on May 4, 2018, knocking down trees and downing power lines. Early in the day, Environment Canada had issued a special weather statement for Oakville and surrounding areas warning that wind gusts of 70 to 80 km/h were likely across much of the region that afternoon and that there may be a few local power outages. Later that morning, Environment Canada upgraded the wind warning and advised that winds of 90 to 100 km/h could cause damage to buildings, such as to roof shingles and windows, and that high winds might toss loose objects or cause tree branches to break. The windstorm proved to be even more severe than expected with Environment Canada measuring wind gusts of 109 km/h at the Burlington monitoring station at the height of the storm. It is Oakville Hydro?s practice to have a crew of two on stand-by at all times. The first power outage occurred at 3:52 p.m. on May 4, 2018 and by 4:00 p.m., Oakville Hydro called in all available staff to assist with. By 6:00 p.m., Oakville Hydro had also engaged a third party power line contractor under to assist with power restoration and the Town of Oakville to assist with the clearing of trees and branches. Oakville Hydro?s Business Continuity Plan requires a regular review of Enterprise Critical Functions (ECF) in each department. Potential interruptions (storms, pandemics, access to facilities etc.) to these ECF?s are identified and mitigation plans develo The Ontario Energy Board?s (OEB?s) Electricity Reporting and Record Keeping Requirements (RRR) define a major event as follows: An event that is beyond the control of the distributor and is: a) unforeseeable; b) unpredictable; c) unpreventable; or d) unavoidable. The Electricity RRRs further define a major event as an event that disrupts normal business operations and occurs so infrequently that it would be uneconomical to take them into account when designing and operating the distribution system. Such events cause exceptional and/or extensive damage to assets, they take significantly longer than usual to repair, and they affect a substantial number of customers. Weather events such as this, which uprooted trees and resulted in the closure of the Burlington Skyway, are not common. In Oakville Hydro?s opinion, it would not only be uneconomical but close to impossible to plan for winds over 100 km/h, which can uproot large trees, when designing and operating the distribution system Oakville Hydro was able to restore power to more than 90% of the effected customers within three hours of the first interruption. By 6:50 p.m., less than 2,000 customers were without power and by 8:41 p.m., the number of interruptions had been reduced to 532 and by 2:23 p.m. on May 5, 2018, there were less than 100 customers without power. During this event, Oakville Hydro did not seek assistance from its LDC mutual aid partners, however it was able to receive assistance on May 4, 2018 through an Alliance Agreement in place with a large power line contracting firm. The agreement allows for Oakville Hydro conducted a full de-brief of the major event and its response capability. Through this process, Oakville Hydro identified some opportunities to enhance its overall capabilities. Oakville Hydro will continue to improve upon its Business Cont Oakville Hydro Electricity Distribution Inc. Oakville Hydro Electricity Distribution Inc. 2018 2018-06-28T14:05:34 2017-04-25T00:00:00 8:51 p.m. On April 25, 2017, the T37B circuit tripped due to animal contact with T4 Transformer at Hydro One?s Palermo Transformer Station. Due to the nature of the incident (animal contact), Oakville Hydro did not have any prior warning the major event would occur. Oakville Hydro operates its control center 24 hour per day, seven days per week. It is also Oakville Hydro?s practice to have a crew of two on stand-by at all times Oakville Hydro?s Business Continuity Plan requires a regular review of Enterprise Critical Functions (ECF) in each department. Potential interruptions (storms, pandemics, access to facilities etc.) to these ECF?s are identified and mitigation plans develo The Ontario Energy Board?s (OEB?s) Electricity Reporting and Record Keeping Requirements (RRR) define a major event as follows: An event that is beyond the control of the distributor and is: a) unforeseeable; b) unpredictable; c) unpreventable; or d) unavoidable. The Electricity RRRs further define a major event as an event that disrupts normal business operations and occurs so infrequently that it would be uneconomical to take them into account when designing and operating the distribution system. Such events cause exceptional and/or extensive damage to assets, they take significantly longer than usual to repair, and they affect a substantial number of customers. Animal contact events such as this are unpredictable and unpreventable. Oakville Hydro was able to restore power all customers within one hour of the first interruption through remote switching. During this event, Oakville Hydro did not seek assistance from its LDC mutual aid partners as it was able to restore power to its customers through remote switching from its control centre. Oakville continues to evolve its distribution system through prudent asset management decisions based on replacing selected end-of-life equipment and communication infrastructure, with choices that align with its evolving grid modernization goals. Oshawa PUC Networks Inc. Oshawa PUC Networks Inc. 2018 2018-06-22T09:49:34 2018-05-04T00:00:00 05:33 PM Yes, the weather network issued high wind warnings. Yes, Manager of Metering and Operations issued an Emergency Preparedness SMS to management team at 3:00 pm. Lines distribution asked for extra crews to be available for standby. Verify standby generator available. Oshawa PUC Networks reviewed the Emergency Preparedness Plan on April 13th, 2018 and ran through a scenario regarding a large outage event similar to the ice storm in 2013. This event has been considered as a Major Event as this was outside of our control and exceeds the reasonable design and operational limits of the electric power system due to the abnormal high winds / microburst that caused 13 poles to snap and break resulting in the loss of our 2 ? 44KV feeders. Multiple high winds also caused trees to be uprooted and limbs to crash, debris in the air cause 2 additional 44 KV feeders to be removed from service. Total customers out of power is 20580. This event has also impacted other utilities in the area. 3.33 hours No, it was determined that assistance was not required. Continuous system upgrades and storm hardening through engineering design and construction using current standards. PUC Distribution Inc. PUC Distribution Inc. 2018 2018-10-11T10:06:19 2018-09-21T00:00:00 6:55 AM Yes - Environment Canada issued various statements leading up to the event. Yes - PUC Distribution made arrangements to have additional field and operation resources on standby. PUC Distribution also has a standby schedule for management staff who are required to be available on a round the clock basis. Yes - PUC Distribution has an established training program for Major Events. PUC has a comprehensive Preparedness and Restoration Plan that is continually being updated. In addition to the plan, a meeting is held annually with the emergency response team The weather event on September 21 was consistent with the OEB definition of a "Major Event" (as set out in Section 2.1.4.2 of the OEB's Electrical Reporting and Record Keeping Requirements) as an event that "is beyond the control of the distributor and is unforeseeable, unpredictable, unpreventable or unavoidable. Approximately 1.5 hours. No Outage review meetings to determine ways we can restore power sooner. PUC Distribution Inc. PUC Distribution Inc. 2018 2018-10-23T00:00:00 2018-10-04T00:00:00 00:38 AM Yes - Environment Canada issued various statements leading up to the event. Yes - PUC Distribution made arrangements to have additional field and operation resources on standby. PUC Distribution has a standby schedule for management staff