Topic:"Asset Management" in M12619

. 3 4 Figure 5: Breakdown of Capital Forecast by Investment Type 5 (Millions of Dollars) Investment Type 2026 2027 2028 2029 2030 Generation Reliability 178.2 211.6 229.8 207.2 184.9 T&D Reliability 234.9 247.9 256.0 281.7 244.9 New Custom...

AI summary The document presents a breakdown of capital forecasts by investment type for the years 2026 to 2030, including categories such as Generation Reliability, T&D Reliability, New Customer, Core, and ECEI initiatives. It also introduces NS Power’s Asset Management Mechanism, which is used for risk-informed decision-making as part of the Strategic Asset Management Plan.

82 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan CONFIDENTIAL (Attachments Only) 1 mitigation strategies, ensuring alignment with NS Power’s operational mission and delivering the 2 greatest value to customers. 3 4 A c...

AI summary The 2026 ACE Plan outlines mitigation strategies for high-risk assets based on criticality and condition, emphasizing the importance of aligning with NS Power’s operational mission and delivering value to customers. Mitigation approaches include capital investment, refurbishment, and modifications to maintenance practices, with a focus on affordability and feasibility.

tuitive and formalized methods (e.g., FMECA) to assess Date: December 12, 2025 Page 18 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan CONFIDENTIAL (Attachments Only) 1 criticality, particularly for new or complex...

AI summary The 2026 ACE Plan discusses the evaluation of asset criticality and condition using the Capital Expenditure Justification Criteria (CEJC). It outlines a risk-based methodology for assessing asset health and prioritizing investments based on risk ratings and other factors such as customer affordability and regulatory context.

ration investment by investment 18 type. 19 Date: December 12, 2025 Page 40 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan CONFIDENTIAL (Attachments Only) 1 Figure 14: 2026 Thermal Investment by Investment Type 2...

AI summary The 2026 ACE Plan outlines NS Power’s investment in generation, including both traditional and renewable sources. Investments are guided by asset management and the Capital Expenditure Justification Criteria (CEJC).

Right-of-Way Widening 128.9 ECEI 7.2 3 3.3 4 5 Transmission investment is guided by NS Power’s Asset Management mechanism and the Capital 6 Expenditure Justification Criteria (CEJC). Asset condition and criticality are evaluated using the...

AI summary The document outlines NS Power’s transmission investment strategy, guided by its Asset Management mechanism and Capital Expenditure Justification Criteria (CEJC). It emphasizes reliability, customer growth, and compliance with environmental obligations, including the Clean Power Plan, which aims for 80% renewable electricity by 2030. Investments in the Eastern Clean Energy Initiative (ECEI) and battery storage are highlighted.

criticality and condition inputs. Specifically for distribution feeders, the criticality assessment 28 includes factors such as usage (kWh sales), regulatory consequences, customer count, redundancy, 29 and ease of access. The condition sc...

AI summary The text outlines the methodology for assessing the criticality and condition of distribution feeders, incorporating factors like usage, regulatory consequences, and customer count. It references specific regulatory decisions and documents related to the 2026 Annual Capital Expenditure Plan.

1 Plans for Replacement of Aging Energy Delivery Equipment & Storm Performance 2 3 The 2015 ACE Plan Terms of Consensus included two commitments with respect to reliability: 4 5 (4) As part of the reliability directive in future ACE Plans,...

AI summary The 2015 ACE Plan Terms of Consensus required NS Power to provide more detailed information on its plans for replacing aging transmission and distribution equipment, including asset descriptions, strategic goals, and inspection data, as recommended by the SBA's consultant, Mary Neal.

erformance 24 degradation, or other factors, and 25 • Any recent, relevant inspection data” 26 27 (5) As part of the reliability directive in future ACE Plans, NS Power will 28 provide an update on its storm performance and related capital...

AI summary The document references the 2026 ACE Plan and discusses NS Power's commitment to improving storm performance through capital investment strategies. It also mentions the Terms of Consensus approved by the Board in 2015 and NS Power's ongoing asset management practices to monitor and replace aging transmission and distribution equipment.

