Topic:"Transmission Planning" in M12619

1 2 In preparing its capital plans, NS Power utilizes its established asset management approach, and 3 considers safety, reliability, climate change adaptation, and affordability, while incorporating the 4 Company’s decarbonization targets...

AI summary NS Power uses an asset management approach to prepare capital plans, focusing on reliability, resiliency, and affordability. The 2026 ACE Plan includes investments in reliability-focused improvements to the T&D system, addressing challenges from severe weather events through vegetation management, storm hardening, and grid modernization.

1 electricity from the generation plants to the distribution system throughout the province. 2 Transmission includes assets and equipment operating at 69 kV level or higher, and also 3 includes substation assets. 4 5 • Section 8.0 – Distri...

AI summary This section outlines the different categories of capital projects and expenditures, including transmission, distribution, general plant, and routine capital programs, with a focus on the Company’s ACE Plan and directives issued by the Board.

1,102,575 1,353,592 This project is for refurbishment of priority areas of the roof at the Sydney Coal Railway Transportation & Rail Maintenance Centre (Rail Centre). Total New Steam Spending for Subsequent Approval 10,402,603 24,560,654 T...

AI summary The text outlines various capital expenditure projects in Nova Scotia, including roof refurbishment, synchronous condensers, transmission tower rerouting, and network upgrades for wind farms. These projects aim to enhance infrastructure and support renewable energy integration.

CI# Project Title 2026 Budget ($) Project Total ($) C0071888 New Tidewater Substation 4,119,741 4,141,223 This project is to build a new Tidewater Substation to address increased residential electricity demand, improve system reliability,...

AI summary The document outlines several capital projects aimed at improving electricity infrastructure in Nova Scotia, including new substations, transformer replacements, and transmission line upgrades to enhance system reliability and meet growing demand.

or the replacement of the 10H-T2 transformer which serves the Victoria General Hospital and the IWK Children’s Hospital in Halifax. C0080108 L-5532 Replacements and Upgrades Phase 1 908,755 2,490,532 This project is for the replacement of...

AI summary The document outlines several transmission line replacement and upgrade projects, including the replacement of the 10H-T2 transformer serving key hospitals, upgrades to L-5532 and L-6043 transmission lines, and network upgrades for the Benjamin’s Mill Wind Farm. These projects are part of ongoing infrastructure planning and investment in Nova Scotia's power grid.

416,111 21,441,542 Gas Turbine Generation Plant G08 C0080135 CT - BGT2 Engine Refurbishment 2,147,663 2,462,664 Total Gas Turbine Generation Plant 2,147,663 2,462,664 Total Generation New Spending 16,563,774 23,904,206 5 Date: December 12,...

AI summary The document outlines NS Power's 2026 Annual Capital Expenditure (ACE) Plan, focusing on transmission investments from 2024 to 2028. The increased investment is attributed to Energy Storage and Synchronous Condenser projects. A figure illustrates historical, forecast, and budgeted transmission investments, highlighting a rising trend in spending.

1 2 The Board’s 2016 ACE Plan Order provided the following directive: 3 4 The Board directs that the Routine for Transmission widening be treated as a 5 separate project, and not a routine, in future ACE Plan Applications. NSPI is to 6 pro...

AI summary The Board's 2016 ACE Plan Order required NSPI to treat transmission widening as a separate project and provide annual progress reports. The last phase of the 69kV widening program was completed in 2024, and the transmission vegetation management program now includes only two initiatives. The T010 routine for 138kV, 230kV, and 345kV ROWs has increased in budget, reflecting ongoing efforts to improve system resilience.

l as a discussion paper on Transmission System Resiliency ahead of a Utility Resiliency 27 Workshop taking place at the 2025 CEATI T&D conference in November 2025 (attended by NS 28 Power). The discussion paper provides the initial finding...

AI summary The text references a discussion paper on Transmission System Resiliency, prepared ahead of a 2025 CEATI T&D conference workshop attended by NS Power. It outlines initial findings, proposed deliverables, and key actions for 2026, including the development of unified definitions for resiliency terms. A related document, 'M12012, NS Power 2025 Annual Capital Expenditure Plan, Board Order, August 19, 2025' is also cited.

782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan C0080135 Attachment 1 Page 19 of 21 BGT2 BSI March 25, 2025 Date: December 12, 2025 Page 350 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan C...

AI summary This document outlines a transmission line replacement project for L-7012, a 230 kV line built in 1982, requiring upgrades due to deteriorated assets identified through NS Power’s inspection program. The project involves replacing assets on 72 structures and is part of the 2026 ACE Plan.

mobile transformer connection capable of accommodating larger mobile units, addressing long-standing substation access challenges and eliminating the need for foreseeable future upgrades at the site. Summary of Related CIs +/- 2 years Purs...

