Topic:"Infrastructure Planning" in M12784

1 Figure 28 - SAIDI Improvement Projection ................................................................................. 51 2 Figure 29 - Annual Tree Contact Outage Hours ...................................................................

AI summary The text lists figures related to infrastructure reliability, vegetation management, and outage reduction efforts, including SAIDI projections, tree contact outages, equipment failures, and emergency response planning along specific routes.

............................................................................ 67 16 Figure 46 - Wreck Cove Bring-to-Roadside Project..................................................................... 70 17 Figure 47 - Pleasant Bay Road Wi...

AI summary The text lists infrastructure projects and reliability investments for Nova Scotia Power, including road widening, tree trimming, and feeder performance improvements on specific power lines (e.g., 57W-402, 91W-411). It highlights efforts to enhance grid reliability, reduce outages, and track CKAIFI contributions over time.

1 1.0 INTRODUCTION – NOVA SCOTIA POWER’S COMMITMENT TO 2 RELIABILITY 3 4 At Nova Scotia Power, our team is focused on providing safe and reliable electricity to Nova 5 Scotians when and where they need it. Across the province each day, mor...

AI summary Nova Scotia Power (NSP) outlines its commitment to reliability through the $1.3 billion Five-Year Reliability Plan (2025–2029), aiming to reduce outage frequency and duration while maintaining affordable rates. Key initiatives include vegetation management, equipment upgrades for extreme weather resilience, and grid modernization. Progress in 2025 included $206 million in grid improvements.

1 • Targeted reliability work on 46 priority feeders across the province was completed in 2 2025 for targeted equipment replacements, protection upgrades, load growth upgrades, 3 building to roadside and tree trimming. 4 5 • Out of the 405...

AI summary NS Power completed targeted reliability work on 46 feeders in 2025, achieving outage reduction targets and meeting adverse weather performance standards. Community engagement efforts and infrastructure upgrades like storm-hardened systems were highlighted as key initiatives to improve reliability and customer experience.

plementation of installing larger, stronger poles and storm-hardened 27 system upgrades, such as coastal framing and clamp top insulators, to increase the 28 resiliency of the system. DATE FILED: March 31, 2026 Page 10 of 115 2025 Annual P...

AI summary The document outlines infrastructure upgrades to enhance grid resilience, including storm-hardened poles, coastal framing, and clamp top insulators. It also details 2025 upgrades to substations and protective devices with remote control and telemetry, aiming to reduce outage durations through grid modernization.

f 115 2025 Annual Performance Standards Report Non-Confidential 1 Figure 2 - Improvement in Outage Duration (SAIDI) Performance Standards SAIDI 6.00 5.00 4.00 SAIDI 3.00 2.00 1.00 0.00 2021 2022 2023 2024 2025 Year 2 3 Figure 2 shows the a...

AI summary The 2025 Annual Performance Standards Report highlights a reduction in SAIDI (System Average Interruption Duration Index) from 5.23 to 4.79 hours between 2021 and 2025, with expected further improvements from the Five-Year Reliability Plan investments.

cable target are set out in Appendix O. NS Power 8 is required to complete various new service installations within a certain number of days 9 following completion of all customer prerequisites. 10 Like reliability metrics such as SAIDI an...

AI summary NS Power met 2025 new service connection time targets for five installation types, excluding MEDs and EEDs. Benchmarks are based on 2020–2024 historical data, with SAIDI/SAIFI reliability metrics referenced. Performance results are detailed in Figures 11 and 12.

2025 Target 3.0 4.9 3.2 6.2 13.7 2025 Result 2.64 4.15 2.30 5.11 4.78 Variance -0.36 -0.75 -0.9 -1.09 -8.92 5 6 Figure 12 shows that NS Power met all New Service Connection Times targets. 7 8 The monthly average details for the individual...

AI summary NS Power met all New Service Connection Times targets in 2025, with the Energy Delivery Scheduling team prioritizing work orders based on safety, commitments, and service standards. Appendix D details monthly performance metrics.

25 SAIFI Result 2.5 2025 Performance Standards SAIFI 2 2.05 1.5 1.57 1.36 SAIFI 1.26 1.13 1.17 1 0.96 0.85 0.73 0.5 0.58 0.42 0.33 0.17 0 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2025 Threshold 2 3 Figure 26 shows the monthly progre...

AI summary NS Power achieved the best SAIFI result since 2012 in 2025, with SAIFI staying below target and reliability improving. SAIDI slightly exceeded target in December but showed year-over-year improvement aligned with the Five-Year Reliability Plan.

tomer Support Roadshow - Inverness December-25 Elected Official Meeting June-25 Customer Support Roadshow - Pictou December-25 Elected Official Meeting 1 2 NS Power is committed to meeting and listening to customers and stakeholders as the...

AI summary NS Power emphasizes customer engagement through roadshows and meetings, aligning with the Five-Year Reliability Plan and 2026 ACE Plan. Climate change impacts, including 93 hours of 80+ km/h winds in 2025, are addressed through infrastructure resilience improvements and updated pole standards, reducing storm-related disruptions.

Page 56 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Vegetation Management 2 As outlined in NS Power’s Five-Year Reliability Plan Update, an additional $45 million in 3 distribution and transmission tree trimming and...