1 level aimed at providing safe and reliable service, while ensuring affordability. To sustain or 2 improve reliability performance, NS Power follows its asset management principles to prioritize 3 investments in Energy Delivery equipment...

AI summary NS Power prioritizes capital investments in Energy Delivery equipment based on asset management principles, risk ratings, and asset condition to ensure safe, reliable, and affordable service. Replacement decisions are guided by asset age, performance degradation, and system reliability.

ce is increased, the availability 23 of replacement parts or critical spares is limited, or performance is negatively impacted. This 24 information can be used to inform project prioritization. However, age profiles are used in concert 25...

AI summary The document discusses NS Power's approach to asset replacement, emphasizing the use of age profiles alongside asset condition and performance in investment decisions. It outlines the creation of a framework in 2014 to prioritize Energy Delivery assets for replacement based on risk ratings and criticality.

455 45 10 55 8 Substation Transformer 445 50 9 60 7 10 11 Age demographics information is presently not available for all transmission and distribution asset 12 classes. Substation transformers, substation breakers, transmission conductor,...

AI summary The text discusses the lack of age demographics data for certain transmission and distribution asset classes, noting that data is available for substation transformers, substation breakers, transmission conductor, downline reclosers, and padmount transformers. It also references the 2026 ACE Plan, which is marked as confidential.

REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan CONFIDENTIAL (Attachments Only) 1 asset information improves for individual asset classes, their age profiles provide a more complete 2 picture of the current state across...

AI summary The document discusses the 2026 Annual Capital Expenditure (ACE) Plan, focusing on the replacement and upgrading of aging energy delivery infrastructure, particularly substation transformers. It highlights that asset age is not the sole factor in determining replacement needs, as reliability, condition, and technological advancements also play a role.

30 20 10 0 Age Group 2 3 4 • Expected useful life of 50-60 years depending on the transformer type, utilization, and 5 environmental conditions. 6 7 • Age Demographics – 43.8 percent of Transformers are beyond 50 years of service and 28.3...

AI summary The document discusses the aging of transformers in the electrical grid, noting that 43.8% are over 50 years old and 28.3% over 60 years old. It estimates annual replacements at 7-9 units and highlights that proposed 2026 investments will increase the proportion of aging transformers. Proactive replacement strategies and programs like the transformer spares and mobile substation programs are planned.

bile substation program is planned. Proactive 19 transformer replacements in future years will again focus on the overall condition of each Date: December 12, 2025 Page 123 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 A...

AI summary The document discusses the 2026 ACE Plan, highlighting proactive transformer replacements based on asset condition and system criticality, with a focus on substation transformers and breakers. It includes a figure illustrating the age profile of substation transformers between 2025 and 2026.

breaker spares program is planned. Figure 80 illustrates the overall change in asset age 19 profile for Substation Breakers between 2025 and 2026. Date: December 12, 2025 Page 125 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED)...

AI summary The document discusses the 2026 ACE Plan, including figures that illustrate the age profile of substation breakers and transmission conductors between 2025 and 2026. It mentions a breaker spares program and provides data on asset aging for infrastructure components.

300 200 100 0 Age Group 2 3 4 • Expected useful life of 55-65 years depending on the conductor design and environmental 5 conditions. 6 7 • Age Demographics – 36.6 percent of conductor is beyond 55 years of service and 16.3 8 percent beyon...

AI summary The document discusses the aging of transmission conductor assets, noting that 36.6% of conductor is beyond 55 years of service and 16.3% beyond 65 years. The expected useful life is 55-65 years, with a projected increase in the number of assets beyond these ages due to planned capital investments in 2026.

80 60 40 20 0 Age Group 2 3 4 • Expected useful life of 30-40 years depending on the downline recloser design, loading, 5 and environmental conditions. 6 7 • Age Demographics – 23.9 percent of Downline Reclosers are beyond 30 years of serv...

AI summary The document discusses the expected useful life of downline reclosers, their current age distribution, and the impact of planned capital investments on their age profile. It estimates annual replacement needs and highlights the continuation of a spares program to mitigate risks.