AI summary The project involves adding a new 69kV-12kV transformer in Bridgewater to address aging infrastructure, increase capacity, and support long-term distribution planning. The existing 69-4.2kV transformer is over 68 years old and has exceeded its service life. The new transformer will operate in parallel with an existing one, providing redundancy and enabling the conversion of 4kV feeders to 12kV.

D) REDACTED 2026 ACE Plan C0070909 Attachment 1 Page 15 of 16 Bridgewater Area Planning Study Addendum Appendix B Economic Analysis Data W-AREA-2025-017 Nov 10, 2025 14 Date: December 12, 2025 Page 382 of 782 REDACTED REDACTED (CONFIDENTIA...

AI summary This document outlines the L7001 Replacements and Upgrades Phase 1 project, which involves replacing deteriorated transmission assets on 59 structures of a 230 kV transmission line built in 1979. The project is part of NS Power’s transmission line inspection program and is forecasted to cost $3,063,280.

required to complete the project within the available outage window, unforeseen material or contract cost increases, or unforeseen costs related to accessing structures in wet or remote locations. Date: December 12, 2025 Page 387 of 782 RE...

AI summary This document outlines the 76W-T1 Transformer Replacement project at Mahone Bay Substation, which involves replacing an aging transformer with a higher capacity unit, upgrading infrastructure, and improving safety standards. The project is part of the 2026 ACE Plan and has a forecasted cost of $2,818,855.

1,572,478 $ 1,572,478 $ - Deferred Generation 48913 HYD - Tusket Facility Refurbishment 2025 ACE Plan (for Subsequent Approval) $ 12,972,226 $ 1,078,895 Deferred Transmission C0011358 New Bridgewater Substation 2025 ACE Plan (for Subsequen...

AI summary The text presents a list of projects under the 2025 ACE Plan, including deferred and approved items related to generation and transmission, with associated costs and approval statuses. Key projects include the Tusket Facility Refurbishment, New Bridgewater Substation, and the Eastern Clean Energy Initiative (ECEI) - Transmission.

wherein single con ngencies can poten ally adversely affect the interconnected NPCC system, are designed and operated in accordance with NPCC Directory 1, Design and Opera on of the Bulk Power System. NS Power is required to follow the stan...

AI summary NS Power adheres to NERC and NPCC standards for its Bulk Electric System, ensuring compliance through regulatory approval processes. System design criteria, including transmission and clearance times, are updated to meet evolving standards and are documented in report NS Power-TPR-003-6.

he preserva ve reten on levels in the ground line area thereby maintaining acceptable toximetric thresholds necessary for protec on against fungal and insect a ack. Criteria for Wood Pole Retreatment Wood pole species found on the transmis...

AI summary NS Power outlines criteria for retreating wood poles on transmission and distribution systems, including testing based on DEP 7.51 and CSA standards, exceptions for environmental or landowner reasons, and data maintenance on a computerized database.

C. Milligan 10-Apr-24 Updated to include Transient Voltage 2024/02/20 6 Criteria per NERC TPL-001 Month DD, 2025 Page 103 of 113 Date: December 12, 2025 Page 622 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan App...

AI summary Nova Scotia Power Inc. outlines criteria for capital expenditures on its transmission system, divided into four classifications. Criteria may be superseded by Northeast Power Coordinating Council (NPCC) standards. System studies must use existing protection system characteristics to ensure adequacy and investment requirements.

protec on opera on. The term “Breaker failure protecƟon” is used interchangeably in this document. 4. Single conƟngency is defined as loss of one system element with or without a fault. Month DD, 2025 Page 105 of 113 Date: December 12, 202...

AI summary Nova Scotia Power Inc. outlines criteria for capital expenditure justification, emphasizing redundancy in primary transmission system protection, adherence to industry standards, and fault clearing times. Deviations require approval from the system planning group, with reliance on transient stability studies for exceptions.

e the fault described in item (d), the fault contribu on clearing me will be 16 cycles. Breaker failure protecƟon will be applied to all Primary Transmission. The design criteria are: 1. From normal system condiƟons, the Interconnected Tra...

AI summary The document outlines breaker failure protection for Primary Transmission and specifies design criteria ensuring system stability post-faults. It references Nova Scotia Power Inc.'s 2026 ACE Plan Appendix D and a detailed capital expenditure justification document.

where calcula ons are not specifically conducted: a. Under system normal, loading is limited to 100% of the 65°C manufacturer nameplate MVA for summer and 110% for winter; b. Under con ngency, the 15 minute short me ra ng is limited to 110...

AI summary Nova Scotia Power Inc. outlines its radial transmission policy, detailing loading limits for transmission lines under normal and contingency conditions. The policy emphasizes the importance of auxiliary equipment ratings and specifies scenarios for overload management to ensure grid reliability.

adial transmission line results in loss of supply with no other way to connect the radial load to the grid. A single transmission line may have more than one radial load connected to it. A lone substa on, which is dedicated to a single cus...