AI summary NS Power plans to invest $45 million in 2026 for vegetation management, targeting tree contact as the leading cause of outages. The plan includes trimming, right-of-way widening, and new corridor establishment to improve infrastructure reliability.

e feeder. 4 Had this outage occurred in winter, in a less accessible off-road location, restoration time would 5 have likely been a minimum of four hours. 6 Extreme Weather Conditions 7 The area fed by 85S-401 is rugged and exposed, runnin...

AI summary The text discusses the challenges faced by NS Power in restoring power on feeder 85S-401 due to extreme weather conditions in the Cape Breton Highlands, including harsh winter conditions, inaccessible locations, and heavy snowfall, which could significantly delay restoration times.

2025 Annual Performance Standards Report Non-Confidential 1 Figure 38 – Emergency Huts between North and French Mountain along 85S-401 2 3 DATE FILED: March 31, 2026 Page 64 of 115 2025 Annual Performance Standards Report Non-Confidential...

AI summary Nova Scotia Power (NSP) has invested $10 million since 2012 to improve reliability on feeder 85S-401, serving 2,266 customers. CKAIDI (Circuit Average Interruption Duration Index) metrics show a 56% improvement in outage duration between 2018-2022 and 2024-2025, demonstrating progress despite challenging winter conditions and terrain.

nce Improvement 2018-2022 Avg 2024-2025 Avg Percent Improvement CKAIDI 45.44 19.96 56.07 11 12 Figure 41 compares the average feeder performance for CKAIDI between 2018 and 2022 against 13 2024 and 2025. There is significant improvement in...

AI summary The document highlights a 56% reduction in CKAIDI (Circuit Average Interruption Duration Index) for feeder 85S-401 between 2018-2022 and 2024-2025, attributed to reliability investments and vegetation management. NS Power invested over $10M in reliability projects since 2012, with $483K spent on tree trimming in 2025 to reduce outages. Challenges remain due to terrain complexity and off-right-of-way tree risks.

ntelligence and automation logic. This enables the devices to detect 17 faults, isolate affected segments, and restore service to unaffected areas with minimal 18 human intervention. 19 NS Power believes these grid modernization investment...

AI summary NS Power proposes grid modernization investments on feeder 85S-401, including FLISR devices to automate fault detection and restoration, reducing outage durations and manual patrols. They also plan Bring-to-Roadside projects to improve infrastructure accessibility and reliability in remote areas, with $1.5M allocated for FLISR implementation by 2026.

lt location, safer and more efficient 8 restoration activities, and improved overall reliability for customers served by remote portions 9 of the feeder. 10 Wreck Cove Bring-To-Roadside 11 The Wreck Cove Bring-to-Roadside project involves...

AI summary The document outlines two infrastructure projects by Nova Scotia Power (NSP): the Wreck Cove Bring-to-Roadside project, which relocates distribution lines to improve reliability and safety for remote customers, and the Pleasant Bay Road Widening project, which coordinates with Parks Canada to relocate infrastructure during road expansion. Both aim to enhance grid efficiency and reliability.

arch 31, 2026 Page 70 of 115 2025 Annual Performance Standards Report Non-Confidential 1 roadside configuration. The work includes the installation of 26 poles and 850 meters of 2 primary and neutral conductors, resulting in the relocation...

AI summary The 2025 Annual Performance Standards Report details infrastructure upgrades near Pleasant Bay, including installation of 26 poles and 850 meters of conductors to realign power lines with a road widening project. The work is part of reliability investments outlined in Figure 45.

Page 71 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Figure 45 - 85S-401 Reliability Investments

AI summary The 2025 Annual Performance Standards Report includes Figure 45, titled '85S-401 Reliability Investments,' which likely details infrastructure or system reliability initiatives under Nova Scotia's regulatory framework. The document focuses on performance metrics related to grid reliability and investment planning.

Year Project Description Investment Status Cape Smokey 2019 Bring-to- 2.9 km BTR $794,000 Completed Roadside Ingonish Center 2020 Bring-to- 0.9 km BTR $35,197 Completed Roadside L-6549 Transmission 2020 Upgrades to $2,189,000 Completed Lin...

AI summary The document outlines completed and ongoing infrastructure projects by Nova Scotia Power, including transmission line upgrades, vegetation management, and equipment replacements between 2019 and 2026, with investments ranging from $35,197 to $2,189,000.

Bring-to- 400m of three $193,521 On-going Roadside phase line Targeted Vegetation Vegetation 2025 $483,869 Completed Management Management – 96 Spans Relocating Pleasant Bay 2026 850m of single $251,198 Planned Widening phase line Approxim...

AI summary The text lists infrastructure projects for 2025 and 2026, including vegetation management, line widening, and FLISR implementation, with associated costs and statuses. Projects range from completed to planned, totaling $6.28 million.

the province 4 terminating at the 3W Substation on the south side of Lake Rossignol. Several distribution 5 substations are supplied by L-5532, including sources for feeders 57W-402 and 91W-411. 6 When an outage occurs on L-5532, customers...

AI summary NS Power plans two 2026 projects on L-5532 transmission line and 91W substation to improve reliability, with total costs of $5.5M. Projects aim to replace aging assets, enhance protection systems, and reduce outage impacts. Prior investments included $530k upgrades (2024-2025) and $4M vegetation management on L-5532.

