Topic:"Planned Outage" in M12707

Outage Restoration Profile: Metric Result Unique Customers Impacted 44,223 Customer Interruptions 56,114 Total Customer Hours 235,134 Event Start Time Dec 3 04:02 Event End Time Dec 3 18:21 Main Regions Impacted Valley, Northern, Halifax

AI summary The outage restoration profile details an event that impacted 44,223 unique customers, resulting in 56,114 customer interruptions and 235,134 total customer hours. The outage occurred between December 3, 04:02 and 18:21, primarily affecting the Valley, Northern, and Halifax regions.

Restoration began at the onset of storm-related outages and continued throughout the event until the last customer was restored at 19:04 on December 4, 2025. As a result, 100% of impacted customers were restored within the first 48 hours....

AI summary Restoration efforts began immediately after storm-related outages and continued until all customers were restored by 19:04 on December 4, 2025. All impacted customers were restored within 48 hours. Smaller outages were addressed after larger ones, often complicated by remote locations, tree contacts, or flooded areas. The event end time marks the beginning of the final outage, with restoration continuing beyond this time.

1 1 1 1 1 1 // \ 5 Zone Date/ Time Weather Station Direction (Degrees) Max Wind Gusts (km/h) Temp (°C) Cause Sub-Cause Description Customers Impacted Duration (Hours) Valley 12/3/2025 5:09 Greenwood d 20 31 31 1 Tree Contacts Falling Trees...

AI summary The document presents a table detailing several power outages in Nova Scotia on December 3, 2025, caused primarily by heavy snow accumulation leading to falling trees contacting power lines, and one instance of equipment failure due to strong winds. Each entry includes the zone, time, weather station, wind conditions, temperature, cause, sub-cause, description, number of customers impacted, and duration of the outage.

Customers Restored within X hours of Storm Onset Valley % Within 6 Hrs 19.40% Within 12 Hrs 77.38% Within 24 Hrs 95.56% Within 48 Hrs 100.00% This table represents the percentage of customers restored within 6, 12, 24, or 48 hours of the s...

AI summary The table shows the percentage of customers in Valley restored within specific timeframes after a storm, with 95.56% restored within 24 hours and 100% within 48 hours. The average restoration time was 14.47 hours.

Outage Summary: Customers Impacted: 4,359 Customer hours of interruption: 6,883 Full Restoration\ : 32.2 Hours

AI summary An outage impacted 4,359 customers, resulting in 6,883 customer hours of interruption. Full restoration was achieved after 32.2 hours.

SECTION 5: COMPARISON TO SIMILAR OUTAGE EVENTS - The December 3, 2025 weather event was similar to other heavy snow accumulation events experienced in the province. - As with past storms (such as December 13, 2022) involving heavy, wet sno...

AI summary This section compares the December 3, 2025 weather event to previous heavy snow events, noting that similar outage patterns occurred due to tree contact with power lines. Heavy snow accumulation and light winds contributed to outages and restoration delays.

- In both December 3, 2025 and December 13, 2022 events, only a few regions experienced significant impacts, while the remaining regions saw minimal disruption. Event December 3, December 13, 2025 2022 Customers Interrupted 56,114 48,944 C...

AI summary Two significant weather events occurred on December 3, 2025, and December 13, 2022, causing power outages in Nova Scotia. While only a few regions experienced significant impacts, the majority saw minimal disruption. The number of customers interrupted and the hours of interruption varied between the two events.

Storm Outage Analysis Report December 3, 2025 IR-01 Confidential Attachment 1 has been filed electronically. 1 Request IR-1: 82V-423 rural 2021 2.71 83V-303 rural 2025 3.05 84S-302 rural 2019 1.79 85S-401 rural 2025 2.57 87H-313 rural 2023...

AI summary The document includes a Storm Outage Analysis Report and Request IR-1 with a table of data, followed by Request IR-3 asking for a comprehensive summary of vegetation management performance over the past five years, including an analysis of maintenance practices and outage patterns.

NON-CONFIDENTIAL 1 Request IR-4: 29 (c) As part of the ESRP, NS Power conducted storm planning calls leading up to and during 30 the weather events. NS Power had crews staged across the four operating regions of the 1 province (West, Metro...

AI summary NS Power conducted storm planning calls and staged crews across four regions in preparation for weather events. They achieved performance standards metrics, restoring 100% of customers within 48 hours. The response also outlines pre-emptive actions taken based on different storm scenarios, including low, expected, and high cases.

(b) Of the 56,114 customer interruptions experienced over the December 3 Major Event Day, a breakdown of the customers that experienced outages lasting more than 24 hours is below: Region Customer Count of 24hr+ Outages Cape Breton 182 Met...

AI summary The document provides a breakdown of customer outages lasting more than 24 hours during the December 3 Major Event Day and requests an evaluation of field resource utilization during the event, including crew deployment, time intervals between outage detection and dispatch, and productivity indicators.

multiple outage locations within a given area simultaneously or provided with grouped assignments to support situational awareness, travel planning, and safe access, rather than being dispatched on a strictly one‑outage‑at‑a‑time basis. As...

AI summary NS Power does not track outage restoration metrics on a per-crew-hour basis during storm events due to the complexity and variability of outages. Crews are assigned grouped tasks across geographic areas, making individual productivity metrics unreliable. Detection-to-dispatch timing is also not consistently recorded during large-scale outages.