Topic:"Capacity Costs" in M12619

bility. These targeted reliability projects include vegetation 26 management, storm hardening and reliability upgrades, targeted device replacements, and 27 grid modernization. 28 Date: December 12, 2025 Page 8 of 782 REDACTED REDACTED (CO...

AI summary The 2026 ACE Plan focuses on safety compliance, environmental compliance, and aligning with the coal phase-out and renewable energy goals. It includes projects such as hydro dam safety upgrades, PCB remediation, and grid modernization, and addresses directives from the 2025 ACE Plan Decision.

,911 697,061 1,270,573 Approved C0067023 LIN2 2024/25 Capacity 371,610 1,083,800 1,290,724 1,257,127 Approved Requirement Transmission C0044391 Eastern Clean Energy 20,641,301 800,229,290 42,563,143 684,624,989 Filed by Wasoqonatl Initiati...

AI summary The document outlines various transmission and infrastructure projects, including the Eastern Clean Energy Initiative (ECEI) and the 2026 ACE Plan, with associated costs and approval statuses. These projects are part of broader efforts to enhance energy infrastructure in Nova Scotia.

1 are necessary. This approach is driven by and aligned with NS Power’s asset management strategy 2 for T&D assets and includes implementation by the Reliability team. In addition to the dedicated 3 areas of scope and responsibilities for...

AI summary The document discusses NS Power's reliability initiatives, including updates on the Reliability Team's progress and alignment with the company's asset management strategy. The Board directed NS Power to provide updates on the Reliability Director's implementation progress as part of the ACE Plan, with a focus on reducing outage frequency and duration in 2025.

f 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan CONFIDENTIAL (Attachments Only) 1 2023) as a trend which is expected to continue into the future. However, NS Power’s typical 2 performance compares favourably with t...

AI summary The 2026 ACE Plan discusses NS Power's performance in terms of outages, noting that tree contacts and failed equipment are the leading causes of customer outages. Continued investment in vegetation clearing and other capital initiatives is expected to improve system reliability and resiliency.

and duration of outages caused by failed 29 equipment when compared to recent history. These years were also the most challenging years for 30 severe weather events. The increase in failed primary aerial conductors is believed to be attrib...

AI summary The 2026 ACE Plan discusses the impact of severe weather events on infrastructure reliability, noting increased failures in primary aerial conductors due to high wind stress. However, NS Power's targeted asset investments have improved equipment reliability, with 2025 showing a positive trend in reducing customer interruptions.

Not Applicable (NA) NR NR Mechanical Discipline Drawings Not Applicable (NA) NR NR Total # Deliverables for 2 11 11 11 10 this Project % Defined/Complete 100% 100% 92% 92% 92% towards Class Estimate Comments: This project is being filed as...

AI summary The text discusses a Class 3 project estimate with 92% of deliverables completed and a 15% contingency applied for risk. It references the 2026 ACE Plan and includes redacted pages from a document dated December 12, 2025.

025 Page 291 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) REDACTED 2026 ACE Plan C0080133 Attachment 2 Page 5 of 7 Nova Scotia Power 2026 TUC3 IP Major 1.0 Executive Summary Siemens Energy will be offering the following scop...

AI summary This document outlines the scope of services Siemens Energy will provide for the Nova Scotia Power 2026 Tufts Cove 3 IP Major outage, including pre-planning activities, resource allocation, and specific tasks such as bearing replacement, casing elevation checks, and rotor bore inspection.

REDACTED (CONFIDENTIAL INFORMATION REMOVED) REDACTED 2026 ACE Plan C0068888 Page 2 of 11 Why do this project now? This project is necessary at this time due to the increasing reliance on heavy fuel oil (HFO) at Tufts Cove, driven by ongoin...

AI summary The project is necessary due to increased reliance on heavy fuel oil at Tufts Cove, which requires a more efficient ash management system. The existing fly ash hauling system is not suitable for sustained use, and expanding vacuum truck usage would increase costs and safety risks. Installing a dedicated ash conveyance and collection system will reduce operating costs and safety risks.

17 12 % Defined/Complete 100% 100% 85% 63% 44% Percentage towards Class Estimate Comments: This project is being submitted as a Class 3 estimate. The defined deliverables for this project indicate that 85% of Class 3 deliverables are compl...

AI summary This document discusses a Class 3 project estimate with 85% of deliverables completed, a 15% contingency for risks like undefined scope and import tariffs. It also references the 2026 ACE Plan and a TUC3 Continuous Ash Hauling System alternative summary.

0.0 0.13 (3,419,061.4) 2062 - - - - 0.0 0.1 - 0.0 0.0 0.0 0.13 (3,419,061.4) 2063 - - - - 0.0 0.1 - 0.0 0.0 0.0 0.12 (3,419,061.4) 2064 - - - - 0.0 0.1 - 0.0 0.0 0.0 0.11 (3,419,061.4) 2065 - - - - 0.0 0.1 - 0.0 0.0 0.0 0.11 (3,419,061.4)...

AI summary The document contains a table with numerical data and a section titled 'TUC3 Continuous Ash Hauling System' discussing avoided cost calculations for a project with CI Number C0068888, dated December 4, 2025.

CI Number: C0068888 Project No. : Continuous Ash Hauling System Avoided Replacement Energy Costs Avoided Unplanned Repair Costs Total Annual Avoided Costs Year 2026 2027 2026 2027 2026 2027 Replacement Energy Cost ($/MWh) 0.00 0.00 Repair...

AI summary The Continuous Ash Hauling System analysis shows no energy replacement or unplanned repair costs for 2026 and 2027, with a 100% capacity factor in 2026 dropping to 50% in 2027. The total capital cost of the alternative is listed as $1,359,984. The 'Do Nothing' option is presented as an alternative.

ion/Structure (Tower) Discipline Drawings Not Applicable (NA) NR Tower/Structure Location/Spotting Complete (C) NR S/P P C C Instrument Datasheets Not Applicable (NA) NR NR/S Electrical Discipline Drawings Preliminary (P) NR NR S/P P/C Ins...