Page 73 of 115 2025 Annual Performance Standards Report Non-Confidential 1 NS Power recognizes that improving the performance of L-5532 is essential to providing reliable 2 service to customers supplied by this transmission line. By replac...

AI summary NS Power highlights infrastructure upgrades on L-5532 to reduce equipment failures and improve reliability. The Caledonia Feeder 57W-402 showed improved outage frequency but missed targets, requiring further work. The feeder serves 336 rural customers and experienced 19 outages in 2025, including events on Major/Extreme Event days.

vents in 2025, three of which occurred on Major or 20 Extreme Event days. Four events were Planned Outages. Of the remaining 12 events, four outages 21 events impacted all customers on the feeder. 22 The details of the 19 outages are as fo...

AI summary The 2025 Annual Performance Standards Report details 19 outages, including 3 on Major/Extreme Event days, 4 Planned Outages, and 12 impacting varying numbers of customers. Four full feeder outages are described, caused by tree contact, vehicle accidents, and lightning, with durations ranging from 2.5 minutes to 4.79 hours.

lenge this poses for anticipating and mitigating them in advance. 8 9 Figure 46 - 57W-402 CKAIFI Contribution by Year 57W-402 CKAIFI Contribution by Year 2020 4.00 1.78 2021 2.00 2022 2.00 2023 7.98 2024 5.00 2025 1.00 3.00 0 1 2 3 4 5 6 7...

AI summary The text highlights that Loss of Supply outages account for 84% of CKAIFI (Circuit Average Interruption Frequency Index) for the 57W-402 feeder over six years. It notes improvements in CKAIFI over three years but emphasizes that a Motor Vehicle Accident in 2025 caused the feeder to exceed the threshold. The Distribution Reliability Investment Plan for 57W-402 is referenced.

-402 can be found in Figure 48. Similarly, 5 the Reliability Investment Plan for L-5532 can be found in the section above. 6 7 Figure 48 - 57W-402 Distribution Reliability Investment Plan Year Project Description Investment Status Targeted...

AI summary The document outlines targeted reliability investments for Feeder 57W-402, including vegetation management projects and transmission upgrades on L-5532. NS Power highlights ongoing efforts to maintain feeder reliability through focused tree trimming and equipment replacement, with over $10 million invested in recent years. Transmission improvements are expected to significantly reduce outages for customers.

al $5.5 million in on-going and planned projects. These 18 transmission actions are expected to have the greatest impact on overall outage performance for 19 customers served by this feeder. 20 DATE FILED: March 31, 2026 Page 77 of 115 202...

AI summary The 2025 Annual Performance Standards Report highlights improvements in outage performance for the Middlefield Feeder 91W-411, including a 34% reduction in outage frequency since 2024. The feeder serves 1,268 rural customers and achieved a CKAIFI of 4.71, above the threshold of <4.21, despite ongoing infrastructure challenges.

d has multiple branch lines off the main roads. It is extremely rural serving many 12 cottages and remote homes. 13 The 91W Middlefield substation is served by the 69 kV transmission line L-5532. 14 Feeder 91W-411 experienced 83 outage eve...

AI summary The 91W Middlefield substation, serving a rural area with remote homes, experienced 83 outages in 2025, including 19 on Major/Extreme Event days. 4 outages affected all customers, while others were due to planned events, foreign interference, customer-owned equipment, and vegetation management. NS Power collaborated with customers on equipment-related issues.

Page 82 of 115 2025 Annual Performance Standards Report Non-Confidential 1 and proactive reliability investments in upgrades to larger, stronger poles, and protective 2 equipment additions. 3 4 91W-411 Investment and Reliability Action Pla...

AI summary NS Power's 2025 report details $2.75M in reliability upgrades for feeder 91W-411, including vegetation management reducing tree-related CKAIFI by 38% (from 1.11 to 0.69). Investments include pole replacements, TripSavers, and a 2026 3-phase line upgrade. Performance shows improved outage reduction through targeted infrastructure work.

e upgrading of 5.3 km of 23 single phase line to 3-phase will begin execution in early 2026. 24 NS Power’s recent distribution reliability investments for 91W-411 can be found in Figure 53. 25 DATE FILED: March 31, 2026 Page 83 of 115 2025...

AI summary The document outlines NS Power's plan to upgrade 5.3 km of single-phase power lines to 3-phase by early 2026 and references Figure 53, which details distribution reliability investments for 91W-411. The text is part of the 2025 Annual Performance Standards Report filed on March 31, 2026.

age 83 of 115 2025 Annual Performance Standards Report Non-Confidential 1 Figure 53 – 91W-411 Distribution Reliability Investments

AI summary The 2025 Annual Performance Standards Report includes Figure 53, which details distribution reliability investments under the 91W-411 project. This highlights NS Power's efforts to improve grid reliability through infrastructure upgrades.

Year Project Description Investment Status Targeted Vegetation Vegetation 2021 $558,576 Completed Management Management - 431 Spans Targeted Vegetation Vegetation 2022 $248,844 Completed Management Management – 178 Spans Targeted Vegetatio...