who are required to be available on a 24/7 basis. PUC Distribution has a comprehensive Emergency Preparedness and Restoration Plan that is continually being updated. In addition to the plan, a meeting is held annually with the emergency response team to review the emergency plan and any updates. The trai The weather event of October 4th was consistent with the OEB definition of "Major Event" (as set out in Section 2.1.4.2 of the OEB's Electrical Reporting and Record Keeping Requirements) as an event that "is beyond the control of the distributor and is unforeseeable, unpredictable, unpreventable or unavoidable. Approximately 5.5 hours. No Outage review meetings to determine ways we can restore power sooner. PUC Distribution Inc. PUC Distribution Inc. 2018 2018-11-02T00:00:00 2018-10-26T00:00:00 1:54 AM No No PUC Distribution has a comprehensive Emergency Preparedness and Restoration Plan that is continually being updated. In addition to the plan, a meeting is held annually with the emergency response team to review the emergency plan and any updates. The trai Foreign interference event of October 26th was consistent with the OEB definition of "Major Event" (as set out in Section 2.1.4.2 of the OEB's Electrical Reporting and Record Keeping Requirements) as an event that is "beyond the control of the distributor and is unforeseeable; unpredictable; unpreventable or unavoidable. Approximately 1 hour and 33 minutes. No Outage review meetings to determine ways we can restore power sooner. Sioux Lookout Hydro Inc. Sioux Lookout Hydro Inc. 2018 2018-02-12T00:00:00 2017-10-18T00:00:00 01:31 PM No N/A N/A This event was considered a major event due to the SAIDI/day exceeding the TMed calculation. Only 239 customers were affected, however the outage lasted almost nine hours due to the extent of the damage. 8.82 hours No N/A Synergy North Corporation Thunder Bay Hydro Electricity Distribution Inc. 2018 2018-03-22T13:57:13 2017-12-05T00:00:00 04:25 AM Thunder Bay Hydro received short term notice of adverse weather expected in the area by Environment Canada; however the outages in consideration were actually caused by the galloping of conductors, and this was not possible to forecast. Thunder Bay Hydro regularly schedules staff to be available on standby regardless of the possibility of a Major Event Day (MED) occurring. This staffing schedule includes one line supervisor, two field staff (on call) and a system control operator on duty. When the first outages began on the day of the event (December 5th 2017 at approx. 4:30am) the on call staff were called in to assist. By 8am the full complement of staff available to Thunder Bay Hydro was deployed to assist with outages. Yes, Thunder Bay Hydro last reviewed its Emergency Preparedness Plan in detail on November 13, 2017. On December 5th, 2017, Thunder Bay and its surrounding areas experienced a period of moderately severe winter weather which was predicted with some advance warning given typical weather trends for the area at that time of year. What was not foreseeable, predictable, preventable or avoidable, was the resonant condition of harmonic motion at the specific wind speed and direction (West at 50-70km/h), which caused extreme galloping of Thunder Bay Hydro?s conductors. This extreme galloping was at a level reported by the experienced field staff, not witnessed in more than 30 years of service. The galloping of conductors caused phases to make contact with each other, and breakers to open (more than 120 breaker operations in a single day). This frenzy of breaker activity and dangerous field condition handicapped Thunder Bay Hydro?s ability to make progress restoring customers until late in the afternoon when wind conditions had changed. https://www.youtube.com/watch?v=9PvgWIhenZo The number of customer minutes of outage experienced in this one day, nearly doubled Thunder Bay Hydro?s SAIDI compared to the remainder of the year (from 1.86 to 3.44) It took approximately 9.5 Hours to restore 90% of Thunder Bay Hydro customers (based on the duration of the level 2 emergency). No Thunder Bay Hydro is reviewing its communication methods, crew deployment strategies, and key switch locations as a result of this adverse weather storm Toronto Hydro-Electric System Limited Toronto Hydro-Electric System Limited 2018 2018-06-01T00:00:00 2018-04-04T00:00:00 09.46 AM Yes also? Environment Canada issued various weather statements leading up to the event. Toronto Hydro received updates from the Provincial Emergency Operations Centre (PEOC) and was actively monitoring the weather. Toronto Hydro made arrangements to have additional field and operations resources on shift at the predicted time of the event and requested an extension of shift as required. Toronto Hydro has a standby schedule for senior management and supervisory staff who are required to be available on a 24/7 basis to support with event restoration. Yes ? Toronto Hydro has an established training program for Major Events. Relevant training is executed throughout the year. The weather event of April 4, 2018 was consistent with the OEB definition of ?Major Event? (as set out in Section 2.1.4.2 of OEB?s Electricity Reporting and Record Keeping Requirements) as an event that ?is beyond the control of the distributor and is unforeseeable; unpredictable; unpreventable; or unavoidable?. Toronto Hydro received a significantly higher volume of calls from the public relative to a typical day. The impact of the weather event on the distribution system was unavoidable and practically unpredictable from a planning perspective. The reliability impact of the weather event met the Institute of Electrical and Electronics Engineers (IEEE) Standard 1366 definition of a Major Event Day (MED) as ?a day in which the daily System Average Interruption Duration Index (SAIDI) exceeds a Major Event Day threshold value?. SAIDI for the weather event was 8.81 exceeding Toronto Hydro?s threshold of 7.18. 7.5 hours No. Toronto Hydro via its Disaster Preparedness Management (DPM) program develops, implements and sustains a state of emergency readiness and response proficiency. In addition, Toronto Hydro routinely reviews design and construction standards and practices th Toronto Hydro-Electric System Limited Toronto Hydro-Electric System Limited 2018 2018-06-15T00:00:00 2018-04-15T00:00:00 14:00 hour Yes. From April 11, 2018 to April 15, 2018, Toronto Hydro received various weather statements and notifications of a potentially extreme weather event from the Provincial Emergency Operations Centre (PEOC), Environment Canada, and the Independent Electricity System Operator (IESO). Yes. Toronto Hydro had additional field and operations resources on shift at the predicted time of the event. The Toronto Hydro Incident Management Team was activated prior to the event and regular calls were held throughout the weekend of April 14 and April 15. Toronto Hydro has a standby schedule requiring senior management, supervisory and operational staff to be available on a 24/7 basis to support with event restorations. Due to the expected potential severity of the event, Toronto Hydro also engaged additional crews and contractors to be available on standby. Yes. Toronto Hydro has an established training program for the management of major events with relevant training being executed throughout the year. Toronto Hydro has adopted the Ontario Incident Management System, the provincial recommended practice for The weather event of April 15 was consistent with the OEB definition of ?Major Event? (as set out in Section 2.1.4.2 of OEB?s Electricity Reporting and Record Keeping Requirements) as an event that ?is beyond the control of the distributor and is unforeseeable; unpredictable; unpreventable; or unavoidable?. Toronto Hydro received a significantly higher volume of calls from the public relative to a typical day. The impact of the weather event on the distribution system was unavoidable and practically unpredictable from a planning perspective. The reliability impact of the weather event