400 300 200 100 0 Age Group 2 3 4 11.1.5 Strategic Asset Management Plan (SAMP) 5 6 The Board’s letter dated July 8, 2025 pertaining to its inquiry into NS Power’s Property and Assets 7 provided the following directive: 8 9 The Board direc...

AI summary The Nova Scotia Energy Board (NSEB) has directed NS Power to annually confirm and file revisions to its Strategic Asset Management Plan (SAMP) in the Annual Capital Expenditure (ACE) Plan filings. A minor revision to the SAMP is expected by December 31, 2026, and a formal review is required by December 31, 2029.

2026 ACE Plan C0080206 Page 2 of 5 JUSTIFICATION: Justification Criteria: Thermal Sub Criteria: Equipment Replacement/ Refurbishment Why do this project? NS Power conducts condition and risk assessment and analysis based on the annual boil...

AI summary NS Power is proposing the replacement of boiler components such as tubes, tube shielding, and tube locks to enhance system reliability, mitigate the risk of unplanned outages, and ensure safe and cost-effective operation. The project is necessary due to the increased risk of failures from degraded components and the potential for higher costs from emergency repairs.

sk through Asset Management Methodology. This approach ensures continued reliability, mitigates the risk of unplanned failures, and supports long-term asset performance. Why do this project this way? The selection of refractory materials a...

AI summary The document outlines the methodology for asset management, emphasizing the importance of refractory material selection and installation practices at the Point Aconi facility. It highlights the necessity of full refractory replacement to ensure system integrity and long-term performance, and explains the contingency planning based on expert judgment and non-binding guidelines.

REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan C0021608 Attachment 1 Page 3 of 34 C. Lebans Page 3 The remainder of the SSP wall in this area has been largely untouched and was observed during a condition assessment in October 2...

AI summary The document discusses the poor condition of an SSP wall in a coastal area, noting corrosion due to seawater exposure. An inspection in October 2022 identified the need for remediation to ensure structural stability. Corrosion is particularly severe in the splash zone and around low water areas.

have no capacity for any significant loading acting on the top portion of the cells where the corrosion is the greatest, and the remainder of the cell below the mid tide zone has compromised capacity. It should be noted that while most sev...

AI summary The document discusses corrosion issues on the SSP circular cell wall, noting significant corrosion on the seaward face and potential corrosion in the buried portion. CBCL has proposed three remediation options with concept drawings and cost estimates, though detailed design is required due to limited site information.

ministic life assessment • Low-speed balance rotor to 4W/N after all work is completed. • Perform a rotor shipping inspection after all work has been completed. • Prepare the rotor for shipment back to the customer’s site, light oil applie...

AI summary The document outlines the steps involved in the maintenance and repair of a DFLP turbine rotor, including inspection, cleaning, and replacement of L-0 blades. It details the process from receiving the rotor to preparing it for shipment back to the customer.

ware as the environment adjacent to saltwater is known to be corrosive. Core sample analysis revealed extensive multi-dimensional cracking, with some extending through the full thickness of the stack. The inspection report (please refer to...

AI summary The inspection report identified extensive cracking in the TUC2 stack due to freeze-thaw cycling and corrosive environments. The report recommends applying new protective coatings and refurbishing major cracks to prevent further damage and ensure structural integrity. The project is being undertaken now to avoid long-term asset degradation, structural risks, and safety concerns.

etirement and Disposal of Capital Assets • Percentage of Asset Pool: 1.42% JUSTIFICATION: Justification Criteria: Thermal Sub Criteria: Equipment Refurbishment/Replacement Why do this project? The TUC3 steam turbine is forecast to accumula...

AI summary The project involves the refurbishment or replacement of the TUC3 steam turbine due to high operational hours and start/stop cycles, aiming to ensure safe and reliable operation and prevent unplanned outages. The project is being filed now to allow ordering of long-lead materials in 2026 for execution in 2027.

REDACTED 2026 ACE Plan C0080133 Page 2 of 5 excess of 50,000 hours since its last major inspection and will be due for overhaul in 2027 based on NS Power’s asset management strategy. Completing this project in a planned manner, assessing c...