AI summary The document outlines completed and ongoing vegetation management projects (2021-2024) and infrastructure upgrades (2025-2026) by NS Power, including targeted spans and investments, with the Labelle Road extension involving 5.3 km of phase line upgrades.

along Extension Labelle Road Equipment Install two 2025 $41,240 Completed Installation TripSavers Targeted Pole 2025 Equipment $74,764 Completed Replacements Replacements Targeted Insulator 2026 Equipment $21,000 Planned Replacements Repla...

AI summary The document outlines infrastructure projects by NSP, including equipment installations and vegetation management, with investments totaling $2.75 million since 2021. Projects like TripSavers installation and pole replacements are completed or planned, while vegetation management spans 150 areas. The 2025 Annual Performance Standards Report includes Section 4.0 on customer-level reliability data.

east 30 30 West 36 36 Cape Breton 2 28 Metro 22 32 Forestry Workers Northeast 26 32 West 34 40 Cape Breton 3 3 Metro 0 0 Transmission Line PLTs & Operators Northeast 3 3 West 3 3 Total 381 429 2 DATE FILED: March 31, 2026 Page 105 of 115 2...

AI summary The document outlines Section 6.0 of the 2025 Annual Performance Standards Report, focusing on planned outages by NS Power. It includes a table showing workforce and PLT (Planning and Logistics Team) numbers across regions, though specific outage details are not provided in the excerpt.

Page 105 of 115 2025 Annual Performance Standards Report Non-Confidential 1 6.0 PLANNED OUTAGES ON NS POWER’S SYSTEM 2 With respect to planned outages, the NSUARB directed the following in its 2017 Annual 3 Performance Standards Report dec...

AI summary NS Power discusses planned outages required for reliability work, noting the NSUARB's 2017 directive for annual reporting on outage reductions. The report emphasizes minimizing customer impact through load transfer and energized work where safe, while acknowledging the necessity of planned outages for reliability upgrades.

on track through the first four months of the year but 24 ultimately missed the target because of the cyber incident. However, NS Power met the other 25 customer service targets. In fact, NS Power significantly exceeded the targets for all...

AI summary NS Power met most customer service targets in 2025 but missed one due to a cyber incident. The Board may impose penalties or require compliance plans under the Public Utilities Act. NS Power's Five-Year Reliability Plan aims to improve reliability through grid modernization and vegetation management, though full benefits will take time.

Appendix D New Service Connection Times 2025 Supporting Data Average Number of Business Days (by Service Installation Type) No Pole Pole or Temporary to Line Line Transformer Permanent Extension Extension Month <10 Poles ≥10 Poles January...

AI summary Appendix D presents 2025 data on average business days for new service connection installations, categorized by type (e.g., 'No Pole', 'Pole or Temporary to Line', 'Line Extension'). Results for 2025 show performance against targets, with most categories meeting or slightly exceeding targets, except for '≥10 Poles' line extensions (4.78 vs. 13.7 target).

l customer hours (duration) of the device. The “customer hours” is calculated by multiplying the number of customers impacted by an event with the total hours (duration) of the outage. • Reliability projects are displayed as hatched rectan...

AI summary The text defines 'customer hours' as the product of impacted customers and outage duration, used in reliability metrics. It references reliability and vegetation management projects visualized in diagrams, and cites the 2025 Performance Standards Report Appendix J with matter number 85S-411.

85S-401.aprx Last revised by: Katie Chute Date revised: March 25th, 2026 2025 Performance Standards Report Appendix J Page 3 of 6 57W-402 INVESTMENT MAP The following map shows the feeder extents of 57W-402, a 25-kV circuit feeding 336 cus...

AI summary The document presents a map of the 57W-402 25-kV circuit feeding 336 customers from the Caledonia substation, overlaying 2025 outage events with reliability investment locations. Outages are visualized via circles scaled by customer impact, with call-out boxes showing total customer hours per event.

l customer hours (duration) of the device. The “customer hours” is calculated by multiplying the number of customers impacted by an event with the total hours (duration) of the outage. • Reliability projects are displayed as hatched rectan...

AI summary The text discusses reliability metrics including customer hours of interruption (CHI) and service point events, referencing a 2025 Performance Standards Report. It details infrastructure data for the 57W-402 feeder and substation, highlighting customer impact and outage duration calculations.

Work Depot: LIV 57W-402_2026.MXD Last revised by: Katie Chute Date revised: March 25th, 2026 2025 Performance Standards Report Appendix J Page 5 of 6 91W-411 INVESTMENT MAP The following map shows the feeder extents of 91W-411, a 25-kV cir...

AI summary The document presents a map of the 91W-411 circuit's 2025 outage events and reliability investments, visualizing customer impact through circle sizes and durations, alongside hatched rectangles for reliability projects and colored rectangles for vegetation management initiatives.

pact 2.34 - 2.59 2.59 - 3.27 3.27 - 4.93 4.93 - 20.20 2026 Insulator Replacements Vegetation Management 2022 - 2024 2919.62 10241.14 This drawing provides reference to Nova Scotia Power Inc. equipment,for the purpose of performing services...

AI summary The text outlines 2026 insulator replacement projects and 2022-2024 vegetation management initiatives with associated costs ($2,919.62 and $10,241.14). It references Nova Scotia Power Inc. equipment and includes a safety disclaimer about potential discrepancies between the drawing and actual power system configurations.