met the Institute of Electrical and Electronics Engineers (IEEE) Standard 1366 definition of a Major Event Day (MED) as ?a day in which the daily System Average Interruption Duration Index (SAIDI) exceeds a Major Event Day threshold value?. SAIDI for the weather event was 12.03, exceeding Toronto Hydro?s threshold of 7.18. It took approximately 12.5 hours to restore 90% of the affected customers. No. Through its Disaster Preparedness Management (DPM) program, Toronto Hydro develops, implements and sustains a state of emergency readiness and response proficiency. Toronto Hydro is also an active and participating member of two mutual assistance groups: Toronto Hydro-Electric System Limited Toronto Hydro-Electric System Limited 2018 2018-07-04T00:00:00 2018-05-04T00:00:00 10.06 hour Yes. Toronto Hydro received various weather statements and notifications from Environment Canada and Provincial Emergency Operations Centre (PEOC). Yes. Toronto Hydro had additional field and operations resources on shift at the predicted time of the event and requested and requested an extension of shifts as deemed necessary. Toronto Hydro has a standby schedule requiring senior management, supervisory and operational staff to be available on a 24/7 basis to support with event restorations. Due to the expected potential severity of the event, Toronto Hydro also engaged additional crews and contractors to be available on standby. Yes. Toronto Hydro has an established training program for the management of major events with relevant training being executed throughout the year. Toronto Hydro has adopted the Ontario Incident Management System, the provincial recommended practice for The weather event of May 4, 2018 was consistent with the OEB definition of ?Major Event? (as set out in Section 2.1.4.2 of OEB?s Electricity Reporting and Record Keeping Requirements) as an event that ?is beyond the control of the distributor and is unforeseeable; unpredictable; unpreventable; or unavoidable?. This event was unavoidable and unpreventable and Toronto Hydro received a significantly higher volume of calls from the public relative to a typical day. In addition, the reliability impact of the weather event met the Institute of Electrical and Electronics Engineers (IEEE) Standard 1366 definition of a Major Event Day (MED) as ?a day in which the daily System Average Interruption Duration Index (SAIDI) exceeds a Major Event Day threshold value?. It took approximately 26 hours to restore 90% of the affected customers. No. Through its Disaster Preparedness Management (DPM) program, Toronto Hydro develops, implements and sustains a state of emergency readiness and response proficiency. Toronto Hydro is also an active and participating member of two mutual assistance groups: Toronto Hydro-Electric System Limited Toronto Hydro-Electric System Limited 2018 2018-08-14T00:00:00 2018-06-13T00:00:00 16:17 PM Yes. Toronto Hydro received various weather statements and notifications from Environment Canada and Provincial Emergency Operations Centre (PEOC). Yes. Toronto Hydro had additional field and operations resources on duty at the predicted time of the event and requested shift extensions as necessary. Toronto Hydro has a standby schedule requiring senior management, supervisory and operational staff to be available on a 24/7 basis to support with event restorations. Due to the expected severity of the event, Toronto Hydro also engaged additional crews and contractors to be available, if required. Yes. Toronto Hydro has an established training program for the management of major events with relevant training being executed throughout the year. Toronto Hydro has adopted the Ontario Incident Management System, the provincial recommended practice for The weather event was consistent with the definition of a ?Major Event? as set out in Section 2.1.4.2 of OEB?s Electricity Reporting and Record Keeping Requirements. This includes events that are beyond the control of the distributor, take significantly longer than usual to repair, and affect a substantial number of customers. The event was unavoidable and unpreventable and Toronto Hydro experienced greater than normal call volume. It took approximately 7 hours to restore 90% of the affected customers. Mutual assistance was not utilized. Through its Disaster Preparedness Management (DPM) program, Toronto Hydro develops, implements and sustains a state of emergency readiness and response proficiency. Toronto Hydro is also an active and participating member of two mutual assistance groups: Toronto Hydro-Electric System Limited Toronto Hydro-Electric System Limited 2018 2018-09-28T11:17:28 2018-07-28T00:00:00 00:39 AM Toronto Hydro did not have prior warning. This event was due to a Loss of Supply at the Finch Transmission Station operated by our transmission partner. As stated above, Toronto Hydro did not have prior warning. However, the organization maintains standby schedule requiring senior management, supervisory and operational staff to be available on a 24/7 basis to support with event restoration. Yes. Toronto Hydro has an established training program for the management of Major Events with relevant training being executed throughout the year. The Ontario Incident Management System (IMS), the provincial recommended practice for incident management, The event was consistent with the definition of a ?Major Event? as set out in Section 2.1.4.2 of OEB?s Electricity Reporting and Record Keeping Requirements. This includes events that are beyond the control of the distributor, take significantly longer than usual to repair, and affect a substantial number of customers. The event was unforeseeable, unavoidable and unpreventable and Toronto Hydro experienced greater than normal call volume. It took approximately 14 hours to restore 90% of the affected customers. Mutual assistance was not utilized. Through its Disaster Preparedness Management (DPM) program, Toronto Hydro develops, implements and sustains a state of emergency readiness and response proficiency. In addition, Toronto Hydro reviews contingency readiness of feeders and where needed, inst Wasaga Distribution Inc. Wasaga Distribution Inc. 2018 2018-11-27T14:29:15 2018-11-13T00:00:00 05:49 AM Wasaga Distribution was aware that a wet snow accumulation warning had been issued from the short term weather forecast. The snow began during the night of November 13, 2018. Field staff were aware that additional assistance may be required. Wasaga Distribution?s staff is experienced with effects of a wet snow and the responses required. The Ontario Energy Board has defined a Major Event as: ?Major Event? is defined as an event that is beyond the control of the distributor and is: a) Unforeseeable; b) Unpredictable; c) Unpreventable; or d) Unavoidable. This wet snow accumulation was beyond the control of the distributor and is both unavoidable and unpreventable. It took 1.35 hours to restore power to more than 90 percent of its customers. Wasaga Distribution did not receive assistance during the Major Event. Wasaga Distribution has: - Debriefed staff to discuss lessoned learned - Confirmed the existing maintenance and capital programs that assisted in minimizing the customers interrupted during the Major Event. Wellington North Power Inc. Wellington North Power Inc. 2018 2018-10-23T11:36:46 2018-08-29T00:00:00 02:31 am No, Wellington North Power Inc. did not have prior warning that the Major Event would occur. Not applicable. Yes. Through daily work, training and preparedness ensures that Wellington North Power Inc.?s Operations staff and equipment are ready to respond when required. Wellington North Power Inc. (WNP) classifies this event as a ?Major Event? based upon the ?Threshold Major Event Day? (TMED) calculation. The TMED calculation for this event was above the previous 5-year historical years outages recorded for WNP. The 5-year historical TMED for Wellington North Power is 13.63698 calculated by: nlog-average ? = (3.26255) nlog-std. deviation ? = 2.35013 ? + ? = 2.61279 TMED = 13.63698 