AI summary The document discusses the planned refurbishment of the Intermediate Pressure (IP) turbine at Tufts Cove 3 (TUC3) during the 2027 outage to ensure continued safe and reliable operation, mitigate risks of unplanned outages, and align with NS Power’s asset management strategy. The project aims to reduce operational risks and maintain system reliability.

ne, completing the IP turbine refurbishment during the 2027 planned outage will allow for efficient operation of the unit in alignment with NS Power’s asset management strategy. Contingency Statement Contingency for this project has been d...

AI summary The document discusses the planned IP turbine refurbishment during the 2027 outage, aligning with NS Power’s asset management strategy. A 15% contingency has been determined based on internal expertise, previous experience, and non-binding guidelines to account for unknown potential work scope.

or expiration of this Agreement including, but not limited to, the following provisions: Section 9 (Insurance), Section 20 (Limitation of Liability), Section 23 (Governing Law), Section 28 (Confidential Information) and this Section 31 (Su...

AI summary This document outlines the refurbishment of the Burnside Unit #2 Combustion Turbine engine, including the scope of work, cost, and timeline. The project is necessary due to damage observed on stage 9 blades and aims to restore the unit's functionality and reliability within the NS Power electrical system.

replace deteriorated assets that have been identified through NS Power’s transmission line inspection program. This project includes the replacement of deteriorated assets on a total of 72 structures. The project scope includes: - Structur...

AI summary The project involves replacing deteriorated assets on 72 transmission line structures to ensure the reliable operation of the transmission line and mitigate the risk of unplanned interruptions. The work is prioritized based on the condition of the assets and the criticality of the line to the overall system.

Date: December 12, 2025 Page 375 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) REDACTED 2026 ACE Plan C0070909 Attachment 1 Page 9 of 16 Date: December 12, 2025 Page 376 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMO...

AI summary The Bridgewater Area Planning Study Addendum evaluates two alternatives to address transformer and contingency capacity issues at 70W-High Street Substation. Alternative A involves replacing transformer 70W-T51 in 2026 and adding a new transformer in 2027, with an estimated investment of $5.4 million.

iorated transmission assets that have been identified through NS Power’s transmission line inspection program. This project includes the replacement of deteriorated assets on a total of 59 structures. The project scope includes: - Structur...

AI summary This project involves replacing deteriorated transmission assets identified through NS Power’s inspection program, including 12 structure replacements and others. The work is necessary to maintain system reliability and redundancy, and the project is prioritized based on asset condition and system criticality.

icates that replacing the unit with a new, higher-capacity transformer is the best approach. Overall, this project is crucial to maintain reliable, safe, and efficient power delivery to Mahone Bay. Date: December 12, 2025 Page 389 of 782 R...

AI summary This project involves replacing a transformer (76W-T1) to prevent unplanned failure and ensure reliable power delivery to Mahone Bay. The presence of ethylene in the main tank indicates internal degradation, and delaying replacement increases the risk of sudden failure. The project also aligns with the Town of Mahone Bay’s planned low-voltage infrastructure upgrades and NS Power’s asset management strategy.

ently not capable of live-line operation. Live line switches can be operated while the circuit is energized. These switches isolate line L-6536 and have reached end-of-life, with one being inoperable. Due to the existing switches not being...

AI summary The existing switches on line L-6536 are not capable of live-line operation and have reached end-of-life, requiring an outage for safe work. The project involves upgrading switches to support live-line operation, with no related projects planned in the next five years. The asset has an estimated life of 35 years and falls under the Transmission Plant depreciation class.

f Retirement: Accounting Policy 6420 - Retirement and Disposal of Capital Assets • Percentage of Asset Pool: 0.11% JUSTIFICATION: Justification Criteria: Transmission Plant Why do this project? Utilizing NS Power’s Transformer Risk Assessm...

AI summary The 96H-T1 transformer has reached the end of its service life and is experiencing recurring oil leaks due to severe corrosion. Replacement is necessary to avoid operational, financial, and environmental risks, as the transformer is critical for connecting the Ruth Falls Hydro Generating Station to the transmission grid.

ng Station to the transmission grid, enabling the delivery of renewable hydroelectric energy. Its continued degradation poses operational, financial, and environmental risks. Why do this project now? The 96H-T1 transformer is consistently...