1,214.84 3,630 Switching 6/3/2025 88W-314 01:23 04:49 206 15,350.44 4,476 Planned Transmission 6/3/2025 101H-411 08:59 15:55 416 1,579.36 228 Capital 6/3/2025 46W-301 09:16 17:27 491 8.18 1 Reliability 6/3/2025 62H-304 10:02 11:15 72 3,031...

AI summary A table listing multiple entries with dates, matter numbers, time intervals, and costs categorized under 'Switching,' 'Planned Transmission,' 'Capital,' 'Reliability,' and other terms, likely related to infrastructure planning and capital expenditures in a regulatory proceeding.

15 Reliability 6/6/2025 113H-431 10:25 11:00 35 4.09 7 Reliability 6/6/2025 54H-304 10:59 11:29 30 5.51 11 Reliability 6/6/2025 62H-304 11:23 14:02 159 2.65 1 Reliability 6/6/2025 62H-304 13:59 14:43 43 0.72 1 Reliability 6/8/2025 102W-311...

AI summary The text presents a table of incident data with dates, identifiers, durations, and categories such as 'Reliability,' 'Switching,' 'Planned Transmission,' 'Capital,' and 'R.' The data appears to track events with associated metrics but lacks narrative context or discussion of themes beyond the raw figures.

139 13.88 6 Reliability 6/9/2025 99H-311 12:30 17:30 301 170.41 34 Reliability 6/9/2025 40H-304 13:53 14:34 41 7.52 11 Reliability 6/9/2025 40H-302 13:55 14:06 10 2.25 13 Reliability 6/9/2025 56N-414 15:12 16:30 78 2.59 2 Capital 6/10/2025...

AI summary The text presents a table with dates, event codes, timestamps, numerical values, and categories such as 'Reliability' and 'Capital' from the 2025 Performance Standards Report Appendix K. No explicit arguments or discussions are present, only data points.

bility 7/24/2025 22V-322 08:50 11:04 134 53.74 24 Reliability 7/24/2025 79V-402 10:04 11:17 73 102.20 84 Switching 7/24/2025 101H-412 13:24 13:52 28 5.16 11 Customer Requested 7/25/2025 104H-441 08:09 15:21 433 137.05 19 Reliability 7/25/2...

AI summary The text presents a table of interruption events with dates, durations, and classifications (e.g., Reliability, Switching, Planned Transmission). It includes metrics such as customer hours of interruption, event durations, and categories indicating causes (e.g., reliability issues, planned transmission work).

2,164 Planned Transmission 7/31/2025 126H-313 23:54 04:37 282 8,586.77 1,826 Planned Transmission 7/31/2025 126H-311 23:54 04:37 282 7,578.95 1,611 Planned Transmission 8/3/2025 62N-414 13:44 14:45 62 7.18 7 Reliability 8/4/2025 13V-303 09...

AI summary The text presents a table of outage events with dates, durations, costs, and categories such as 'Planned Transmission,' 'Reliability,' and 'Capital.' It highlights infrastructure planning, reliability management, and capital expenditures related to power system operations in Nova Scotia.

Planned Transmission 8/25/2025 55V-322 23:04 23:35 31 704.84 1,362 Planned Transmission 8/25/2025 55V-323 23:05 23:36 31 610.72 1,179 Planned Transmission 8/26/2025 73W-411 08:45 13:14 269 17.94 4 Reliability 8/26/2025 59C-402 10:15 11:50...

AI summary A log of events with dates, durations, and categories such as 'Planned Transmission,' 'Reliability,' 'Switching,' and 'Capital,' including metrics like duration, quantity, and cost. Entries detail operational activities and infrastructure-related events.

Reliability 9/29/2025 111S-312 09:46 12:28 162 56.64 21 Reliability 9/29/2025 50W-412 10:53 11:40 48 141.30 178 Reliability 9/29/2025 124H-301 15:41 17:53 1,572 471.56 18 Switching 9/30/2025 4C-430 03:00 08:06 305 9,321.85 2,513 Reliabilit...

AI summary The text presents a table of event records from October 2025, categorizing incidents by type (e.g., Reliability, Switching, Tree Trimming) with timestamps, durations, and associated metrics. Key themes include reliability performance, infrastructure-related events, and planned transmission activities.

05:45 07:16 91 473.26 313 Planned Transmission 10/2/2025 14V-303 05:45 06:42 57 11.35 12 Planned Transmission 10/2/2025 96H-411 08:14 11:46 212 14.14 4 Capital 10/2/2025 101H-413 09:00 15:10 370 641.25 104 Reliability 10/2/2025 131H-423 10...

AI summary The text lists outage events with timestamps, durations, costs, and categories (e.g., 'Planned Transmission,' 'Reliability,' 'Tree Trimming'). Entries include dates (10/2/2025–10/4/2025), event identifiers (e.g., 14V-303), durations (57–720 minutes), costs (e.g., $1,307.35), and classifications (e.g., 'Customer Requested').

/10/2025 13V-303 18:27 19:17 50 206.67 249 Switching 11/12/2025 91W-411 04:06 11:17 431 301.89 42 Reliability 11/12/2025 91W-411 04:06 11:41 456 22.78 3 Reliability 11/12/2025 1W-411 08:41 16:22 461 61.43 8 Tree Trimming 11/12/2025 57C-422...