The 5-year historic period (2013 to 2017 inclusive) is used to determine TMED and this threshold is applied during the current (2018) reporting year. For the ?Loss of Supply? event that occurred on August 29th 2018, the calculated the System Average Interruption Duration Index (SAIDA), in minutes, was 229.1025 which is above the 5-year historical TMED amount of 13.63698 as illustrated above. The ?Loss of Supply? event was unforeseeable, unpredictable, unpreventable, unavoidable, unplanned and beyond the control of the distributor. The interruption was caused by a Loss of Supply and consequently 100% of customers? power was restored when the repair was made. 100% of customers? power was restored in 5 hours and 25 minutes. No. The event was a Loss of Supply. The Ontario Grid Control Centre confirmed that the fault was a broken conductor which was interrupting approximately 8 MW of Hydro One and LDC load. Once repairs to the broken conductor was completed the power was restored Wellington North Power Inc. Wellington North Power Inc. 2018 2018-10-25T11:04:59 2018-09-01T00:00:00 9:35pm No, Wellington North Power Inc. did not have prior warning that the Major Event would occur. Not applicable. Yes. Through daily work, training and preparedness ensures that Wellington North Power Inc.?s Operations staff and equipment are ready to respond when required. Wellington North Power Inc. (WNP) classifies this event as a ?Major Event? based upon the ?Threshold Major Event Day? (TMED) calculation. The TMED calculation for this event was above the previous 5-year historical years outages recorded for WNP. The 5-year historical TMED for Wellington North Power is 13.63698 calculated by: nlog-average ? = (3.26255) nlog-std. deviation ? = 2.35013 ? + ? = 2.61279 TMED = 13.63698 The 5-year historic period (2013 to 2017 inclusive) is used to determine TMED and this threshold is applied during the current (2018) reporting year. For the ?Loss of Supply? event that occurred on September 1st 2018, the calculated the System Average Interruption Duration Index (SAIDA), in minutes, was 113.1545 which is above the 5-year historical TMED amount of 13.63698 as illustrated above. The interruption was caused by a Loss of Supply and consequently 100% of customers? power was restored when the repair was made. 100% of customers? power was restored in 2 hours and 40 minutes. No The event was a Loss of Supply. The Ontario Grid Control Centre confirmed that the Hanover M5 feeder was removed from service to enable repairs to the M4 feeder. Power to Hanover M5 feeder was restored at approx. 12:15am on September 2nd 2018 which result Alectra Utilities Corporation Alectra Utilities Corporation 2017 2017-05-05T08:32:22 2017-03-08T00:00:00 No n/a Yes. Alectra Inc. has a Corporate Emergency Plan supported by individual Emergency Plans for each of its four rate zones including the Horizon Utilities rate zone covering the Hamilton and St. Catharine's service areas. The Emergency Plan is based on the Strong winds impacting the Hamilton and St. Catharines service areas commenced at 11:06am. The strong winds continued through the remainder of the day and were the root cause of the majority of outages. The total customer minutes of interruptions experienced on March 8, 2017 due to outages that started on the same day exceeded the Major Event Day threshold of 1.84 million customer minutes. 9 hours No. Alectra Utilities is taking steps, as follows: 1) Providing contingency training to staff regarding backup power supplies for automated switches. 2) Improving the damage assessment process, prioritization of response strategy, and improving communications Alectra Utilities Corporation Alectra Utilities Corporation 2017 2017-05-29T11:04:41 2017-04-07T00:00:00 No. N/A Yes. Alectra Inc. has a Corporate Emergency Plan supported by individual Emergency Plans for each of its four rate zones including the PowerStream rate zone covering the Alliston, Aurora, Barrie, Beeton, Bradford, Markham, Penetanguishene, Richmond Hill, High winds gusting up to 76km/h and blowing snow/rain/ice accretion in portions of the Simcoe County service area caused "galloping" of conductors and equipment failure. Temperature ranged between 0 and -4 C. Galloping is the high-amplitude, low-frequency oscillation of overhead power lines due to wind. The total customer minutes of interruptions experienced on April 7, 2017 due to outages that started on the same day exceeded the Major Event Day threshold of 2.2 million customer minutes. 9 hours. No. 1. Additional spacers are being deployed between circuits to prevent galloping conductors short circuiting during severe weather conditions. 2. Engineering is improving the design for the pole infrastructure where the galloping conductor issues occurred. Alectra Utilities Corporation Alectra Utilities Corporation 2017 2017-12-13T00:00:00 2017-10-15T00:00:00 3:04 PM No, as weather alerts were issued at the time of the storm. The distributor did not have prior warning. Yes. Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its four rate zones including the Enersource rate zone, covering the City of Mississauga. The Emergency Plan is based on the Incident Management Syst Winds up to 102km/h were recorded at Pearson Airport. This not only impacted the Enersource Rate Zone but neighbouring municipalities as well. This is outside of the control of Alectra Utilities as the event was not caused by any defects in our electrical system. The outages on October 15th, 2017 amounted to a SAIDI of 5.70 which exceeded the Major Event Day Threshold of 3.03. 90% of the customers were restored in 5 hours and 34 minutes. No. Given the nature/severity of the event, mutual assistance was not required. Staff training is part of an ongoing process per the Alectra Utilities Emergency Plan. New systems such as the Incident Management System have been rolled out as part of regular training. Alectra Utilities Corporation Alectra Utilities Corporation 2017 2017-12-13T00:00:00 2017-10-15T00:00:00 3:13 PM (D No, as weather alerts were issued at the time of the storm. The distributor did not have prior warning. Yes. Alectra Utilities has a Corporate Emergency Plan supported by individual Emergency Plans for each of its four rate zones including the PowerStream rate zone covering the Alliston, Aurora, Barrie, Beeton, Bradford West Gwillimbury, Markham, Penetangui Peak wind recorded at Pearson Airport was 102km/h at 3:22PM EDT. In post event discussion with Environment Canada, based on the damage done in and around the GTA and other parts of Southern Ontario, there could have been peak winds in the 110 to 120 km/h range. These winds in Vaughan caused pole failures in several locations. The total customer minutes of interruptions experienced was 5,430,744 on October 15, 2017 on the same day exceeded the Major Event Day threshold of 2.2 million customer minutes. 90% of the customers interrupted were restored within 4 hours. No. Given the nature/severity of the event, mutual assistance was not required. Alectra Utilities has developed and undertaken a storm hardening initiative that incorporates the following: 1. Storm hardening ? Pole upgrades 2. Additional guying of overhead system Alectra Utilities Corporation Hydro One Brampton Networks Inc. 2017 2017-03-16T16:22:17 2017-01-11T00:00:00 Yes. Weather Service Warning of high winds, although conditions ended up being far worse. Yes. Two Operators on standby (called in at 03:00). Lines and Substations available via an emergency call in list. General training in Emergency Preparedness, Situational Awareness, etc. but this event was thought to become more of a workload issue. The SAIDI duration of this event exceeded the 5 year Threshold. 3 hours No. 1) Review of communication protocols between field staff, control room and Management. 