AI summary The project is classified as a Class 3 estimate with 67% of deliverables completed. A 15% contingency was selected to address risks like overtime, material cost increases, and access challenges in remote or wet locations.

l Plan & Drawings Not Applicable (NA) NR Foundation / Structure (Tower) Discipline Drawings Preliminary (P) NR S/P P Tower / Structure Location / Spotting Complete (C) NR S/P P C C Instrument Datasheets Complete (C) NR NR/S P P/C C Electri...

AI summary The project is being filed as a Class 3 estimate with 91% of deliverables completed. A 15% contingency was selected to account for unforeseen material and contract cost increases, schedule setbacks, and execution complications.

anned for January 2029. This solution provides the required capacity at the lowest cost while achieving full system standardization to 12 kV and retiring aging assets at 70W-High Street Substation. W-AREA-2025-017 Nov 10, 2025 i Date: Dece...

AI summary The text discusses a solution to provide required capacity at the lowest cost, achieving full system standardization to 12 kV and retiring aging assets at the 70W-High Street Substation. It references a planning study addendum for the Bridgewater Area and mentions the 2026 ACE Plan.

P Foundation/Structure (Tower) Discipline Drawings Not Applicable (NA) NR Tower/Structure Location/Spotting Complete (C) NR S/P P C C Instrument Datasheets Not Applicable (NA) NR NR/S Electrical Discipline Drawings Preliminary (P) NR NR S/...

AI summary The project is classified as a Class 3 estimate with 67% of deliverables completed. A 15% contingency was selected to address risks such as overtime, material cost increases, and challenges related to accessing remote or wet locations.

Not Applicable (NA) NR Foundation / Structure (Tower) Discipline Drawings Not Applicable (NA) NR Tower / Structure Location / Spotting Not Applicable (NA) NR Instrument Datasheets Complete (C) NR NR/S P P/C C Electrical Discipline Drawings...

AI summary The project is being filed as a Class 3 estimate with 87% of deliverables completed. A 15% contingency was selected to address risks related to overtime work and unforeseen material or contract cost increases.

uch larger portion of the transmission system and in some cases affects a higher number of customers. This project will complete replacement of four Pennsylvania circuit breakers on NS Power’s system. Summary of Related CIs +/- 2 years: Pu...

AI summary The document discusses the replacement of Pennsylvania circuit breakers on NS Power’s transmission system due to poor performance and reliability concerns. The project is justified based on safety, system reliability, and the unavailability of replacement parts from the original equipment manufacturer. Related capital items and depreciation class information are also provided.

Not Applicable (NA) NR Foundation / Structure (Tower) Discipline Drawings Not Applicable (NA) NR Tower / Structure Location / Spotting Not Applicable (NA) NR Instrument Datasheets Complete (C) NR NR/S P P/C C Electrical Discipline Drawings...

AI summary The project is being submitted as a Class 3 estimate with 97% of deliverables completed. A 10% contingency was selected to account for risks such as overtime work, material costs, and contract cost increases.

NR Tower/Structure Location/Spotting Not Applicable (NA) NR Instrument Datasheets Not Applicable (NA) NR NR/S Electrical Discipline Drawings Complete (C) NR NR S/P P/C C Instrumentation/Control System Discipline Drawings Not Applicable (NA...

AI summary This project is being filed as a Class 3 estimate with 85% of deliverables completed. A 10% contingency was selected to cover risks like equipment replacement, transformer load balancing, and additional tree trimming along service lines.

C C C Data Architecture Complete (C) P P C C C Security Assessment Complete (C) NR P C C C Privacy Impact Assessment Not Applicable (NA) NR Information Systems / Telecommunication Drawings Preliminary (P) NR P Total # Deliverables for this...

AI summary The project is submitted as a Class 3 estimate, with 79% of deliverables completed. A 10% contingency is included to address risks such as foreign currency fluctuations, additional tariffs, resource rate increases, and potential overtime work.

Project Cost Estimate Input Checklist and Maturity Matrix ECC Renewable Dispatch Data Required fields: Estimate Classification Project Name: Intelligent Asset Data Capture & Integration Platform Started or Preliminary Class 5 Class 4 Class...

AI summary The document outlines a project cost estimate input checklist and maturity matrix for the 'Intelligent Asset Data Capture & Integration Platform' project. It includes sections on project scope, location, requirements, technology selection, and planning, with maturity levels and required fields indicated.

t feeders has been fully u lized. In addi on, cable ra ngs for normal and emergency condi ons should be determined by reference to the “Underground Standards Manual”. • Conductors Overhead conductors are considered to be overloaded when th...

AI summary The document outlines procedures for identifying and addressing overloaded equipment on Nova Scotia Power Inc.'s distribution system, referencing specific manuals and criteria for conductor loading, equipment ratings, and economic justification of solutions.

shall be within 110% of their thermally limited ra ngs under the condi on that the System Operator can take ac on within a 10 minute period to reduce load on the element. 3. From normal system condiƟons, for any single conƟngency, steady-s...

AI summary The document outlines technical requirements for system reliability, including voltage limits (90-110% of nominal), fault management provisions, breaker backup for remote transmission, and transformer capacity standards to meet daily load demands under normal conditions and during generation outages.

ence to “C57.91-1995 IEEE Guide for Loading Mineral-Oil-Immersed Transformers”, it is NS Power prac ce to permit the loading of transformers to exceed the nominal or nameplate value. 3. For distribu on load serving transformers to exceed t...

AI summary Nova Scotia Power Inc. outlines transformer loading practices, permitting up to 133% overload for distribution transformers under specific conditions, aligned with IEEE standards. System power transformers have seasonal loading limits (100% in summer, 110% in winter). The document references capital expenditure justification criteria and technical guidelines for transformer management.