AI summary A table listing events with dates, times, durations, and categories such as 'Reliability,' 'Capital,' and 'Tree Trimming.' The data highlights interruptions, expenditures, and operational activities related to Nova Scotia Power's grid management and infrastructure.

eted device 28 replacements reducing equipment failure, as well as the use of protective devices to limit 29 the overall number of customers impacted by outages should they occur. 30 Date Filed: May 29, 2026 NSPI (IG) IR-2 Page 1 of 2 2025...

AI summary NSPI outlines strategies to reduce outages, such as equipment replacement and infrastructure improvements, which positively impact SAIDI and CKAIDI metrics. However, external factors like weather, regulatory processes, and customer cooperation may delay implementation of these initiatives.

anagement plan laid 20 out in the Five-Year Reliability Plan will provide ongoing cumulative benefits as more 21 corridors are widened and higher risk trees are trimmed and managed. Date Filed: May 29, 2026 NSPI (IG) IR-4 Page 2 of 2 2025...

AI summary NSPI outlines that the Five-Year Reliability Plan's management strategies, including corridor widening and tree trimming, will deliver cumulative reliability benefits. The text references NSPI's responses to an industrial group information request and cites the 2025 Annual Performance Standards Report (NSEB M12784).

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Industrial Group Information Requests NON-CONFIDENTIAL 1 Request IR-5: 2 3 Reference: Page 52, Figure 30. 4 5 Reference: 2026 ACE Plan (M12619), N-6, NSPI (NSEB) RIR-...

AI summary NSPI responds to industrial group requests regarding data discrepancies in outage metrics, explaining reductions in outage events and increased customer outage hours. The response attributes 2025 outage reductions to targeted investments and reliability improvements, while noting the need to differentiate weather impacts from infrastructure upgrades.

and targeted reliability improvements. In addition, this feeder was impacted by loss- 30 of-supply events from the L-5532 transmission line; planned investments on L- Date Filed: May 29, 2026 NSPI (IG) IR-6 Page 1 of 2 2025 Annual Performa...

AI summary NSPI outlines planned infrastructure investments on transmission lines (L-5532) and feeders (57W-402, 91W-411) to reduce outages through vegetation management, equipment upgrades, and system improvements. These efforts aim to enhance reliability by addressing root causes of loss-of-supply events.

ts. The Company relies on: 25 • Year-over-year outage cause comparisons 26 • Circuit-level risk rating (leading and lagging indicators of condition) 27 • Qualitative assessment of directional consistency between 28 investment programs and...

AI summary NSPI explains that reliability performance is influenced by complex variables like weather and multi-year investment planning. It emphasizes a risk-based asset management framework over statistical models to avoid misleading correlations, citing NSEB M12784 as the referenced proceeding.

1 Request IR-7: 2 3 Page 9 of the report notes the following: 4 5 NS Power is already seeing positive results from the $206 million 6 invested in the first year of the reliability plan. There was a 19 percent 7 reduction in outages due to...

AI summary NS Power reports a 19% reduction in tree-related outages and 18% reduction in equipment failure outages since 2021, attributing improvements to the reliability plan's $206 million investment. The request seeks detailed data on distribution lines, outages, vegetation management, and reliability projects across four regions.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 (d) As of 2025, the table below shows percentages of distribution line by region not requiring 2 vege...

AI summary NSPI's 2025 Annual Performance Standards Report responds to NSEB information requests, detailing regional percentages of distribution lines not requiring vegetation management and referencing attachments for further data. It clarifies that no overhead feeders are fully free of vegetation management requirements and cites external reports for customer satisfaction metrics on power restoration.

73 65 Provincial 83 74 66 72 72 15 16 Business Customer Satisfaction: Ability to Restore Power Quickly Region 2021 2022 2023 2024 2025 West 88 83 81 84 83 Metro 78 75 71 76 80 Northeast 88 84 74 75 81 Cape Breton 85 82 70 74 72 Provincial...

AI summary The text presents tables showing provincial and regional business customer satisfaction metrics for power restoration speed (2021-2025) and distribution line lengths by voltage class (2025). Data highlights regional performance variations and infrastructure metrics, part of a 2025 Annual Performance Standards Report submitted to the Nova Scotia Energy Board (NSEB).

236 6,896 1,255 8,388 Metro 35 2,209 3,431 5,674 Grand Total 784 15,431 12,181 28,396 Total Distribution Line Length (Km) Year Cape Breto Metro Northeast West Province 2020 5,552 5,413 8,408 8,185 27,558 2021 5,584 5,671 8,499 8,185 27,939...

AI summary The text presents statistical tables showing distribution line lengths (in kilometers) and outage counts by region (Cape Breton, Metro, Northeast, West) and year (2020–2025) across Nova Scotia. Data highlights trends in infrastructure expansion and system reliability over time.

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to NSEB Information Requests NON-CONFIDENTIAL 1 Request IR-13: 2 3 Page 10 of the report notes that the targeted reliability work on 46 priority feeders across 4 the pro...