2) Streamlining of Environmental clean-up. 3) Tree trimming and feeder patrol options being examined Algoma Power Inc. Algoma Power Inc. 2017 2017-08-10T08:04:09 2017-06-11T00:00:00 Environment and Climate Change Canada issued a Severe Thunderstorm Warning shortly before the first storm arrived (@ 4:08pm). Forecasts published earlier in the day predicted the possibility of thunderstorms, though there was no prior warning of the severe intensity of the storm and the number of fallen trees that would result. Not Applicable (N/A) API has a Business Continuity and Disaster Recovery Plan that is periodically updated and reviewed at the management level. This plan is designed to assist in the response to natural disasters, accidents, major outages, environmental disasters, municipal API considered this a Major Event due the unforeseen and uncontrollable nature of the storm?s intensity and the resulting substantial impact on API?s network and customer base. The magnitude of the level of destruction, number of interruptions and significant response required confirmed API?s perspective that this episode should be categorized as a Major Event. It took approximately 42 hours to restore 90% of the customers who were interrupted by this Major Event. API did not utilize assistance through a third party mutual assistance agreement, however several parties were leveraged to provide assistance throughout the multi-day restoration effort. This included multiple crews and equipment provided by the neighbou API conducted a round table discussion with contributors from all company departments, to review all facets of the Major Event, including the event itself, response and restoration efforts, resource allocation and technological assistance. Atikokan Hydro Inc. Atikokan Hydro Inc. 2017 2017-05-04T14:03:41 2016-06-19T00:00:00 No N/A; no prior warning Staff are aware we have a Mutual Assitance Agreement in place in the event additional assitance is required. Atikokan Hydro considers this a major event because as per the definition the major event is beyond thr econtrol of Atikokan Hydro and is unforesseable. Beyond the control of the distributor includes loss of supply events. A substantial number of customers were affected; given all of Atikokan Hydro's customers were affected by the outage. This is using the fixed percentage approach given Atikokan Hydro does not have the ability to use the IEEE Standard 1366 method. It took 6 hours to restore 90% of the customers who were interrupted. In responding to the Major Event, Atikokan Hydro did not utilize assistance throug ha third part mutual assistance agreement. This major event was a result of loss of supply from Hydro One. Atikokan Hydro follows up with Hydro One each outage to determine the cause and what can be done to eliminate such outages occuring again. Hydro One is working on communication cable upgrades Bluewater Power Distribution Corporation Bluewater Power Distribution Corporation 2017 2017-05-10T14:22:17 2017-03-08T00:00:00 On 5 a.m. on March 8, 2017, Bluewater Power ("BWP") received a wind warding for East and West Lambton. At this point BWP began monitoring the weather stations and the Hydro One Networks ("HONI") website for information The outage occurred at noon on March 8th, as such BWP was fully staffed and at that point did not need extra employees. Bluewater has a comprehensive Emergency Response Plan that is continually being updated, with the last update in May 2016. In addition to the plan, a meeting is held annually with the emergency response team to review the emergency plan and any updates. T The TMED for 2017 is 18.30154 based on the 2012-2016 period. This outage had a TMED of 44.5069 therefore was considered a Major Event. This event was solely a Loss of Supply event, however it was determined to be a major event because of the number of Bluewater Power customers impacted, and the long duration of the outage. Approx 6.5 hours No, assistance was not required. Bluewater was fully prepared for this outage, and handled it in accordance with the Emergency Plan without incident. Enova Power Corp. Waterloo North Hydro Inc. 2017 2017-05-18T00:00:00 2017-03-30T00:00:00 The Weather Network, Environment Canada and similar authorities had issued special weather statements and freezing rain warnings in advance of the major event. WNH normal after hours on call staff were readily available. This is comprised of (1) Line Supervisor, two (2) Powerline Maintainers (PLM’s,) one (1) Protection and Control Technician (P+C Tec) and one (1) Meter Technician. In addition, all PLM’s are on a call out list. Additional PLM staff were called out and utilized on March 30, 2017. WNH Operations employees are on call or on standby as part of their employment. Expectations to respond and work long days if required are known. Non-Operations staff were not utilized during this Major Event Day. Training was provided for Call Handling a March 30, 2017 has exceeded the IEEE 1366-2012 2.5ß threshold at 0.0990 SAIDI/day. WNH utilizes the preferred method of 2.5ß and has calculated the 2017 TMED (Threshold, Major Event Days) to be 0.0709 SAIDI/day by using 2012 through 2016 historical data. The most prominent contributing interruption of this Major Event Day was a tree which had fallen during a freezing rain event and therefore considered unforeseen. Less than two hours from the start of the most prominent outage event. No. WNH deployed tree trimming crews to this area for additional, more aggressive tree trimming or tree clearing. Continued awareness and continued advanced preparation of additional On Call resources. ERTH Power Corporation ERTH Power Corporation 2017 2017-05-10T16:19:55 2016-07-22T00:00:00 NO PRIOR WARNING N/A STAFF TRAINED ON ERIE THAMES EMERGENCY PREPAREDNESS PLAN AND EMERGENCY RESPONSE PLAN ERIE THAMES USES FIXED PERCENTAGE APPROACH TO DETERMINE MAJOR EVENT. 10 % OF TOTAL CUSTOMERS WITH AN OUTAGE OF GREATER THAN 5 MINUTES. THIS EVENT FELL WITHIN THE CRITERIA/ 4 HOURS NO NOT APPLICABLE -LOSS OF SUPPLY Festival Hydro Inc. Festival Hydro Inc. 2017 2017-11-28T13:39:22 2017-10-15T00:00:00 01:39 PM No N/A Festival Hydro completes an annual review and round table discussion on its emergency preparedness plan and updates the plan on an annual basis. Extreme rain and wind storm with wind gusts greater than 100km/h caused tree limbs and uprooted trees to fall on overhead power lines. Using the IEEE Standard 1366 method, the event exceeded the Major Event Day Threshold with 796,376 customer minutes. 3 hours and 28 minutes No Discussions were held with staff after the event to review outage communications during the event and to evaluate the restoration process effectiveness. A new process to share outage information during events has been adopted. Hydro One Networks Inc. Hydro One Networks Inc. - 1937680 Ontario Inc. (Peterborough Distribution) 2017 2017-11-28T09:13:30 2017-10-15T00:00:00 04:11 PM Yes. There were weather advisories that were in place in advance of the storm that warned of high winds and intense storm cells due to a cold front moving across the province. However, the potential impact of the storm was difficult to quantify when compared to a hurricane, tornado, or major ice storm. No extra employees were called on standby ahead of the storm. There was no clear indication that this storm would cause as much significant damage as it did. We perform periodic test scenarios for major outages in our control centre to enhance our state of readiness. This event should be considered to be a Major Event since it was caused by an intense windstorm with gusts up to 90 km/h. The trees that were brought down onto our lines during this event caused extensive damage to our assets, took significantly longer than usual to repair, and affected a substantial number of customers. 