391 $ 994,699 $ 887,769 $ 905,525 NPV (CAPEX) $ (79,222,501) Total Redevelopment and Sustaining $ 1,374,842,402 $ 9,673,500 $ 15,210,000 $ 9,609,750 $ 9,909,750 $ 9,200,000 $ 15,497,877 $ 41,726,783 $ 71,511,131 $ 60,515,523 $ 43,010,391 $...

AI summary The text presents financial data including NPV (Net Present Value) calculations for CAPEX, energy value, avoided capacity costs, and total benefits across multiple years. Assumptions include 2% inflation and 190,000 MWh average Mersey production (2015-2024). Key figures highlight redevelopment costs, energy value, and overall NPV outcomes.

Value of Energy $ 1,042,075,305 $ 31,516,066 $ 32,146,388 $ 32,789,315 $ 33,445,102 $ 34,114,004 $ 34,796,284 $ 35,492,210 $ 36,202,054 $ 36,926,095 $ 37,664,617 $ 38,417,909 $ 39,186,267 $ 39,969,993 NPV (Value of Energy) $ 376,550,690 To...

AI summary The text presents financial data on energy value, avoided capacity costs, and total benefits with NPV calculations. It includes assumptions about marginal costs of electricity and capacity, showing increasing costs over time and a negative NPV for redevelopment.

2% Marginal cost of elec $ 214.58 Marginal cost of capacity $ 243.60 Date: December 12, 2025 Page 653 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan Appendix F Page 1 of 55 NS Power The Path to 2030 – 2025 Update...

AI summary NS Power's 2026 Annual Capital Expenditure (ACE) Plan, part of its 'Path to 2030' update, includes cost considerations for electricity and capacity, reflecting marginal costs of $214.58 and $243.60 respectively. The document outlines financial planning for infrastructure and resource management.

1 capacity is required to maintain supply reliability while meeting growing peak demand 2 requirements and replacing firm capacity that will be retired to comply with the 2030 coal phase- 3 out policy requirements. NS Power’s further study...

AI summary NS Power requires 600 MW of fast-acting generation by 2030 to meet growing demand and replace retiring coal capacity, aligning with the 2030 coal phase-out policy and Clean Electricity Regulations (CER). Procurement responsibility shifted to IESO-NS in 2024, as outlined in The Path to 2030 – 2024 Update (M12012).

rged as a consistent outcome 26 across all 2023 Evergreen IRP scenarios. The value of this conversion is supported by the low 27 capital cost (these units already operate on HFO) and the ability for these units to operate in a 28 peaking c...

AI summary The analysis highlights the conversion of existing HFO-operating units to peaking capacity as a consistent outcome across 2023 Evergreen IRP scenarios, citing low capital costs and suitability for net peak demand periods. This aligns with the 2026 ACE Plan Appendix F.

- 13 A small variance in forecast versus actual procured every year is expected. The year over year - 14 trend was driven primarily by new customer growth, fluctuations between new service types (i.e. - 15 residential single-phase vs apart...

AI summary The text explains that small variances between forecasted and actual meter procurement are expected annually, influenced by factors such as customer growth, service type changes, damaged meters, customer opt-in/out, supply chain delays, and inventory maintenance.

7 8 (b) The Atlantic Utilities SAIFI and SAIDI are calculated based on the totals of all Customers, Customer Interruptions, and Customer Hours of Interruption each year of the utilities included in the comparator group. Please refer to the...

AI summary The text discusses the calculation of SAIFI and SAIDI metrics for Atlantic Utilities, using customer interruption data. It also references the 2026 Annual Capital Expenditure (ACE) Plan and NSPI's responses to consumer advocate information requests.

CONFIDENTIAL (Attachment Only) 1 necessary to account for the potential additional costs associated with potential, necessary 1.9 X Winding Voltage 13.2 kV 13.2 1.10 X Winding Connection Wye-gnd Wye-gnd 1.11 X Winding BIL Line End 95 kV 95...

AI summary The text provides technical specifications and compliance details for a transformer, including voltage, winding connections, losses, and adherence to industry standards. It includes cost estimates for load and no-load losses, as well as details about the load tap changer and noise ratings.

REDACTED 2026 ACE Plan CA IR-16 Attachment 2 Page 3 of 7 REDACTED (CONFIDENTIAL INFORMATION REMOVED) 3.0 TRANSFORMER CONSTRUCTION 3.1 Type (i.e. sealed, conservator) Sealed Sealed 3.2 H Winding Material Copper Copper 3.3 X Winding Material...

AI summary The document outlines technical specifications for transformer construction and bushings, including materials, dimensions, and performance metrics. It provides detailed data on transformer components such as winding material, core type, oil type, noise levels, and bushing specifications.

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 NSDoE IR-1 Attachment 1 Page 1 of 1 1 Request IR-1: 6 significant water infiltration issues during execution, an extended construction timeline, 7 additional environmental permitting requirements, and additional archaeology a...

AI summary The 2026 ACE Plan discusses significant challenges in the Marshall Falls Dam Refurbishment project, including water infiltration, extended timelines, environmental permitting, and Mi'kmaq engagement. The project now requires fish and eel passage due to the 2019 Fisheries Act. NS Power will file Authorization to Overspend applications with detailed cost support.

22 1 (d) The 2025 actual investment exceeded the amount forecasted in the 2025 ACE Plan, despite C0068675 TRE6 Parallel Slide HP heater isolations 494,861 0 (494,861) Deferred 2026 C0068691 TRE6 - Boiler Main Stop Valve 148,839 0 (148,839)...

AI summary The text discusses the 2025 actual investment exceeding the forecasted amount in the 2025 ACE Plan, with several projects deferred or cancelled, including boiler valve refurbishments, fire protection upgrades, and electrical replacements, with some deferred to 2026 or 2027.