AI summary The document discusses the need to replace a transformer due to oil leaks and its location near a river, which poses environmental risks. Replacement is deemed necessary due to the transformer's degraded condition, lack of OEM support, and the cost-effectiveness of replacement over refurbishment.

of Kms 2023 2024 Feeder Change Completed Condition Condition 103W-312 15 5 3 2 10C-211 7 3 2 1 126H-313 7 4 3 1 127H-411 12 5 3 2 12V-302G 6 5 3 2 16N-301 8 5 3 2 16V-315 10 3 3 0 16V-315G 8 5 3 2 16W-302J 9 3 3 0 18V-412 22 3 3 0 1N-402 5...

AI summary The document presents a table with data on feeder lines, including the number of kilometers, conditions in 2023 and 2024, and changes over time. This appears to be related to infrastructure planning and asset management in the electricity distribution system.

REDACTED 2026 ACE Plan C0080252 Page 2 of 5 JUSTIFICATION: Justification Criteria: Distribution System Why do this project? This project advances NS Power’s overall asset intelligence in a way that is sustainable through the use of the enh...

AI summary This project aims to enhance NS Power’s asset intelligence by integrating advanced technology into their field resources and GIS system, enabling continuous data updates and streamlining customer request processing. The project is being executed now due to the limited timeframe for federal funding, which covers most costs except administrative overheads and contingency.

rred 2027 Less than $1M Deferred due to reprioritization. The existing approach to asset management of this asset is expected to address near-term risks. C0039046 LIN Ash Silo Refurbishment 2024 197,599 214,456 Cancelled Less than $1M This...

AI summary The document outlines several deferred and cancelled projects from the 2025 Annual Capital Expenditure (ACE) Plan, including the 2027 project deferred due to reprioritization and two projects cancelled based on updated risk assessments. These decisions reflect a revised approach to asset management.

ec ng the Final Cost of the project; • Line by line project account variances explana ons will be provided for those accounts with material variances; and • Project scope variances. All projects should be final costed within twelve months...

AI summary Nova Scotia Power Inc. outlines criteria for capital asset retirement, including normal wear and tear and inadequacy. The document emphasizes final cost submissions within 12 months of project in-service dates, with exceptions requiring justification. Projects in ATO positions must comply with rate base rules, removing costs from rate base if not filed timely.

al deteriora on of physical plant caused by use over me and usually occurs because of the physical deteriora on of the asset. This type of re rement usually causes an asset to be scrapped. Inadequacy This usually occurs because of such ite...

AI summary The text outlines categories for asset retirement, including physical deterioration, inadequacy, obsolescence, regulatory requirements, and customer demands. It emphasizes that retired assets may be reusable elsewhere. The document also references Nova Scotia Power Inc.'s capital planning and expenditure justification criteria.

can acquire interests which are less than the fee simple interest in land, including rights- of-way or easements for power lines, or u lity corridors and leases or licences for the occupa on of land. Land and Rights owned by NS Power are m...

AI summary NS Power manages land and rights based on operational needs, acquiring land for capital projects and disposing of surplus land while adhering to environmental criteria. Surplus land is sold if compliant with regulations, otherwise retained or redeveloped. Hydro project land is typically retained for system safety.

nts. Addi onal details pertaining to the condi ons for replacement are provided in the NS Power Capital Planning & Capital Expenditure Jus fica on Criteria Detailed Document. 17.10 DistribuƟon System NS Power's Distribu on System connects...

AI summary NS Power outlines criteria for its distribution system, including requirements to serve, pole strength compliance, voltage standards, and outage performance. The document also addresses pole retreatment principles and conditions, emphasizing infrastructure maintenance and safety standards.

ds to NS Power's personnel or to the general public; • To meet NS Power's obliga ons to third par es or to conform with the provision of applicable laws and regula ons there under; • To protect facility assets by maintaining them in a reas...