69% of our customers were unaffected by this storm 74% of customers were restored within 2 hours and 49 minutes 79% were restored within 3 hours and 28 minutes 83% were restored within 3:42 93% were restored within 4:24 No PDI has implemented a fault location, isolation, and restoration on our 27.6 kV distribution system. It is currently in test mode since full staff training is scheduled for later this year. This system triggered a switching order which would have automati Hydro Ottawa Limited Hydro Ottawa Limited 2017 2017-11-20T13:06:34 2017-09-27T00:00:00 03:08 PM Weather forecasts indicated that active weather was probable at 3:00 p.m. the afternoon of September 27, 2017. For the event, thunderstorms and heavy rain were expected as a cold front passed through. This occurred after several days of unseasonably warm temperatures. The forecast did not include any indication that we would receive damaging winds. Hydro Ottawa had a full complement of on-shift personnel, and a full on-call roster of field technicians and management personnel. All Operations groups were notified early in the day of the approaching weather. Hydro Ottawa has an established Electrical Emergency Response Plan and Organization. Formal training is completed annually according to Market Rules, and a weekly preparation meeting is held to refresh on-call management personnel. This event was considered to be a Major Event Day based on the IEEE Standard 1366 method. The SAIDI value of September 27, 2017 exceeded the daily SAIDI threshold, as determined by IEEE Standard 1366, based on the daily SAIDI values for the past five years. It took approximately 24 hours from the activation of our Electrical Emergency Response Plan to restore 90% of affected customers. No, not according to any formal Mutual Assistance Agreement. We did, however, use third-party contractors for forestry and lines work. A debrief of the event was held with all stakeholders. There will be continued focus on on-call and emergency response preparation. InnPower Corporation InnPower Corporation 2017 2017-07-31T11:42:16 2016-07-27T00:00:00 No N/A Yes the training for staff on the response for a Major Event is the same as all trouble calls and customer power interruptions. We have crews available during working business hours and one person on call available after business hours to respond to ident This event was a Major Event because of Tree Contact 2 hours and 25 minutes to restore 90% of customers No Ongoing staff emergency response, process improvements, as well as continual system upgrades of aging assets is being done. InnPower Corporation InnPower Corporation 2017 2017-07-31T11:42:40 2016-10-17T00:00:00 No N/A Yes the training for staff on the response for a Major Event is the same as all trouble calls and customer power interruptions. We have crew available during working business hours and one person on call available after business hours to respond to identi This Event was a Major Event because of Adverse Weather 3 hours and 28 minutes to restore 90% of customers No Ongoing Staff emergency response, process improvements, as well as continual system upgrades of aging assets is being done InnPower Corporation InnPower Corporation 2017 2017-07-31T11:43:03 2016-10-18T00:00:00 No N/A Yes, the training for staff on the response for a Major Event is the same as all trouble calls and customer power interruptions. We have crews available during working business hours and one person on call available after business hours to respond to iden This Event was a Major Event because of Adverse Weather 2 Hours and 23 minutes to restore 90% of customers No Ongoing Staff Emergency response, process improvements, as well as continual system upgrades of aging assets is being done. InnPower Corporation InnPower Corporation 2017 2017-07-31T11:43:30 2016-11-21T00:00:00 No N/A Yes, the training for staff on the response for a Major Event is the same as all trouble calls and customer power interruptions. We have crews available during working business hours and one person on call available after business hours to respond to iden This Event was a Major Event because of Adverse Weather 1 hour and 48 minutes to restore 90% of customers No Ongoing staff emergency response, process improvements, as well as continual system upgrades of aging assets is being done. Lakeland Power Distribution Ltd. Lakeland Power Distribution Ltd. 2017 2017-09-21T00:00:00 2017-05-18T00:00:00 No. N/A No. This event is considered a Major Event as it meets all criteria specified in the OEB File EB-2015-0182 and RRR Section 2.1.4.2. 4.28 hrs. No. LPDL reviewed the existing mutual assistance agreements to ensure that they were current and relevant. Lakeland Power Distribution Ltd. Lakeland Power Distribution Ltd. 2017 2017-09-21T00:00:00 2017-07-07T00:00:00 No. N/A No. This event is considered a Major Event as it meets all criteria specified in the OEB File EB-2015-0182 and RRR Section 2.1.4.2. 20.22 hrs No. LPDL reviewed the existing mutual assistance agreements to ensure that they were current and relevant. London Hydro Inc. London Hydro Inc. 2017 2017-04-03T17:18:29 2017-03-08T00:00:00 Yes, London hydro was aware of the weather forecast. In addition, Environment Canada issued a high wind warning for Southwestern Ontario. The Major Event started during normal working hours. London Hydro had all employees available to assist during the event and put contractors on alert. London Hydro provides annual training to all supervisory staff that are involved in Major Event response. The last training session was held on December 13, 2016. This session included training on the roles and responsibilities of each member of the team This event was related to extreme winds. Based on the definition of a Major Event in the ?Electricity Distribution System Reliability: Major Events, Reporting on Major Events and Customer Specific Measures? report issued by the OEB, this event was beyond the control of London Hydro. As well, based on the IEEE Standard 1366 (2.5 Beta method) this event was considered to be a Major Event since the daily SAIDI and SAIFI values recorded exceeded the MED threshold values. It took 11 hours to restore more than 90% of the customers who were interrupted. London Hydro did not invoke the third party mutual assistance agreement; however, London Hydro used third party contractors through private agreements. London Hydro has an Emergency Procedures Plan which is complemented by the execution of a mock tabletop exercise annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of e London Hydro Inc. London Hydro Inc. 2017 2017-08-24T13:15:29 2017-06-24T00:00:00 No. This event was caused by a vehicle accident. Not applicable. London Hydro provides annual training to all supervisory staff that are involved in major event response on their roles and responsibilities. The last training session was held on December 13th, 2016. This session included training on the roles and respon Based on the definition of a Major Event in the ?Electricity Distribution System Reliability: Major Events, Reporting on Major Events and Customer Specific Measures? report issued by the OEB, this event was beyond the control of London Hydro. As well, based on the IEEE Standard 1366 (2.5 Beta method) this event was considered to be a Major Event since the daily SAIDI and SAIFI values recorded exceeded the MED threshold values. The SAIDI and SAIFI threshold values were set based on the daily SAIDI and SAIFI values for the past 5 years. It took 1 hour 52 minutes to restore 90% of the customers who were interrupted. London Hydro utilized the assistance of a third party private contractor through an existing agreement. London Hydro has an Emergency Procedures Plan that is complemented by the execution of a mock tabletop exercise annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of ex London Hydro Inc. London Hydro Inc. 2017 2017-10-10T15:16:38 2017-08-10T00:00:00 No. This event was caused by a Loss of Supply. Not applicable. London Hydro provides annual training to all supervisory staff that are involved in major event response on their roles and responsibilities. The last training session was held on December 13th, 2016. This session included training on the roles and respon Based on the definition of a Major Event in the ?Electricity Distribution System Reliability: Major Events, Reporting on Major Events and Customer Specific Measures? report issued by the OEB, this event was beyond the control of London Hydro. As