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 The text discusses the development of the 2026 Annual Capital Expenditure (ACE) Plan, which incorporates considerations for reliability, and customer affordability in planning for the years 2026 to 2030.

NON-CONFIDENTIAL 1 2 (i) The spend profile for 2026 to 2029 for this project is as follows (please note, there 3 is no investment forecast for 2030): 4 5 • 2026 - $177.9M 6 7 • 2027 - $221.1M 8 9 • 2028 - $218.9M 10 11 • 2029 - $7.2M 12 13...

AI summary The document outlines the projected capital spending for a project from 2026 to 2029, with significant investments in 2026, 2027, and 2028, followed by a much lower investment in 2029. It also mentions sustaining capital spending on the existing coal-fired generation fleet, including costs to transition Lingan 1, 3, and 4 to heavy fuel oil and Pt. Tupper to natural gas.

NON-CONFIDENTIAL 1 Request IR-81: 2 3 G04: C0068898 TUC1 IP LP Last Stage Blade Replacement 4 5 Is the manufacturer of the blades based in the United States? 6 7 (a) If not, why has a budget line been estimated for US to Canadian dollar co...

AI summary The document discusses a request regarding the manufacturer of blades for a turbine replacement project. The manufacturer, Ethos, is based in the United States. Due to the urgency of the project and lack of approved Canadian suppliers, NS Power directly approached three vendors, with Ethos being the only one to provide a quote meeting the expedited delivery requirements.

To minimize operating costs, only one of the Bridgewater transformers is energized at any given time. Typically, 99W-T61 would be energized for 6 months of the year, and 99W-T62 would be energized for the remaining 6 months, thereby saving...

AI summary The Bridgewater transformers are operated in a staggered manner to reduce costs, with one energized for six months and the other for the remaining six months. This strategy saves approximately $10,000 annually in operating costs. The sub-transmission system serves multiple sub-stations, with contingency support available from the Westhavers Elbow transformer.

Factors Relevant to Report: - 1. There is presently a capacity criteria violation on Circuit 89W-301 during periods of peak load. - 2. The Bridgewater Planning and Development office has identified the following projects planned for the to...

AI summary The text outlines current capacity issues on Circuit 89W-301 during peak load periods and details planned development projects in Bridgewater, including a Walmart complex, hotel, apartment buildings, and other infrastructure. It also references a 3 MVA reserve on Auburndale feeder circuit 73W-412 for the Michelin Bridgewater site.

Relevant Information: The load history shown in Figure 4 reflects the following: - 4kV load on 70W-203 and 70W-204 has remained fairly constant since 1995 (this will slowly be decreased as opportunities arise to convert 4kV to 12kV). - 2.6...

AI summary The text provides a historical overview of load changes on various feeder circuits in the Bridgewater East area, including load transfers and reconfigurations over time. It highlights how load has been redistributed between different circuits since 1995.

Relevant Information: - 1. The historical growth rate for the Auburndale feeder circuits (25kV) was found to be 1.27% per year. - 2. The Auburndale feeder circuit 73W-412 maintains a 3 MVA reserve for the Michelin Bridgewater site. This re...

AI summary The text provides technical details on the Auburndale feeder circuits and transformer, including historical growth rates, reserve capacity, and cooling provisions. It also references a redacted 2026 ACE Plan and includes a figure related to load forecasting for the High Street sub-station.

Assumptions: - 1. The peak feeder loading for 73W occurs during the Winter months, so that the substation transformer 73W-T1 can be loaded to 133% of its top nameplate rating before being considered to be in an overloaded condition. - 2. T...

AI summary The document outlines assumptions related to the capacity limitations and load forecast for the Auburndale and Bridgewater East sub-stations, highlighting potential overloading issues and the impact of growth rates on future capacity needs.

.1 Capacity Criteria Violation at Bridgewater East (2003) There is presently a capacity criteria violation at the Bridgewater East Sub-station during periods of peak load. The recorded 2002/03 Winter peak was 17.2 MVA, which is 154% of the...

AI summary A capacity criteria violation exists at the Bridgewater East Sub-station due to peak load exceeding transformer ratings. Load has been shifted to other substations, but further offloading is hindered by infrastructure failures. Additional load from new developments is expected, necessitating transformer upgrades.

Qualitative Analysis 70W: Adding a transformer at Sub-station 70W would place additional capacity as near to the geographic load centre of Bridgwater as possible, and would therefore lower costs associated with system losses. The distribut...

AI summary The document evaluates two transformer upgrade options at Sub-stations 70W and 89W in Bridgwater. Adding a transformer at 70W would reduce system losses but require additional infrastructure for long-term growth. Replacing the transformer at 89W is considered a less costly and less disruptive solution, despite being further from the load centre.

.3 Capacity Criteria Violation at Auburndale (2010) The Auburndale sub-station is presently supplying approximately 11 MVA of industrial and residential (rural) load at the 25kV voltage level via Transformer 73W-T1. This load has a winter...

AI summary The Auburndale sub-station transformer is currently supplying 11 MVA of load and must reserve 3 MVA for a backup to the Michelin Bridgewater Plant, limiting its capacity to 11.9 MVA. With a 1.3% annual load growth rate, the transformer is projected to exceed this capacity limit by 2010.

Solution: 73W-T1 has provision for an additional fan kit that would raise its' top rating to 14 MVA. This would allow the Auburndale transformer to be loaded to 15.9 MVA (14 MVA x 1.33 - 3MVA Reserve = 15.9 MVA) before again being consider...

AI summary The 73W-T1 transformer can be upgraded with a fan kit to increase its capacity to 14 MVA, allowing the Auburndale transformer to handle up to 15.9 MVA before being considered overloaded. However, the addition of a new industrial customer with a peak load over 750kVA in the Bridgewater Industrial Park would necessitate the installation of the fan kit.