AI summary The document outlines procedures for managing radial loads exceeding 40 MW, including planning studies, load reduction measures, line upgrades, and the evaluation of a second transmission line for loads over 60 MW to enhance reliability.

grows past 60 MW, a second transmission line will be evaluated regardless of performance. Month DD, 2025 Page 113 of 113 Date: December 12, 2025 Page 632 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan Appendix E...

AI summary The document discusses NS Power's Mersey Hydro Update, noting that if capacity exceeds 60 MW, a second transmission line will be evaluated regardless of performance. This is part of the 2026 ACE Plan Appendix E, dated December 12, 2025.

ruction support for both Network Upgrades and 25 Transmission Provider Interconnection Facilities. There has been significant progress in these 10 https://novascotiarbp.com/updates Page 16 of 55 Date: December 12, 2025 Page 669 of 782 REDA...

AI summary The document highlights progress in Network Upgrades and Transmission Provider Interconnection Facilities under the 2026 ACE Plan, part of a multi-year planning cycle toward 2030 goals. The text references an external update page and a non-confidential update document.

1 6.2.3 Grid Stability & Renewable Integration Resources 2 3 Transitioning from a traditional power system which is largely made up of synchronous generators 4 to a power system which will rely heavily on inverter-based resources (IBRs) su...

AI summary Transitioning to inverter-based resources (IBRs) like wind and solar requires grid stability measures such as synchronous condensers and FACTS devices. NS Power, following DOE directives, prioritizes inertial support projects at Benjamin’s Mill and Wedgeport. The NS-NB Reliability Intertie Project aims to enhance transmission reliability between Nova Scotia and New Brunswick.

ransmission line between Onslow, NS and 28 Salisbury, NB required to improve the reliability of Nova Scotia’s transmission link to the New 29 Brunswick Power (NB Power) system and the broader Eastern Interconnection, continues to 30 progre...

AI summary A transmission line project between Onslow, NS and Salisbury, NB aims to enhance Nova Scotia’s grid reliability by Q4 2028. Progress updates mention Q1 2025 activities by Wasoqonatl Transmission. The text references the 2026 ACE Plan Appendix F and the 'Path to 2030 – 2025 Update' as non-confidential documents.

1 The Decision Gate 3 (DG3) governance milestone is planned for December 2025. Advancement 2 of the project through DG3 enables project sanction, with kickoff of the construction contract in 3 Q1 2026. This will be followed by the mobiliza...

AI summary The document outlines project milestones for the Reliability Intertie, including Decision Gate 3 (DG3) in December 2025 and Stage 2 transmission planning. It also highlights the need for 300MW of new fast-acting generation by 2030, as per the 2030 Clean Power Plan and Evergreen IRP analysis. NS Power is not currently engaged with NB Power on Stage 2 but plans to collaborate with stakeholders on interregional transmission expansion.

1 The following are existing and future milestones to enable this: 2 3 • NRCan and the NS DOE designated Wind Energy Areas (WEA), which will be managed 4 by the Canada Nova Scotia Offshore Energy Regulator (CNSOER), in July 2025. 5 6 • A s...

AI summary Nova Scotia's offshore wind development includes milestones like WEA designation in 2025, strategic direction letters, and a 2026 bid process. While not part of the 2030 Clean Power Plan, NS Power monitors progress. The NZA-led study (2024-2026) evaluates offshore wind's potential for decarbonization, hydrogen, and export opportunities, with transmission planning phases ongoing.

ission expansion plan to support OSW, respectively. Ultimately, this study is 26 anticipated to be completed in Q1 2026 and will provide a thorough understanding of the 27 opportunities and challenges for integrating OSW into the Atlantic...

AI summary The document discusses a study on integrating offshore wind (OSW) into the Atlantic Canadian grid, led by NZA with NS Power's participation. The study, anticipated to complete in Q1 2026, will assess opportunities and challenges for provincial and regional integration, including domestic and export considerations.

1 8.0 PROJECT ACCOUNTABILITIES, COORDINATION, AND RISK 2 MANAGEMENT 3 4 NS Power believes that the Nova Scotia 2030 Clean Power Plan is a comprehensive and 5 appropriate clean energy transition plan. It is based on extensive studies and st...

AI summary NS Power asserts the Nova Scotia 2030 Clean Power Plan is comprehensive, based on stakeholder engagement and studies. It outlines roles: Province manages renewable projects until 2030 RES targets, NS Power handles fuel conversions and transmission, and IESO-NS oversees battery storage and fast-acting generation.

gets. projects. customers. studies for • Transition transmission responsibility for connected system impact resources from NS studies to IESO-NS Power. for transmission connected resources. Page 47 of 55 Date: December 12, 2025 Page 700 of...

AI summary The document outlines a transition of responsibility for system impact studies related to transmission-connected resources from Nova Scotia Power to the Independent Electricity System Operator - Nova Scotia (IESO-NS). This shift is part of the 2026 ACE Plan Appendix F and the 'Path to 2030 – 2025 Update' initiative.