well, based on the IEEE Standard 1366 (2.5 Beta method) this event was considered to be a Major Event since the daily SAIDI and SAIFI values recorded exceeded the MED threshold values. The SAIDI and SAIFI threshold values were set based on the daily SAIDI and SAIFI values for the past 5 years. It took 1 hour to restore 90% of the customers who were interrupted. London Hydro did not invoke a third party mutual assistance agreement; however, London Hydro used third party contractors through private agreements. London Hydro has an Emergency Procedures Plan that is complemented by the execution of a mock tabletop exercise annually. The purpose of the Emergency Procedures Plan is to define the roles and responsibilities of London Hydro personnel in the event of ex Newmarket-Tay Power Distribution Ltd. Midland Power Utility Corporation 2017 2017-04-16T10:32:02 2017-08-17T00:00:00 Midland PUC was aware there were high wind warnings in the weather forecast on the day of the Major Event (August 17, 2016). The high winds began early in the day on August 17, 2016. All staff were available, if required. Midland PUC staff have been trained on response plans using other storms to hone our skills. The Ontario Energy Board has defined a Major Event as: A Major Event is defined as an event that is beyond the control of the distributor and is: a) Unforeseeable; b) Unpredictable; c) Unpreventable; or d) Unavoidable. This wind storm was beyond the control of the distributor and is both unavoidable and unpreventable. 64 percent of the customers that experienced a sustained outage were restored in 3.75 hours. 26 percent of the customers that experienced a sustained outage were restored in 5.5 hours. No. As in the past, Midland PUC will continue to: - Debriefed staff to discuss lessons learned - Inspect existing and remove legacy 44KV line openers - Ensure our capital and maintenance programs are designed minimize the number of customers affected by a maj Newmarket-Tay Power Distribution Ltd. Midland Power Utility Corporation 2017 2017-06-21T00:00:00 2016-06-13T00:00:00 No No Midland PUC staff have been trained on response plans using other storms to hone our skills. The Ontario Energy Board has defined a Major Event as: ?Major Event? is defined as an event that is beyond the control of the distributor and is: a) Unforeseeable; b) Unpredictable; c) Unpreventable; or d) Unavoidable. This event was beyond the control of the distributor and is both unavoidable and unpreventable loss of supply. 100 percent of the customers that experienced a sustained outage were restored in 4.8 hours. No As in the past, Midland PUC will continue to: - Debriefed staff to discuss lessons learned - Improve communication with the supply authority - Ensure our capital and maintenance programs are designed minimize the number of customers affected by a major ev North Bay Hydro Distribution Limited Espanola Regional Hydro Distribution Corporation 2017 2017-05-15T15:04:35 2016-08-20T00:00:00 NO No prior warning No specific training for Major event however Supervisor participates in Area Disaster Preparedness Meetings. Exceeded 10% threshold customers without power 2 No Vegetation management, system upgrades and training are ongoing. Budgeted yearly. Potential issues are identified through monthly inspections. System upgrades are included in the 5 Year plan. North Bay Hydro Distribution Limited Espanola Regional Hydro Distribution Corporation 2017 2017-05-16T00:00:00 2016-08-18T00:00:00 No No warning No Exceeded 10% threshold customer without power .5 hour No Loss of Supply out of our control North Bay Hydro Distribution Limited Espanola Regional Hydro Distribution Corporation 2017 2017-07-26T13:36:25 2017-07-07T00:00:00 No No prior warning No specific training for Major event however Supervisor participates in Area Disaster Preparedness Meetings Exceed 10% threshold customers without power .25 No No steps North Bay Hydro Distribution Limited Espanola Regional Hydro Distribution Corporation 2017 2017-11-28T00:00:00 2017-10-24T00:00:00 6 :40 am No N/A No 100% of customers off for 10 minutes 16% of customers off for 5 hours 3 Hours No unknown North Bay Hydro Distribution Limited Espanola Regional Hydro Distribution Corporation 2017 2017-11-28T00:00:00 2017-11-10T00:00:00 2:00 pm No N/A No 100% of Customers off for 10 minutes 16% of Customers off for 5 hours 3 hours No Unknown Orangeville Hydro Limited Orangeville Hydro Limited 2017 2017-05-15T00:00:00 2017-01-17T00:00:00 No, Orangeville Hydro was aware that rain, freezing rain, and wind was within the short term weather forecast for January 17, 2017 however Orangeville Hydro did not have prior warning of the Loss of Supply Event that occurred due to Hydro One?s galloping conductors on the M25 Feeder. This event occurred during the work hours of Tuesday January 17th, 2017. Therefore, all available field and office staff were on duty. Orangeville Hydro?s staff are experienced with effects of freezing rain and windy conditions and the responses required to freezing rain events. Orangeville Hydro?s staff are experienced with effects of Loss of Supply events and the responses required to The Ontario Energy Board has defined a Major Event as: ?Major Event? is defined as an event that is beyond the control of the distributor and is: a) Unforeseeable; b) Unpredictable; c) Unpreventable; or d) Unavoidable. The OEB has also stated: ?Beyond the control of the distributor? means events that include, but are not limited to, force majeure events and Loss of Supply events. This Loss of Supply was beyond the control of the distributor and is both unpredictable and unavoidable for Orangeville Hydro. All of the 4,211 customers were restored at the same time. This took 0.58 hours (35 minutes). Orangeville Hydro did not receive assistance during the Major Event through a mutual assistance agreement. Hydro One and Orangeville Hydro worked together to locate the root cause of the issue and determine an acceptable restoration plan. Orangeville Hydro has: - Debriefed staff to discuss lessoned learned - Reviewed & Updated Community Contact Lists for Streamlined Press Releases (Local Media, Municipal Staff, Municipal Council, County Emergency Management) - Confirmed the existing mainte Ottawa River Power Corporation Ottawa River Power Corporation 2017 2017-07-12T00:00:00 2016-06-21T00:00:00 No N/A N/A This was the storm that caused the most damage in the Pembroke service area in over twenty years. Isolated portions of the City were affected customers without power anywhere from one to seventeen hours. In total more than 30% of customers were affected for a total of 19,313 customer hours. Just over 10 hours Yes...a crew from Renfrew Hydro helped restore services the following day. A debriefing session was held with operations manager, CEO and control room manager. A list of lessons learned was prepared and reviewed with entire crew during a full post event meeting. PUC Distribution Inc. PUC Distribution Inc. 2017 2017-05-23T15:09:15 2016-06-20T00:00:00 No. Although we subscribe to a Weather Service Warning system, no weather alerts were issued for the day. The forecast had indicated moderate winds. N/A, no prior warning. General training and drills associated with the IESO Emergency Preparedness Plans. Nothing specific to windstorms. The SAIDI duration of this event exceeded the 5 year Threshold and is considered to be unforeseeable, unpredictable, unpreventable or unavoidable. Approximately 5 hours from the first outages (4:40 PM) No In general terms major events such as this trigger a discussion by Operations staff where we identify aspects that worked well and those that can be improved upon. A recent example is using Technical staff from outside the Line area to mobilize and invest PUC Distribution Inc. PUC Distribution Inc. 2017 2017-06-15T00:00:00 2017-06-11T00:00:00 Yes, a severe thunderstorm watch and a severe thunderstorm warning was issued by The Weather Network via email. No. General training and drills associated with the IESO Emergency Preparedness