Solution: The creation of a new circuit at 89W in 2010 will permit the offloading of circuit 70W-322 by 2-3 MVA, which will defer the need for additional capacity at High Street for an additional 4 years. REDACTED 2026 ACE Plan NSEB IR-116...

AI summary A new circuit created in 2010 at 89W allows for the offloading of circuit 70W-322 by 2-3 MVA, delaying the need for additional capacity at High Street for four more years.

Add Capacity to 70W and Offload 89W This option requires a second transformer at 70W to offload 89W circuits. This location has a HV bus, switch, transformer pad, and low voltage bus already in place, although two of the bays in the LV bus...

AI summary This section outlines the plan to add capacity at 70W by installing a new transformer and reconfiguring existing circuits to offload 89W. It includes upgrading distribution lines, replacing a failed submarine cable, and modifying circuits to serve new developments and redistribute load.

2026 Annual Capital Expenditure (ACE) Plan (NSEB M12619) NSPI Responses to NSEB Information Requests 1 criticality score reflects environmental sensitivity, station configuration, and potential 13 compromised, resulting in mineral oil impa...

AI summary The text discusses environmental concerns related to a transformer pad and oil containment system, including mineral oil impacts and repairs. NSP retained Strum Consulting to conduct an environmental site assessment, with ongoing work since August 2024.

Request IR-4: 1 Request IR-2: 9 10 11 12 13 14 15 Review this document against the Project Description, including the contingency statement to ensure that all risks are properly considered when applying a contingency percentage. Discuss wi...

AI summary The document includes a request to review projects in the Application against the Project Description and contingency statement, ensuring risks are properly considered. It asks for examples of projects with risks handled via contingency, projects with high-risk occurrences, projects affected by NS Power's PDM changes, excluded projects, and past ACE Plans with non-compliant projects.

(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 Regular Administrative Overhead (Labour AO) and how Grid Modernization Programs, such as FLISR, improve system reliability and efficiency without increasing physical capacity. It also includes questions about grid modernization investments and their impact on transmission and distribution capacity.

1 2 3 2. Direct NS Power to provide a report on whether the Maximo/Salesforce capabilities could be extended to improve operational efficiency and cost minimization in areas where it is not currently scoped for use. (Section III.A) 4 5 3....

AI summary The document outlines various directives for NS Power, including improving operational efficiency through software capabilities, revising work orders, monitoring external cost factors, managing contingency amounts, and revising the CEJC to align with the Board's requirements. It also addresses reliability metrics and spare equipment inventory.

Q: What is your recommendation regarding spare inventory pooling? - A: The Board should obtain an inventory of NS Power's spare equipment to identify whether there is sufficient volume to consider whether a more cost-effective option could...

AI summary The respondent recommends that the Board obtain an inventory of NS Power's spare equipment to assess the feasibility of a spare inventory pooling program. Key considerations include equipment type, storage costs, and exclusion of routinely rotated items. If beneficial, the Board should request NS Power to report on the topic in its next ACE Plan application.

from Maritime Link transmission project. Regional joint dispatch. Accounting issues related to coal supplies and wind farm tax credits. Impact of demand response and time-varying rates on fuel costs. Nova Scotia UARB Matter No. M11009, dir...

AI summary The text discusses expert testimony related to the Maritime Link transmission project, capital expenditure plans, and the retirement of fossil fuel generation units. Topics include regulatory processes, cost recovery, demand response, and reliability investments. Matters referenced include Nova Scotia UARB M11009 and M11017, as well as Kentucky PSC Case No. 2022-00402.

50050555 1445000 404 222 H + 5 H + B 5 H + 1 247.556 10 004 705 on the Mersey Hydro system.

AI summary This document text contains a line item with a number, a series of codes and values, and a reference to the Mersey Hydro system. The context of the line item is unclear, but it appears to be related to a regulatory proceeding in Nova Scotia.

DATE FILED: April 8, 2026 Page 4 of 19 1 2.0 RESPONSE TO CA (WILSON) EVIDENCE 22 projects, for example). For repetitive work that has consistent, well understood risks, the 23 contingency percentage applied should solely be based on the le...

AI summary The document discusses NS Power's disagreement with a recommendation to file a risk matrix for projects with contingency over 10%, arguing that such matrices are unnecessary for well-understood risks and that they are already accounted for in project management practices.

le update reports every six months, beginning October 1, 2026. Accordingly, a structured process will commence in the coming months to evaluate the future of the MHS and other hydro facilities. This work will also benefit from the outcomes...

AI summary The Wilson Evidence expresses concern about NS Power's lack of a clear plan for managing potential redevelopment or decommissioning of the Mersey Hydro project, while acknowledging the necessity of current sustaining capital investments to ensure safe operations. NS Power is deferring long-term decisions and focusing on maintaining the facility's current state.

The Reliability Gap - NSPI submits that a significant portion of this spending falls under the rubric of 'reliability.' - Yet the record shows a disconnect between spending and performance, as despite years - of aggressive reliability inve...

AI summary NSPI argues that a significant portion of its spending falls under 'reliability,' but the Department points out a disconnect between spending and performance, as reliability targets have not been met since 2016. NSPI's reliability plan lacks specific performance targets, and the Department criticizes the lack of measurable improvements and poor asset management practices.

FOR PETROLEUM IMPACTED SITES IN ATLANTIC CANADA Pha III E SA Rep ort, Se ctio n 5 .4 se S001 10645 POT - Routine Equipment Replacement 202,363 227,451 990,578 223,262 10673 TRE - Routine Equipment Replacement 523,902 385,427 464,408 322,17...

AI summary The document presents a detailed table with various entries related to routine equipment replacement, roofing, and heat rate routines for different sites, including costs and figures for multiple years. The data includes various entities and project codes, indicating ongoing maintenance and replacement activities.

h as D005 (Unplanned Replacements of Deteriorated Equipment) but considered that overtime should nevertheless be tracked and that different considerations apply to work that can be planned in advance: For example, the forecast overtime lab...