2030 Accountability NS Power Key Action IESO-NS NS Government Partner Key Projects Items Action Items Key Action Items Action Items • Implementation of TPIF and associated Network Upgrades. Battery IESO-NS and • Procure and finance • Procu...

AI summary The document outlines key actions by NS Power and IESO-NS for 2030, including implementing TPIF and network upgrades, procuring 150 MW/600 MWh battery storage via regulated utility models, and transitioning grid stability responsibilities. Partnerships with IPPs and the NS Government are emphasized for energy storage procurement and grid-scale projects.

complete work to regulated model, review and enable including issuance of transmission competitive required connection to procurements for authorizations. Salisbury, NB. required products • Advocate for and services. federal support • Work...

AI summary The text outlines initiatives for transmission expansion, competitive procurements, and collaboration with the NB Government on projects like Salisbury, NB, and Point Lepreau. It emphasizes the role of IESO-NS in implementing TPIF and Fast-Acting Generation resources, along with regulatory coordination.

. 26 17 4.5 Trimming and Removal of Trees Around Existing Power Lines .......................... 27 18 5.0 STORM HARDENING – TARGETED EQUIPMENT REPLACEMENTS AND 19 UPGRADES .....................................................................

AI summary The document outlines infrastructure upgrades for Nova Scotia's power grid, including tree trimming, storm hardening, equipment replacements, and grid modernization programs. It is part of the 2026 Annual Capital Expenditure (ACE) Plan, focusing on distribution, transmission, and substation improvements.

1 LIST OF FIGURES 2 3 Figure 1: Forecast Investment by Reliability Program 2025-2029 ($ millions) ............................. 7 4 Figure 2: Contribution to CHI by Outage Cause (2020 – 2024) Performance Standards ............11 5 Figure 3...

AI summary The document outlines a list of figures related to reliability programs, vegetation management, corridor widening, and rights-of-way establishment in Nova Scotia. Key themes include reliability investments, outage cause analysis, customer interruption metrics (CHI), SAIDI improvement targets, and infrastructure planning initiatives for 2025.

1 Figure 26: In Progress Construction of New Mount Uniacke Substation .................................... 42 2 Figure 27: 2025/2026 Advanced Grid Modernization Progress Overview ................................. 44 3 Figure 28: 2025 Plann...

AI summary The document outlines infrastructure projects and planning for grid modernization, reliability, and expansion in Nova Scotia, including substation construction, remote terminal unit installations, vegetation management, right-of-way widening, and conductor upgrades for 2025/2026.

ments 8 detailed in year one of the Plan. The Plan has a goal of reducing the overall duration and frequency 9 of outages while balancing the affordability of these investments for customers. 10 11 1.1 Five-Year Reliability Plan Commitment...

AI summary NS Power's Five-Year Reliability Plan aims to reduce outage duration and frequency through three core programs: vegetation management, storm hardening, and grid modernization. The plan balances reliability improvements with customer affordability, focusing on infrastructure upgrades and advanced grid technologies.

2026 ACE Plan Appendix G Page 15 of 71 NS Power Five-Year Reliability Plan - Update Non-Confidential 1 • Addition of six RTUs improving substation communication and control, supporting 2 quicker response and restoration of service in the e...

AI summary NS Power's 2026 ACE Plan Appendix G outlines infrastructure upgrades to enhance grid reliability, including RTU additions, substation transformer replacements, new substation construction in Mount Uniacke, transmission structure work, and reconductoring of 33.7 km of transmission lines to improve resilience and winter peak capacity.

Complete in Remainder of Year Distribution 297 kms 183 kms 59 kms 242 kms (Revised due to Corridor Wildfire Mitigations) 1 Widening with Managed Distribution ROWs Vegetation Establish 330 kms 229 kms 89 kms 318 kms (Revised due to Manageme...

AI summary The document outlines vegetation management activities for distribution and transmission corridors, noting revisions to project distances due to wildfire mitigation measures. Additional controls by the Department of Natural Resources reduced work efficiency, with details in the Storm Hardening – Vegetation Management section.

Planned Completed (Due to Wildfire on Track Kms YTD Mitigation) Kms (Y/N) Distribution Corridor 297 183 242 Widening with Managed Rights-of-Way 19 20 Figure 10 below illustrates the locations where distribution rights-of-way have been wide...

AI summary The document outlines NS Power's infrastructure projects to widen distribution and transmission corridors with managed rights-of-way, aiming to improve reliability by increasing separation between conductors and forest edges. It details $15 million in 2025-2029 forecast investments for transmission corridor widening, with $3 million anticipated for 2025 year-end spending.

2026 ACE Plan Appendix G Page 25 of 71 NS Power Five-Year Reliability Plan - Update Non-Confidential 1 As of October 31, approximately 87 percent of the 2025 program has been completed and is on 2 track to have the full project work comple...