AI summary The NSEB requested details on NSPI's 2025 investments in 46 priority feeders, including investment breakdowns, selection criteria, and performance metrics. NSPI directed responses to an attachment and another proceeding, citing asset management and metrics like CKAIDI and CKAIFI to evaluate effectiveness.

ppropriate mitigating strategy (for example, vegetation 19 management or device replacement) should be made in consideration of the outage cause. 20 Using ROW widening to mitigating deteriorating poles will not address the outage risk 21 p...

AI summary The text emphasizes the importance of understanding outage causes and using leading/lagging indicators for risk-based decisions. It critiques ineffective mitigation strategies like ROW widening and new insulators, arguing they fail to address root risks from asset failures or tree contact.

NON-CONFIDENTIAL 1 Request IR-30: 2 3 Page 56 of the report, Figure 32 4 5 (a) Please extend Figure 32 to also include the same data for 2016-2025. 6 7 Response IR-30: 8 9 (a) Hours >=80 Storm Major Event Extreme Event Total Storm Year km/...

AI summary The response to Request IR-30 provides updated data on wind gust hours and storm days from 2016 to 2025, including a correction for 2025 data after recovering information from a missing weather station. The data highlights trends in storm-related events and their impact on the power system.

tripped the breaker, including the distribution transformer on the bus, causing 85S-401 to 23 experience an outage. 24 25 (b) A design change was implemented to prevent reoccurrence. Date Filed: May 29, 2026 NSPI (NSEB) IR-31 Page 1 of 1 2...

AI summary An outage on circuit 85S-401 occurred due to a tripped breaker and distribution transformer failure. A design change was implemented to prevent recurrence. The text references NSPI's responses to NSEB information requests in the 2025 Annual Performance Standards Report (NSEB M12784).

2025 Annual Performance Standards Report (NSEB M12784) NSPI Responses to Nova Scotia Energy Board Information Requests NON-CONFIDENTIAL 1 Request IR-32: 2 3 The report indicates Wreck Cove Feeder 85S-401 serves approximately 2,266 customer...

AI summary The Nova Scotia Energy Board (NSEB) requests NSPI to explain plans for remaining off-road distribution lines, cost implications for reliability investments, outage data, and impacts on CKAIDI/CKAIFI metrics related to the Wreck Cove Feeder 85S-401 in its 2025 Annual Performance Standards Report (NSEB M12784).

1 Response IR-32: 2 3 (a) At this time, NS Power is not necessarily planning to relocate all remaining off-road 4 sections of feeder 85S-401 to roadside. Following completion of the 2025 Wreck Cove 5 Bring-to-Roadside project and the plann...

AI summary NS Power explains that not all off-road sections of feeder 85S-401 will be relocated to roadside due to federal jurisdiction over parts in Cape Breton Highlands National Park and challenging terrain. Reliability improvements will focus on vegetation management, equipment upgrades, and grid modernization like FLISR, with selective bring-to-roadside work in high-impact areas.

e work is advanced 25 selectively in the highest-impact and most practical locations. 26 27 NS Power will continue to assess the remaining off-road sections through inspections, 28 engineering studies, and outage analysis, and will advance...

AI summary NS Power plans to advance infrastructure projects in high-impact locations, using inspections and engineering studies to assess remaining off-road sections. Projects must meet reliability, feasibility, and cost-effectiveness criteria through the Annual Capital Expenditure Plan process, as outlined in NSPI's response to the Nova Scotia Energy Board.

hic 25 location of the underlying fault. While field crews determine the fault location during 26 restoration, this information is not consistently captured with sufficient geographic 27 precision to distinguish whether the fault occurred...

AI summary The text highlights inconsistencies in capturing fault location data during restoration, noting that geographic precision is insufficient to distinguish on-road vs. off-road feeder faults. It references NSPI's responses to NSEB information requests and the 2025 Annual Performance Standards Report (NSEB M12784).

and are therefore not attributable to off-road distribution sections. 25 Excluding these events, off-road sections are more likely to influence CKAIDI through 26 increased restoration time requirements, although this impact cannot be preci...

AI summary NSPI explains that outage events are recorded at the protective device level, not precise geographic locations, limiting attribution to specific feeder segments. NSPI concludes no 2025 outages originated from sections brought to roadside, referencing projects like Cape Smokey and Wreck Cove. The text discusses impacts on CKAIDI and CKAIFI metrics due to restoration times and outage occurrences.

(b) What is the reason for exceeding the thresholds for the Line Extension ≥ 10 Poles during the months of November and December? How does NS Power intend to address this issue going forward?

AI summary The question asks for the reason behind exceeding the Line Extension ≥ 10 Poles thresholds in November and December and how NS Power plans to address the issue. It focuses on infrastructure planning and regulatory compliance.

(c) Were there any major or extreme weather events during November 2025 that would explain why, in that particular month, NS Power failed to meet 4 of the 5 New Service 1 Connection thresholds? If not, what was the reason for the departure...

AI summary The text discusses NS Power's failure to meet service standards in November 2025, asking if extreme weather events were the cause. It also includes a table with customer distribution data and a request for additional reliability improvement plans for the Wreck Cove area.

(e) All planned investments for feeder 85S-401 are documented in Section 3.4 and Figure 45 of the 2025 Performance Standards report. 1 Request IR-5: 2 3 Refer to the 2025 PSR Report, Section 4.0 Customer-Level Reliability Data, Figure 55:...