Plans, nothing specific to lightning. The SAIDI duration of this event exceeded the 5 year Threshold and is considered to be unforeseeable, unpredictable, unpreventable or unavoidable. Approximately 1 hour. No. No. PUC Distribution Inc. PUC Distribution Inc. 2017 2017-09-12T00:00:00 2017-08-02T00:00:00 Yes, severe thunderstorm warning was issued by the weather network. No General training and drills associated with the IESO Emergency Preparedness Plan. No training specific to lightning. The SAIDI duration of this event exceeded the 5 year average threshold and is considered to be unforeseeable, unpredictable, unpreventable and unavoidable. Approximately 2 hours. No Outage review meetings. Determine ways we can restore power sooner. Sioux Lookout Hydro Inc. Sioux Lookout Hydro Inc. 2017 2017-04-06T15:36:37 2016-12-20T00:00:00 No. n/a n/a The event occured as a result of high winds and heavy snow which caused a tree to fall on a primary line connected to our F3 feeder which supplies the urban population of Sioux Lookout. This event was unforeseeable. It took 1:45 to restore 100% of the customers No Line patrols, tree trimming Sioux Lookout Hydro Inc. Sioux Lookout Hydro Inc. 2017 2017-05-04T00:00:00 2016-07-20T00:00:00 No n/a n/a The event occured as a result of loss of supply from Hydro One and was an unexpected outage. 5.34 hours No none Sioux Lookout Hydro Inc. Sioux Lookout Hydro Inc. 2017 2017-05-18T00:00:00 2017-05-17T00:00:00 No n/a n/a The event occured as a result of loss of supply from Hydro One and was an unexpected outage. 100% were restored at the same time - 6 hours No. Not our outage. None since the outage was caused by Hydro One. Tillsonburg Hydro Inc. Tillsonburg Hydro Inc. 2017 2017-05-11T00:00:00 2016-05-28T00:00:00 No as this was related to an animal contact. Not applicable Subsequent to this Major Event, Tillsonburg Hydro Inc. (THI) developed ?Communication Plan? to assist communications of a large outage. THI, in conjunction with the Town of Tillsonburg has an Emergency Response Plan for outages resulting from emergency si THI uses a fixed percentage approach to identify ?Major Events?. This major event impacted 2,400 customers (33.7%) of our customers for a period of 2 hours. This constitutes a Major Event under the THI thresholds. As this outage was the result of 1 feeder being impacted by an animal contact 100% of the customers were restored at the 2 hour mark. Third party mutual assistance was not warranted as this related to 1 feeder and one area of damage. While foreign interference (animal contact) can?t explicitly be prepared for, analysis of this event has driven a review of our response plan and communication plans. THI has also identified system upgrades that will minimize future outages from a loss of Tillsonburg Hydro Inc. Tillsonburg Hydro Inc. 2017 2017-06-28T14:10:49 2017-05-16T00:00:00 No, Tillsonburg Hydro did not have any prior notices for the major event as it was related to equipment failure. N/A As this event was not a pre-notified event, no specific training for response had been discussed. As this equipment failure was on one of Tillsonburg Hydro feeders, when the fault occurred power to approximately 3,200 (approx. 45% of customers) for 1 hours and 20 minutes. This falls within our more than 1 hours for more than 25% of Tillsonburg Hydro Customers It took 1 hour and 20 minutes to restore power to more than 90% of the customers (all but 1 customer was picked up in this time) No The faulty equipment was a porcelain switch. Through the 2017 capital budgeting process, porcelain switches are being replaced. It will take a few years to work through all porcelain switches and insulators within Tillsonburg Hydro's territory. Tillsonburg Hydro Inc. Tillsonburg Hydro Inc. 2017 2017-11-29T13:35:07 2017-10-28T00:00:00 03:15 am No, the Major Event was a result of a vehicle hitting a pole as a result no prior warning was available. Not applicable Staff are trained for major outages with pre-notification. Operations staff know who to call to get extra resources and call center staff are trained on how to respond large scale outages Tillsonburg Hydro had greater than 10% of our customers without power for greater than 2 hours. These metrics make this event a "Major Event" in our reporting. It took 5: 45 minutes to get 100% of the customers restored with power. Tillsonburg Hydro did not get above 90% until the 100% was achieved. No, Tillsonburg Hydro did not utilize a 3rd party mutual assistance agreement. Re-engineering of the system is being discussed to minimize the number of customers impacted and the duration. Toronto Hydro-Electric System Limited Toronto Hydro-Electric System Limited 2017 2017-12-14T08:49:23 2017-10-15T00:00:00 At approxi Yes ? Environment Canada issued various weather statements leading up to the event and Toronto Hydro was actively monitoring the weather. Toronto Hydro made arrangements to have additional field and operations resources on shift at the predicted time of the event. Toronto Hydro has a standby schedule for senior management and supervisory staff who are required to be available on a 24/7 basis to support with event restoration. Yes ? Toronto Hydro has an established training program for Major Events. Relevant training is executed throughout the year. The weather event of October 15, 2017 was consistent with the OEB definition of ?Major Event? (as set out in Section 2.1.4.2 of OEB?s Electricity Reporting and Record Keeping Requirements) as an event that ?is beyond the control of the distributor and is unforeseeable; unpredictable; unpreventable; or unavoidable?. Toronto Hydro received a significantly higher volume of calls from the public relative to a typical day. The impact of the weather event on the distribution system was unavoidable and practically unpredictable from a planning perspective. The reliability impact of the weather event met the Institute of Electrical and Electronics Engineers (IEEE) Standard 1366 definition of a Major Event Day (MED) as ?a day in which the daily System Average Interruption Duration Index (SAIDI) exceeds a Major Event Day threshold value?. SAIDI for the weather event was 8.52, exceeding Toronto Hydro?s threshold of 6.83. 12 hours. No. Toronto Hydro via its Disaster Preparedness Management (DPM) program develops, implements and sustains a state of emergency readiness and response proficiency. In addition, Toronto Hydro routinely reviews design and construction standards and practices th Wasaga Distribution Inc. Wasaga Distribution Inc. 2017 2017-04-26T00:00:00 2016-08-16T00:00:00 Weather service warning of high winds and thunderstorms in the area. extra employee were available due to weather forecasts. no arrangement were required, just aware employees. General training in emergency preparedness and situational awareness. Not within Wasaga Distribution's control and it exceeded IEEE Standard 1366 threshold. 5.75 Hours. Yes. We used a private contractor. We were well prepared. Wasaga Distribution Inc. Wasaga Distribution Inc. 2017 2017-04-26T00:00:00 2016-12-26T00:00:00 Weather service warning No. Emergency response training. Outside of Wasaga Distribution Control. Exceeded IEEE Standard 1366 threshold. 3.75 hrs. No. Review fuse coordination. Wasaga Distribution Inc. Wasaga Distribution Inc. 2017 2017-04-26T00:00:00 2017-01-17T00:00:00 Weather service forecast was calling for Freezing rain. No extras on duty, however employees were aware of weather forecast. Emergency preparedness training. Outside of Wasaga Distribution's control. Exceeded IEEE 1366 Standard. 1.5 hours. No. None are being taken. Wasaga Distribution Inc. Wasaga Distribution Inc. 2017 2017-04-26T09:09:59 2016-06-20T00:00:00 Yes, weather warning of high winds and wind gusts in the area. No, as this was during normal working hours. General training in emergency preparedness. Was outside of Wasaga Distribution's control and met the IEEE Standard 1366 threshold. .67 hours to restore 90% No. Confirmed existing capital and maintenance programs are where they need to be.