AI summary NS Power reports that 87% of the 2025 program has been completed and is on track for full completion by year-end. Figure 11 outlines vegetation transmission widening projects, including the L-6503-added line from Onslow to Trenton, which has 17 km completed year-to-date.

2026 ACE Plan Appendix G Page 31 of 71 NS Power Five-Year Reliability Plan - Update Non-Confidential 1 5.0 STORM HARDENING – TARGETED EQUIPMENT REPLACEMENTS AND 2 UPGRADES 3 4 2024-2029 Forecast Investment: $916 million 5 Forecasted Perfor...

AI summary NS Power's 2024-2029 Storm Hardening Plan includes $916 million for distribution, transmission, and substation upgrades to enhance grid reliability and comply with regulations. Investments target aging equipment, aiming to reduce SAIDI by 0.13–0.24 hours.

ge 746 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan Appendix G Page 39 of 71 NS Power Five-Year Reliability Plan - Update Non-Confidential 1 2 Figure 23: 2025 Completed Padmount Transformer Replacements and Upg...

AI summary NS Power outlines its 2025-2029 transmission system upgrade plan, allocating $196 million over five years and $32.6 million for 2025 alone. Projects focus on replacing structures, reinforcing conductors, and realigning lines to enhance reliability and resiliency, informed by risk profiles and past performance.

Non-Confidential 1 Figure 24: Transmission System Program - 2025 Overview Category # Transmission Line Upgraded Replacements and Upgrades 29 Line Rebuilds 3 Asset Life Extension Province Wide Water Crossing Upgrades 3 Line Realignment 2 2...

AI summary NS Power outlines its 2025 Transmission System Program, including 29 replacements/upgrades, 3 line rebuilds, province-wide asset life extension, and 3 water crossing upgrades. These investments aim to strengthen transmission reliability through infrastructure management, as detailed in the 2025 ACE Plan and illustrated in Figure 25.

ribution Establish New ROWs 377 kms Vegetation Management Trimming and Removal of Trees 192 kms Transmission Transmission Corridor Widening 121 kms Vegetation Management Distribution System Equipment 15 Trip Saver Additions Targeted Upgrad...

AI summary The document outlines infrastructure projects for Nova Scotia Power's reliability plan, including new right-of-way establishment, vegetation management, transmission corridor widening, and distribution system upgrades. Specific initiatives include conductor replacements, substation transformer replacements, and targeted equipment additions to enhance grid reliability.

Transmission System Upgrades 28 lines Substation Upgrades and 8 Transformers Replacements Remote Terminal Units (RTUs) 8 RTUs Downline Connectivity 35 Devices Advanced Grid Modernization Fault Location Isolation and 24 Devices Service Rest...

AI summary The 2026 ACE Plan Appendix G outlines NS Power's priority transmission system upgrades, including substation upgrades, RTUs, and FLISR devices. The 2026 priority feeder list includes 40 feeders, 31 newly identified and 9 carried over from 2025, based on outage data and load growth analysis. The list may be revised following full 2025 outage data analysis.

theast 847 48 West 2,389 133 Total 5,261 293 3 4 7.1.2 Transmission Corridor Widening with Managed Rights-of-Way (ROW) > 69KV 5 6 2026 Forecast Investment: $3.3 million 7 8 NS Power’s transmission vegetation management plan is strategicall...

AI summary NS Power's 2026 transmission vegetation management plan uses growth modeling, IVM, LiDAR, and inspection data to optimize forestry crew focus, with a $3.3M investment forecast. The plan is part of a five-year reliability initiative, emphasizing predictive planning and hazard mitigation in transmission corridors.

2026 ACE Plan Appendix G Page 60 of 71 NS Power Five-Year Reliability Plan - Update Non-Confidential 1 7.2.2 Transmission System Upgrades and Replacements 2 3 2026 Forecast Investment: $43.0 million 4 5 In 2026, NS Power plans to invest ap...

AI summary NS Power plans to invest $43.0 million in 2026 for transmission system upgrades and replacements, including traditional infrastructure work, site-specific projects, and ongoing upgrade programs to enhance reliability and resiliency.

2026 Annual Capital Expenditure (ACE) Plan (NSEB M12619) NSPI Responses to Consumer Advocate Information Requests 1 Request IR-23: 25 (e) Yes, NS Power does believe that creating distance between the treeline edge and power 26 lines will c...

AI summary NSPI responds to information requests regarding the 2026 Annual Capital Expenditure (ACE) Plan. It discusses the effectiveness of vegetation management in reducing outages, the coding of outage events, and the use of frontline employee data for decision-making.

2026 ACE Plan NSEB IR-1 Attachment 1 Page 1 of 3 1987.25 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17.1 17...

AI summary This document is part of the 2026 ACE Plan and includes a table with data related to project titles, forecasted spending, and asset classes under the reliability enhancement category for transmission. The table contains a large number of repeated values, likely representing data points for different projects or categories.