AI summary The text outlines Nova Scotia Power Inc.'s obligations to maintain facilities, comply with regulations, and select the least-cost option for capital expenditures. It defines telecontrol and telecommunications infrastructure, referencing the 2026 ACE Plan and a capital expenditure justification document.

s represent projects that carry a higher risk than the projects in the green rankings. While the colours provide a visual illustra on of risk, the ranking numbers are the focus of the ranking process. A lower ranking suggests a lower level...

AI summary The document outlines Nova Scotia Power's approach to capital expenditure justification, emphasizing risk-based project rankings and asset management. Lower-ranked projects may still be prioritized if asset conditions deteriorate, with decisions guided by NS Power staff and third-party experts.

al deteriora on of physical plant caused by use over me and usually occurs because of the physical deteriora on of the asset. This type of re rement usually causes an asset to be scrapped. Inadequacy This usually occurs because of such ite...

AI summary The text outlines reasons for asset retirement, including physical deterioration, inadequacy, obsolescence, regulatory requirements, and customer demands. It also references a detailed capital planning document under Nova Scotia Power Inc.'s 2026 ACE Plan.

d safety is a secondary driver for the project. This criterion applies to capital projects undertaken to comply with applicable laws and accepted industrial prac ces, including but not restricted to: • Nova Sco a Occupa onal Health and Saf...

AI summary The Health and Safety criterion governs capital projects requiring compliance with laws, NS Power standards, and regulatory orders. It applies to active and decommissioned sites, covering expenditures like demolition, site alterations, and security measures. Projects driven primarily by safety compliance use this justification, though other asset management criteria may also apply.

the open market. In such instances the property may be acquired if no economically prac cal alterna ve property is available to sa sfy the requirements of the future project in ques on. Land Disposal NS Power can dispose of, lease or grant...

AI summary The document outlines NS Power's policies for land and asset management, including disposal of surplus land, buildings, and rights-of-way, while emphasizing environmental compliance. It also addresses capital planning and expenditure justification criteria for hydro, wind, and biomass assets.

REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan Appendix D Page 133 of 179 Nova ScoƟa Power Inc. Capital Planning & Capital Expenditure JusƟficaƟon Criteria Detailed Document • Wood stave pipelines shall be replaced when an engin...

AI summary Nova Scotia Power Inc. outlines criteria for capital expenditures, including replacing wood stave pipelines based on engineering risk assessments, turbine runners due to degradation or efficiency gains, and dams/hydraulic structures failing to meet safety standards. Decisions hinge on formal engineering evaluations and risk analyses.

To maintain reliability and quality of supply to the distribu on bus. CondiƟons for Replacement Transmission plant shall be replaced, if s ll required to meet system design requirements, as follows: • Transmission poles which fail the test...

AI summary The text outlines conditions for replacing transmission infrastructure, including poles failing overturning moment tests, specific insulator types with cemented joints, and substation apparatus based on insulation degradation or calibration issues. Regular inspections and testing intervals are specified to ensure system reliability and safety.

oils are tested every year. • Other insula ons are tested every four to six years. Month DD, 2025 Page 71 of 113 Date: December 12, 2025 Page 590 of 782 REDACTED REDACTED (CONFIDENTIAL INFORMATION REMOVED) 2026 ACE Plan Appendix D Page 138...

AI summary The document outlines testing intervals for equipment like SF6 and oil interrupters, battery inspections, and NPCC protection tests. It details NS Power's procedure for evaluating transmission plant replacement, emphasizing economic justification to select the least-cost option meeting requirements.

r other similar methods. Voltage Unbalance Expenditures may be required due to viola on of the criteria outlined in DEP 5.50 "Distribu on Feeder Balancing" on NS Power's system. Alterna ve methods of solving this problem would include phas...

AI summary The text outlines capital expenditure requirements for addressing voltage unbalance, flicker from motor starting, and wood pole retreatment under NS Power's criteria. It references DEP guidelines for distribution feeder balancing and voltage flicker, emphasizes customer responsibility for flicker mitigation, and details conditions for wood pole retreatment using approved preservatives.

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.

1 2.0 SUSTAINING INVESTMENT 2 3 The deferral of the Mersey Redevelopment is aligned with NS Power’s asset management 4 methodologies. Deferring projects when safety, environmental and economic risks, as well as 5 social implications associ...