AI summary The text discusses the tracking of overtime labour in distribution routines and regulatory replacements, noting that NS Power has detailed labour tracking systems in place. It also highlights efficiencies achieved through Work Management and Scheduling and Dispatch implementations, such as depot splitting and service days, which reduce travel costs.

2.3.6.1 Findings [76] The Board accepts NS Power's position. The evidence does not establish that its existing spare equipment strategy is unreasonable, ineffective or that participation in an existing pooling arrangement would produce low...

AI summary The Board accepts NS Power's position that its existing spare equipment strategy is reasonable and effective, and participation in a pooling arrangement would not necessarily lead to lower costs without negatively impacting reliability.

ed approach, with a materiality threshold of twice the project ATO threshold. Therefore, the Board accepts NS Power's proposed definition for a project Scope Change, but also directs as set out below. [118] Upon identifying a change to pro...

AI summary The Board accepts NS Power's definition of a project Scope Change but requires a notification letter when changes may increase the budget above twice the ATO threshold. The letter must include details of the change, estimated budget impact, and any alternatives considered.

4.0 FIVE-YEAR RELIABILITY PLAN [120] In response to ongoing concerns and Board directives in the 2024 ACE Plan Decision, NS Power submitted a Five-Year Reliability Plan as Exhibit N-3 in the 2025 ACE Plan . In this Plan, the Company outlin...

AI summary NS Power submitted a Five-Year Reliability Plan in response to the 2024 ACE Plan Decision, proposing a $1.3 billion investment from 2025-2029 to improve customer reliability and reduce SAIDI by 20%. The Board directed NS Power to provide annual updates and consider new reliability metrics in the 2026 ACE Plan.

4.1 Findings [150] The Board agrees that vegetation management, system hardening and grid modernization are recognized tools for reliability improvements. It is on this basis, and an assessment of the individual merits of each project subm...

AI summary The Board acknowledges the importance of vegetation management and grid modernization but is concerned about the lack of demonstrated reliability improvements despite significant spending. It questions whether the investments are providing value for ratepayers and emphasizes the need for a clearer connection between expenditures and reliability outcomes.

material concerns regarding the fiscal capacity of ratepayers to absorb such aggressive asset loading without a corresponding expansion of physical system benefits. [DOE Closing Submissions, pp. 3-4] [165] The Board is also concerned about...

AI summary The document discusses concerns about the impact of increased capital spending on ratepayers, noting that NS Power has faced challenges in transitioning from coal-based generation to renewable energy sources. This transition, driven by decarbonization goals set under the Electricity Act, has been costly and has placed additional stress on existing coal plants.

- 1. NS Power will provide Designated Confidential Information, as defined herein, to the Designated Recipient as defined in the undertaking to which this schedule is attached. - 2. Designated Confidential Information shall consist of mate...

AI summary NS Power outlines the types of information designated as confidential in its 2026 ACE Plan filing, including engineering studies, commercial quotations, and proprietary third-party information, which are confirmed as confidential by the Nova Scotia Energy Board.

Request IR-73: - Page 154 states: "The contingency also covers any additional precautions that will need to be - exercised based on feedback from governing authorities, such as the Department of Fisheries, or - Transport Canada." - a) Plea...

AI summary The text requests clarification on additional precautions covered by the project contingency, including why these costs are included in contingency rather than base construction estimates, and whether archaeological findings are considered in the Class estimate and contingency.

Request IR-74: - Page 8 of Attachment 1 (page 165) states: "It is important to note that information on the site, - such as existing geotechnical conditions, seabed bathymetry, and environmental conditions, is - extremely limited. The opti...

AI summary The text raises questions about whether investigative work related to geotechnical, seabed bathymetry, and environmental conditions has been completed, and if not, why. It also asks for details on any completed work and mitigative measures incorporated into the design.

Request IR-75: Combi-Wall Option: Pages 166 to 175 state: "Since these soil parameters are currently unknown, conservative assumptions have been made in the conceptual design. It is recommended to complete a geotechnical investigation prog...

AI summary The text requests confirmation of whether a geotechnical investigation was completed during the detailed design process for the Combi-Wall Option and whether the findings were used to update cost estimates. It also asks for an explanation if the investigation was not completed or if the findings were not used.

Request IR-77: - In reference to the Rock Revetment Option, page 172 states: "A geotechnical field investigation and slope stability analysis will be required to confirm the geometry of the slope and if any dredging is required prior to in...

AI summary The document requests confirmation of whether a geotechnical investigation was conducted for the Rock Revetment Option and whether the findings were used to update assumptions and cost estimates for the project.

Request IR-108: - Please provide the forecast annual operations and maintenance cost associated with the CT- - BGT2 unit for each year from 2026 up to and including 2030.

AI summary The request asks for the forecasted annual operations and maintenance costs for the CT-BGT2 unit from 2026 to 2030.

Request IR-123: - Page 383 of the application notes that the existing 76W-T1 69-4.16kV, 3.75/5 MVA transformer - will be replaced with a 69-13.2/4.16kV, 5/6.66 MVA unit. The low voltage equipment, owned by - the Town of Mahone Bay but oper...

AI summary The document outlines the replacement of a transformer in Mahone Bay, Nova Scotia, with a higher capacity unit to accommodate future load growth and system upgrades. It also requests detailed information on the project, including installation date, load growth projections, cost differences, and supporting studies.

Request IR-128: - Since 2016, for primary overhead distribution lines that have had vegetation management under - the Program, please provide the yearly data for the following in an Excel sheet, where applicable: - a) A breakdown of total...