NON-CONFIDENTIAL 1 Request IR-18: 2 3 Section 7.0 Transmission pages 46 to 50 4 5 In reference to Figure 19 on page 46, please describe the reasons for the proposed significant 6 decrease in transmission investment for 2026, 2027 and 2028...

AI summary The document contains a request (IR-18) asking for an explanation of the significant decrease in transmission investment for 2026, 2027, and 2028 compared to the 2025 ACE Plan. The response directs the requester to refer to NSEB IR-5 for further details.

NON-CONFIDENTIAL 2026 ACE Plan Condition Inputs Transmission Projects Line Criticality Line Reliability Clearance Violation Inspection C0080110 - L7012 Replacements and 5 1 1 5 Upgrades Phase 1 1 Request IR-45: 2 3 Directives & Misc pages...

AI summary The 2026 ACE Plan includes T&D projects that are part of the Five-Year Reliability Plan, which are expected to have a positive impact on performance standards. A concern was raised about the use of the term 'net,' implying some projects might have a negative impact, but NS Power clarified that no such projects are planned.

8.7 Performance Standards

AI summary This section outlines the performance standards related to electricity transmission and distribution, including metrics such as SAIFI, SAIDI, and CKAIFI. These standards are used to evaluate the reliability and efficiency of the electricity grid.

Experience Rating Statement for 2025

AI summary The Experience Rating Statement for 2025 outlines the performance and reliability metrics of the electricity transmission and distribution systems in Nova Scotia. It includes key reliability indicators such as SAIFI, SAIDI, and CKAIFI, and provides insights into system performance and customer interruptions.

REDACTED 2026 ACE Plan NSEB IR-116 Attachment 1 Page 4 of 52 Figure 1: Bridgewater Area - Transmission Switching Diagram 3 Figure 2: Existing Sub-transmission System - Bridgewater Area Figure 3: Town of Bridgewater Figure 4: Feeder Circuit...

AI summary The document contains figures and tables related to the Bridgewater Area's transmission and distribution systems, including load history, growth rates, and infrastructure details. These materials are part of the 2026 Annual Capital Expenditure (ACE) Plan submitted to the Nova Scotia Energy Board.

Transmission Corridor Widening (2016 to 2025) Line Total Line Length (km) Voltage (kV) % of Line completed (2016-2024) Vegetation Mangement Cost NERC Vegetation Management Requirement L-5003 13.5 69 28% N/A No L-5004 12.1 69 10% N/A No L-5...

AI summary The document presents a table outlining the progress of transmission corridor widening projects from 2016 to 2025, detailing line lengths, voltage levels, completion percentages, and vegetation management costs for various lines. The data provides an overview of the status of these projects as of 2024.

Transmission Vegetation Management Costs from 2016 to 2025 by Voltage. Year Voltage (kV) 2016 2018 2019 2020 2022 2023 2025 69 $ 5,419,868.00 $ 5,609,478.00 $ 5,446,286.00 $ 2,379,540.00 $ 4,588,800.00 $ 5,388,495.00 $ - 138 /230/345 $ 585...

AI summary The document presents transmission vegetation management costs from 2016 to 2025 by voltage level, along with line interruption data including interruption counts, duration, and customer impact for various years.

2026 Annual Capital Expenditure (ACE) Plan (NSEB M12619) NSPI Responses to NSEB Information Requests 1 (d) Since this unit is in cold reserve and is only intended to be used during periods where the 24 (d) Please refer to part (a). Continu...

AI summary The document discusses the 2026 Annual Capital Expenditure (ACE) Plan and NSPI's responses to information requests from the NSEB. It highlights the need for continued investment in Point Aconi to ensure safe and reliable operation, as well as the testing of control system design parameters for inverter-based resources (IBRs) to maintain grid stability.

(b) "Regular" refers to Regular Administrative Overhead, also known as Labour AO. NS Power has three types of AO Rates, which are calculated in accordance with Board- 1 approved Accounting Policy 6230 – Application of Administrative and Ve...

AI summary The text discusses NS Power's Administrative Overhead (AO) rates, referencing Accounting Policy 6230, and includes several inquiries regarding the increase in Steam projects in 2026, the DLR Deployment project, and the Dynamic Line Rating upgrade. Responses and requests are outlined, with some references to external events and presentations.

16 1 Request IR-28: 2 3 Please refer to the Application Page 734 of 782, Figure 12: Establish New Rights-Of-Way – 4 2025 5 6 (a) Please confirm the definition of a 'New Right-Of-Way' applies only to pre-existing 7 distribution lines that d...

AI summary The document discusses two requests related to rights-of-way and transmission projects. It confirms that 'New Right-Of-Way' refers to pre-existing distribution lines without a cleared ROW and provides statistics on the unmanaged distribution lines. It also confirms that the L-6536 transmission line extends into New Brunswick and explains its importance for system reliability between the two provinces.