AI summary The improvement in customer-level reliability metrics (CEMI-4 and CEMI-5) in 2025 is attributed to reduced system-wide outage frequency, driven by reliability investments, vegetation management, and targeted grid improvements, including work on 46 priority feeders.

, and the total 32 customer hours of interruptions, reported separately for distribution lines that 33 require vegetation management and those that do not.

AI summary The text references total customer hours of interruptions, distinguishing between distribution lines requiring vegetation management and those that do not, highlighting reliability and maintenance considerations in service delivery.

Document: 330133 Date Filed: May 7, 2026 Page 4 1 C. Please provide the number of outages related to equipment failures 2 (exclusive of those associated with MEDs and EEDs) for each year from 3 2020 to 2025. 4 iii. Board staff notes that i...

AI summary The document requests reconciliation of conflicting outage reduction figures (14% vs. 18%) between NS Power's data and the 2025 Performance Standard Report, and detailed metrics for tree-related outages from 2020–2025, including investment data. NS Power provided 2024–2025 equipment failure outage numbers in response to NSEB IR-185 (M12619).

Document: 330133 Date Filed: May 7, 2026 Page 5 1 d) Please identify the percentage reduction/increase in customer hours of interruption 2 resulting in outages due to tree contacts only on lines on which NS Power completed 3 vegetation man...

AI summary The document requests data on outage reduction from vegetation management, capital expenditures for vegetation management (2019–2025), and analysis of NS Power’s balance between reliability improvements and rate affordability under climate change. It also seeks five-year average outage metrics for areas invested in the $206M reliability plan.

Please provide the five-year average outage frequency and duration results (similar to SAIDI and 28 SAIFI) for only those parts of NS Power’s system where the $206 million was actually invested in 29 the first year of the reliability plan....

AI summary The request seeks five-year average outage metrics (SAIDI/SAIFI) for NS Power’s system areas where $206M was invested in the first year of the reliability plan. It references 2025 work on 46 priority feeders, including equipment upgrades and tree trimming, as outlined in the report.

k on 46 priority feeders across the province 33 was completed in 2025 for targeted equipment replacements, protection upgrades, load growth 34 upgrades, building to roadside and tree trimming.”

AI summary The text references upgrades completed in 2025 on 46 priority feeders across Nova Scotia, including equipment replacements, protection upgrades, load growth improvements, roadside building work, and tree trimming.

on the 6 substations and the 23 32 downline protective devices along with the associated cost. 33 b) What performance metrics were the utility aiming to achieve with these projects?

AI summary The text inquires about performance metrics for infrastructure projects involving 6 substations and 23 downline protective devices, seeking to understand the utility's objectives related to these upgrades and their associated costs.

Document: 330133 Date Filed: May 7, 2026 Page 11 1 Request IR-31: 2 Regarding Wreck Cove Feeder 85S-401, on page 62 of the report states: 3 On November 23, 2025 a full outage affected all the customers on 85S-401 for 2.85 hours. 4 The outa...

AI summary The document raises two inquiries about Nova Scotia Power's (NSP) Wreck Cove Feeder 85S-401: (1) the cause and correction of a 2025 outage linked to generator testing at Wreck Cove Hydro Generating Station, and (2) plans for the remaining 43.75 km of off-road distribution line, including costs and timelines for the Bring-to-Roadside project.

impacting a total of approximately 5.95 kms of the line (although the 22 Halfway Brook project has a pole replacement component). 23 a) What are the current plans for the remaining 43.75 kms of the distribution line that will still 24 be o...

AI summary The document contains questions from the Nova Scotia Energy Board (NSEB) to Nova Scotia Power (NSP) regarding infrastructure planning for distribution lines, reliability impacts of off-road segments, outage statistics, and the distinction between 'switching' and 'reliability' planned outages. It requests data on SAIDI, CAIDI, and CAIFI metrics, as well as analysis of cost implications and mitigation strategies.

Five-Year Reliability Plan – Year One Results - NS Power continues to advance the execution of its Five-Year Reliability Plan (the Plan), with a - focus on improving reliability for Nova Scotians while maintaining an appropriate balance wi...

AI summary NS Power has completed the first year of its Five-Year Reliability Plan, investing $206 million in vegetation management, equipment upgrades, and grid modernization. The plan aims to improve reliability and reduce SAIDI by 20% by 2029, with a focus on maintaining affordability.

Equipment Upgrades and Grid Hardening - NS Power has continued to invest in equipment replacement and infrastructure upgrades designed - to improve system resilience. This includes the use of stronger poles and updated construction - stand...

AI summary NS Power has invested in equipment upgrades and grid hardening to improve system resilience, including stronger poles and updated construction standards. In 2025, targeted reliability work on 46 priority feeders reduced equipment-related outages by 14% compared to 2024. Substation and protective device upgrades are also planned for 2026.

of investment in vegetation management and transmission and distribution, including bringing more lines to the roadside. However, it is unclear from NS Power's responses to IRs how much further work NS Power is prepared to do to address th...

AI summary The document discusses NS Power's investment in vegetation management and infrastructure, as well as concerns about the target-setting approach for problem feeders. The SBA supports the use of the two-standard deviations method for performance metrics and highlights NS Power's acknowledgment of the need for continued improvement, aligned with the Five-Year Reliability Plan starting in 2025.