AI summary Request IR-128 asks for detailed data on vegetation management for primary overhead distribution lines since 2016, including line breakdowns, outage causes, work-completion percentages based on risk classifications, and annual storm budget costs related to vegetation management.

r’s response to Board IR-1 in M12319, it was indicated that the sustained increase is a result of a higher-than-expected volume of reactive power outages due to asset failures and deteriorated assets. 1. Please provide the number of outage...

AI summary The document outlines requests for information related to outages, capital expenditures, and budget variances. It also includes a request for an explanation of a budget increase for regulatory replacements and planned equipment replacements.

to be replaced, can already purchased replacement parts be returned for no additional cost to the project? Please explain. 1. If not, why not? G03: C0021608 TUC Shoreline Sheetpile Refurbishment 1. NS Power indicates that this investment o...

AI summary The text discusses the replacement of steel sheet pile structures at the Tufts Cove Generating Station, highlighting corrosion issues and the need for intervention to prevent structural risks. It also asks about the 50-year life of the investment and the planned maintenance schedule for the sloped rock revetment.

rom the regulatory authorities? 1. If not, does NS Power have an expected date by which all required permits will be approved? 2. If so, what is the expected start date for project construction? Page 154 states: “The contingency also cover...

AI summary The text raises questions about NS Power's permitting process, the inclusion of contingency costs, and the status of investigative work for a project. It also discusses the need for geotechnical investigations to reduce uncertainty in design assumptions and potential cost savings.

certainty of these soil parameters. As design progresses and the soil conditions are better understood, it is possible that these assumptions may be relaxed, resulting in lower overall project costs.” 1. Please confirm that a geotechnical...

AI summary The text discusses the need for a geotechnical investigation to confirm soil parameters and update cost estimates for the combi-wall option. It also highlights the structural reliance on existing SSP cells for the concrete encapsulation option and the potential need for reinforcement.

risks noted in the application? 9. Have there been any significant leaks that required regulatory reporting? If yes, please share the report. T07: C0068969, 2026 Pennsylvania Breaker Replacements 1. How did the utility determine that the f...

AI summary The text includes questions about risks in an application, leaks requiring regulatory reporting, and details about circuit breaker replacements and distribution capital investments. It also references a vegetation management program launched in 2016 following a 2014 storm review.

ubmittal, CI# 49595 HYD – TUS 1 Overhaul. 1. How does this project connect or interact with the ongoing Tusket project, which is currently before the Board as an Application to Overspend in M10197? Please refer to the Application Page 35 o...

AI summary The document outlines questions regarding the connection between the Tusket project and previous applications, the status of customer surveys on Value of Lost Load (VoLL), and the evaluation of customer-centric metrics by NS Power. It references specific pages and figures in the application for further details.

- 29 (ii) its interfaces with the "broader Energy Delivery team" and 30 "Enterprise Asset Management (EAM) team"; and 1 (iii) accountability (role/title) for vegetation management, feeder 2 inspection, transmission line inspection, capital...

AI summary The document outlines requests for information related to accountability roles in vegetation management, reliability-based project evaluation metrics, and storm performance updates. It references the 2026 ACE Plan and seeks details on reliability metrics used by other utilities.

s and Replacements. Preamble: NSPI has confirmed that the forecasting for D008 - Provincial Storm Routine Spending is derived from a 5-year historical average, excluding “Extreme Event Day storms”. Please provide the 5-year historical data...

AI summary NSPI has used a 5-year historical average (excluding 'Extreme Event Day storms') to forecast D008 Provincial Storm spending for 2026. The request includes providing the dataset, identifying excluded storms, and the quantitative impact of exclusions. The Reliability Team's role in asset management and collaboration with other teams is also discussed.

34 Request IR-15: 35 36 With respect to Appendix I, CIs for transmission replacement and upgrade projects C0080110 and 37 C0080109, and 2024 ACE Plan Rebuttal Evidence (p. 22): 38 39 (a) Please confirm that NS Power's policy remains, "In t...

AI summary The proceeding requests Nova Scotia Power to confirm its policy on risk registers for transmission projects, explain the absence of risk registers for projects over budget, and justify the use of contingency budgets over ATO filings. It also asks about the impact of increased replacement structures on procurement and the Board's concerns regarding contingency amounts.

1. Please confirm that NS Power’s policy remains, “In the case of Transmission Replacement and Upgrade projects, the project risks and their potential impacts are well understood by the project team, therefore having a risk register for ea...

AI summary The text consists of a series of questions directed at NS Power regarding its risk management practices, budgeting mechanisms, and project management for transmission replacement and upgrade projects. Specific focus is on risk registers, contingency budgets, and the impact of changes in project scope on procurement and scheduling.

decision in M12417, it stated that, “the Board remains concerned about the amount of contingency included in transmission line replacement and upgrade projects submitted for Board approval.” Please explain why it would be unreasonable for...

AI summary The Board has expressed concerns about the contingency amounts in transmission line projects and is requesting explanations and additional information regarding specific projects, including cost support references, firm quotes, and project schedules.

ghts; and 4. External factors driving costs, including supply chain issues, shifts in the regular/overtime labour breakdown due to other utility programs. 2. In the referenced RIR, NS Power stated: NS Power has data on single-family and mu...

AI summary The text discusses NS Power's data tracking challenges, specifically regarding residential additions and internal work orders. It requests information on changes to work orders since 2025, updates on a continuous improvement initiative, and plans for future system upgrades.

please identify the jurisdiction, the applicable cap, and whether the cap applies generally or only in the absence of a risk matrix. Reference: Exhibit N-9, Evidence of John D. Wilson, pages 21 – 24. Preamble: Mr. Wilson reviewed NSPI’s pr...

AI summary Mr. John D. Wilson discusses concerns with NSPI’s proposed scope change, noting significant ambiguity and suggesting a two-step process for filing changes that may exceed a Board-specified threshold. The process includes submitting a letter with details on the change, budget impact, alternatives, and plans for revised applications.

s based on anecdotal information as opposed to verifiable tracking. Continued use of this estimate certainly poses some difficulty in assessing whether the reliability plan investments are worthwhile. With respect to reliability-related pr...