2025 ACE Carryover Spending - as of December 31, 2025 Project 2025 ACE Plan 2025 ACE Plan Amount C0043010 2022/2023 Wood Pole Retreatment Program 79,470 656,597 - (79,470) C0031268 AMO Critical Equipment Online Monitoring 34,543 432,380 53...

AI summary The document presents a detailed breakdown of the 2025 ACE Carryover Spending as of December 31, 2025, outlining various projects, their planned and actual spending, and variances. It includes initiatives such as the Wood Pole Retreatment Program, Advanced Metering Infrastructure, and multiple transmission and distribution projects.

g the transmission and distribution system, and adopting modern technologies that enable faster outage detection, isolation, and restoration, all aimed at building a more resilient grid for customers. We also welcome the Board-appointed th...

AI summary The document discusses investments in grid resilience, including modern technologies for outage management, third-party review of the Reliability Plan, and the 2026 ACE Plan's Path to 2030 Update. It highlights grid-scale battery storage projects and the Wasoqonatl Transmission Inc. partnership for new interconnections.

FOR PETROLEUM IMPACTED SITES IN ATLANTIC CANADA Pha III E SA Rep ort, Se ctio n 5 .4 se Computing Asset Management Total 2,314,236 4,471,479 4,780,329 4,453,919 P001/P03011744 Property Improvement and Furniture 3,393,573 4,882,004 4,125,29...

AI summary The document discusses the variance between the $6 million shown in N-18 and the $9.5 million forecast for 2025 line transmission replacement work, noting that underspending occurred due to fewer storm impacts and reactive events on transmission lines than originally forecast.

Request IR-57: - T010 and D010 Report on page 117 to 118 provides an update on the progress made on the >69kV transmission widening for T010. - a) How much of the planned 2025 work was completed for each of T010 and D010 by December 31, 20...

AI summary The document requests an update on the progress of the >69kV transmission widening projects for T010 and D010, specifically asking about the amount of planned 2025 work completed by December 31, 2025, and the year-end spending for both projects.

Transmission Capital Investments

AI summary The section titled 'Transmission Capital Investments' introduces the topic of capital expenditures related to transmission infrastructure. It likely discusses the need for investment in transmission systems, associated costs, and potential impacts on the electricity grid.

Request IR-198: - Figure 42 on page 763 illustrates the 2026 Targeted Transmission Projects. How were the - locations selected?

AI summary The text references Figure 42 on page 763, which illustrates the 2026 Targeted Transmission Projects, and asks how the locations for these projects were selected.

pdf page 88 – Evergreen IRP vs. 2026 ACE Plan Forecast Comparison by Unit: Please provide a table showing the Integrated Resource Plan (IRP) and ACE Plan dollar amounts expected to be spent per unit. 1. Are all assets rated each year or is...

AI summary The text requests a comparison between the Evergreen IRP and the 2026 ACE Plan in terms of forecast expenditures per unit. It also asks for clarification on asset rating thresholds and changes in expenditure forecasts for various energy generation and transmission projects between the 2025 and 2026 ACE Plans.

1. For those interruptions from Loss of Supply not a result of tree contacts, please explain when they occurred, how many of them occurred (by cause) and which areas of the province they occurred. T010 and D010 Report on page 117 to 118 pr...

AI summary The text contains a series of questions and requests related to transmission projects (T010 and D010), asset replacement ranges, and the CIS Replacement Project under NS Power’s ACE Plan. It also references a boiler refurbishment project (G01) and asks for details on progress, spending, and risk ratings.

ved and completed since the 2021 ACE Plan. If the cost of C0043010 is excluded, please confirm that the total actual cost of the nine transmission line replacement and upgrade projects is $22,377,307. 1. Please provide the dates on which t...

AI summary The text requests confirmation of the total actual cost of nine transmission line replacement and upgrade projects excluding C0043010 and asks for details on the original commissioning dates, kilometers refurbished, and the utility's assessment of the effectiveness of these activities.

Request IR-9: - Refer to the Application, Appendix G, Page 751 of 782, Lines 1-20, Section 6.0 Advanced Grid - Modernization Programs. - a) Please explain whether and how the investments in the Grid Modernization Programs, including FLISR,...

AI summary The document contains several regulatory requests (IR-9 through IR-12) related to grid modernization, capital spending, and energy storage projects by NS Power. The requests seek clarification on how investments impact grid capacity, the status of new ROW projects, the meaning of figures in capital spending summaries, and the approval status of a working group related to grid resiliency.

vent scheduled for February 3, 2026, as described in this event link below: 1. Please confirm whether the DLR Deployment project that NS Power will present at Distributech, described as the largest undertaken in North America, is included...

AI summary The text includes questions regarding NS Power's upcoming presentation on the DLR Deployment project, the benefits of the Dynamic Line Rating upgrade, oversight under IESO Nova Scotia, and grid modernization programs. It also references specific sections of the Application and asks about the impact of these investments on customer demand and system capacity.