AI summary The Consumer Advocate suggests that NS Power should provide a fuller inventory of spare parts to assess the cost-effectiveness of spare inventory pooling, despite NS Power's claim that it has already evaluated and rejected such arrangements. The Consumer Advocate argues that market conditions may have changed since 2024 and that this information could help assess the cost-effectiveness of pooling programs.

B. Asset Growth vs. Declining Generation & Stagnant Capacity The most significant concern regarding NS Power's long-term capital strategy is the apparent divergence between growth in the utility's asset base and the underlying evolution of...

AI summary The document highlights a growing mismatch between NS Power's asset growth and declining generation capacity and stagnant energy sales. Key indicators show a significant drop in internal generation contribution and capacity utilization, while total assets have grown steadily. This raises concerns about whether ratepayers are receiving value for these investments and suggests the need for better alignment between capital expenditures and actual system needs.

Transmission Projects - The Transmission portfolio reflects a pattern of increasing project scope tied to substation modernization, system reinforcement, and right-of-way expansion. - 138KV-25KV Substation Stellarton: Increased from approx...

AI summary The Transmission portfolio has seen significant cost escalations for various projects, including substation modernization and right-of-way expansion, indicating broader scope and complexity than initially planned.

ng customer type, service characteristics (e.g., voltage, phase), and external cost drivers. The CA also questions whether NS Power's current forecasting methodology is sufficiently tested over time. Transcript, pages 68-69. DATE FILED: Ju...

AI summary The Consumer Advocate (CA) supports NS Power's 2026 ACE Plan but questions the cost-effectiveness of the Five-Year Reliability Plan and NS Power's forecasting methodology. NS Power defends its current systems and processes, emphasizing the use of WAM systems for tracking and efficiency, and asserts that an equivalent Basis of Schedule approach is not feasible for routine work.

5.2.1 Capacity Underutilization DOE submits that the Annual Capacity Factor of NS Power-owned thermal facilities has dropped from an operational peak of 85% (2008) to below 50% (2023), indicating lower utilization levels over time. Effecti...

AI summary The DOE argues that the capacity factor of NS Power's thermal plants has decreased significantly, but NS Power clarifies that utilization is measured using a more comprehensive Unit Utilization Factor, which accounts for operating hours, starts, and flexibility. This factor shows that utilization has not dropped significantly, and sustained capital investment is needed to maintain grid reliability.

2.3.4.1 Findings [64] The Board accepts that the formal Basis of Schedule process should not be imposed on all routine activities. However, the Board agrees with the underlying objective of the CA's recommendation. For planned routines inv...

AI summary The Board acknowledges that the formal Basis of Schedule process should not apply to all routine activities but supports the objective of ensuring proper planning and minimizing avoidable costs for significant routines. It suggests that NS Power's existing Work Management and Scheduling systems can achieve this goal effectively.

2.3.6.1 Findings [76] The Board accepts NS Power's position. The evidence does not establish that its existing spare equipment strategy is unreasonable, ineffective or that participation in an existing pooling arrangement would produce low...

AI summary The Board accepts NS Power's position that its existing spare equipment strategy is reasonable and effective, and that participation in a pooling arrangement would not necessarily lower costs without adversely affecting reliability.

ed approach, with a materiality threshold of twice the project ATO threshold. Therefore, the Board accepts NS Power's proposed definition for a project Scope Change, but also directs as set out below. [118] Upon identifying a change to pro...

AI summary The NSEB accepts NS Power's definition for a project Scope Change but requires a notification letter if changes may increase the budget above twice the project ATO threshold. The letter must include details of the change, estimated budget increase, and any alternatives considered.

2027 ACE Plan . - 10. The Board directs NS Power, to the extent feasible and possible, to engage and coordinate with the IESO Nova Scotia and report on that coordination in future ACE Plan filings. - 11. The Board directs NS Power to provi...

AI summary The Board has directed NS Power to provide various updates and analyses in the 2027 ACE Plan, including coordination with the IESO, updates on the Mersey Redevelopment Project, monitoring of upgraded wooden poles, and a rate impact analysis. Specific requirements are outlined for IT and cyber-related capital applications.

I N D E X O F P R O C E E D I N G S April 21, 2026 PAGE NO. 2 percent; and generation, 6 percent. However, this level 3 of investment has not delivered corresponding actual 4 growth in generation capacity, renewable energy 5 transmission,...

AI summary The document discusses concerns about Nova Scotia Power Incorporated's (NSPI) capital expansion and reliability investments, noting that despite significant spending, there has been little growth in generation capacity or system resiliency. NSPI's rate base and earnings have increased, but performance indicators have not met targets since 2016.

NS POWER PANEL 95 Cr-ex, (Murphy) 1 have the ability to properly mitigate those risks in your 2 planning? 3 A. (Beaton) So we do mitigate the 4 risks in our planning, but the nature of the work, certain 5 risks cannot be schedules being li...

AI summary The discussion revolves around risk mitigation in project planning, particularly highlighting the challenges of scheduling and the use of LIDAR data. The speaker acknowledges past issues with ATOs due to incomplete data but notes improvements in forecasting and the use of a 15% contingency for projects.

NS POWER PANEL 537 Questions, (Chair) 1 You know, our primary concern and 2 focus is to ensure there's adequate capacity on the 3 system. As the utility, we want to make sure the lights 4 stay on. So we would certainly not retire a unit or...

AI summary The discussion focuses on NS Power's concerns about maintaining adequate system capacity and retiring coal units by 2030. The utility emphasizes the importance of fuel switching and the potential impact of federal and provincial discussions on coal use beyond 2030. There is also mention of the need to avoid stranded capital if coal conversions are not necessary.