1 Request IR-17: 2 3 With respect to project C0070586: 4 5 a) Please provide support and context for the assertions that "it is not always possible to take 6 an outage to L-6536" and that "Taking an outage to this line negatively impacts c...

AI summary The document includes a series of requests related to project C0070586, focusing on transmission line outages, switch capabilities, replacement plans, contingency amounts, and procurement processes. The requests aim to clarify technical and financial aspects of the project.

n plans (pre- and post-storm), and other elements of the plan necessary to provide a fulsome evaluation. Request IR-28: With respect to Appendix G, Section 5.3 and Exhibit N-7, RIR-12 in M12012: 1. Is NS Power a member of Grid Assurance’s...

AI summary The text contains several regulatory requests directed at NS Power regarding its participation in spare transmission equipment programs, reliability performance from FLISR projects, and the review process for PDM documentation. These requests aim to evaluate NS Power's preparedness, transparency, and compliance with regulatory expectations.

1690 Hollis Street, Joseph Howe Building, 11th Floor, PO Box 2664, Halifax, Nova Scotia, Canada B3J 3P7 April 15, 2026 Nova Scotia Energy Board 3rd Floor, Summit Place 1601 Lower Water Street Halifax, Nova Scotia B3J 3P6 RE: Interim Guidan...

AI summary The Minister of Nova Scotia emphasizes that the IESO must lead competitive procurements for new transmission and electricity system resources, ensuring bulk system adequacy, reliability, and cost-effective solutions for ratepayers.

cations include the removal of multiple trees. - Addition of six RTUs improving substation communication and control, supporting quicker response and restoration of service in the event of an outage. - Completed replacement of two substati...

AI summary The document outlines various infrastructure improvements, including the addition of RTUs, transformer replacements, substation upgrades, and transmission line reconductoring, aimed at enhancing grid reliability and resilience. These efforts are part of ongoing projects to improve service and support community growth.

7.1.1 Coordination with the IESO Nova Scotia [201] In a letter dated October 9, 2024, the Minister of Energy directed NS Power "…to provide the equipment and systems necessary to maintain the stability, reliability, and power quality of th...

AI summary The Minister of Energy directed NS Power to ensure grid stability for renewable energy integration, including the use of synchronous condensers. The IESO is expected to lead competitive procurement for transmission and system resources, as outlined in the More Access to Energy Act.

NS POWER PANEL 73 Cr-ex, (Murphy) 1 just to confirm what that refers to. 2 THE CHAIR: So we'd better make that 3 clear on the record. So can we go back to the first page 4 again? 5 Okay. So we're referring to a 6 document dated May 2nd, 20...

AI summary The proceeding discusses a clarification request regarding the term 'transactions per labour hour' in a report on T&D WAM Phase II dated May 2, 2025. The term refers to the number of transactions recorded per hour of employee work, tracked through PowerPlan.

NS POWER PANEL 311 Cr-ex, (Mahody) 1 (MacIntosh) Mr. Mahody, we can A. 7 And under the description here, Q. 8 we have: 9 10 11 12 13 14 15 16 17 18 19 20 L-6536 is a 138kV transmission line that was built in 1991. This project is for the r...

AI summary The document discusses a project to replace two 138kV in-line transmission switches in Amherst, Nova Scotia, which are no longer capable of live-line operation and have reached end-of-life. A reference is made to a Board IR related to this project, with an exhibit cited for further details.

NS POWER PANEL 343 Cr-ex, (Mahody) 1 demonstrate the success associated with this post-2016 2 transmission widening that's occurred? And I'm not taking 3 away at all from the narrative you've just indicated. I'm 4 just wondering if there's...

AI summary The discussion focuses on the availability of data regarding tree contacts on 69kV transmission lines following post-2016 transmission widening. The witness acknowledges the need to provide this information as part of the undertaking process, noting that while a full analysis has not been completed, the number of contacts can be provided without requiring an extensive report.

NS POWER PANEL 355 Cr-ex, (Mahody) 1 produce? 18 2025 transmission line replacement work, has any of that 19 work been deferred into 2026. INTERNATIONAL REPORTING INC. CERTIFIED COURT REPORTERS 1 (Beaton) I don't have specifics, A. 2 but b...

AI summary The proceeding discusses the potential deferral of 2025 transmission line replacement work into 2026. A witness notes that a reduction in spending may be due to deferrals, which are now included in the explanation provided.

INTERNATIONAL REPORTING INC. CERTIFIED COURT REPORTERS demonstrated to have achieved cost minimization. That's why, in the last couple of years, we've been really focused on these distribution routines and transmission routines and the Rel...

AI summary The speaker acknowledges Nova Scotia Power's efforts in cost minimization, particularly in distribution and transmission routines, and the ongoing third-party Reliability Plan review. They suggest there are still areas for improvement in cost effectiveness and mention the Vegetation Management Program as an example.