AI summary NS Power defers Mersey Redevelopment due to safety, environmental, and economic risks, opting for sustaining investments to maintain MHS operations. The Hydro Investment Plan (HIP) dynamically updates capital forecasts, with sustaining investments increasing to $172.4 million (NPV $79.2M) by 2065, reflecting revised cost estimates aligned with recent projects.

eased from $68.1 million in Appendix G of the 2025 ACE Plan to 26 the current forecast of $79.2 million. NS Power continues to revise the profile of the investment 27 in accordance with its asset management principles to ensure projects ar...

AI summary NS Power is revising the investment profile in the 2026 ACE Plan, increasing the amount from $68.1 million to $79.2 million, aligning with asset management principles to schedule projects appropriately. The Mersey Hydro Update is part of the non-confidential information discussed.

ower Great Brook (CI C0070486) and preparation for drawdown at Deep Brook in 2026 (CI C0080219) Safe and Reliable Hoist replacement for stop logs at Cowie Falls to safely and Management of Water reliably manage water (CI C0049032) Dam Safe...

AI summary The document outlines infrastructure maintenance projects for dam safety and powerhouses, including hoist replacements, concrete assessments, and crane column refurbishments at sites like Cowie Falls, Upper Lake Falls, and Big Falls, with associated Capital Item (CI) identifiers.

2026 ACE Plan Appendix E Page 7 of 17 Mersey Hydro Update Non-Confidential Category Scope Dam Safety and Powerhouse roof refurbishment at Lower Great Brook (CI Powerhouses C0060569) to address leaks, protect internal assets, and protect st...

AI summary The Mersey Hydro Update outlines infrastructure and compliance projects, including powerhouse roof refurbishment to address leaks and structural integrity, fish passage improvements to meet Federal Fisheries Act requirements, and switchgear upgrades to enhance electrical safety at Lower Great Brook.

1 4.2 Partial Decommissioning Costs 2 3 The MHS partial decommissioning cost estimate was based on detailed work completed in 2021, 4 leveraging the Big Falls rebuild scenario as a baseline due to significant overlap in scope. Under 5 this...

AI summary The text outlines partial decommissioning costs for the MHS at $512 million CAD, excluding new powerhouse construction and incorporating preparatory activities. It also details 2024 updates to the 2018 Hydro Asset Study by Boreas Heritage Consulting Inc. and Hatch Ltd., reflecting archaeological, environmental, and cost changes.

Y/N Line Kms Kms L-6503-added Onslow to Trenton 0 17 L-6002-added Sackville to 0 12 Bridgewater L-7005 Onslow to 16 9 Hopewell L-7003 Onslow to Port 29 22 Hastings L-7004 Dalhousie 23 18 Mountain to Port Hastings L-7009 Brushy Hill to 18 1...

AI summary NS Power updated transmission lines (e.g., L-6503, L-7005) in 2026 based on asset management priorities, reflecting shifts in infrastructure planning. The note highlights ongoing adjustments to targeted lines throughout the year.

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.

17 These efforts are part of NS Power’s ongoing commitment to improving system reliability, 18 enhancing customer experience, and supporting a more resilient energy future for the province. 19 Page 32 of 71 Date: December 12, 2025 Page 740...

AI summary NS Power's Five-Year Reliability Plan focuses on upgrading aging equipment like poles, transformers, and regulators to reduce outages, improve safety, and comply with federal regulations. The PCB program exemplifies this approach, aligning with asset management strategies and reliability goals.

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.

NS Power Five-Year Reliability Plan - Update Non-Confidential 1 Figure 25: Transmission Work Completed or In Progress (2025) 2 3 4 5.3 Substation Upgrades and Replacements 5 6 2025-2029 Forecast Investment: $233 million 7 2025 Anticipated...

AI summary NS Power's 2025-2029 substation upgrade plan includes $233 million in investments, with $38.8 million allocated for 2025. Key projects include replacing transformers at Whycocomagh, Cobequid, and three other locations, alongside new substation designs and spare transformer additions to enhance reliability and asset sustainability.

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 61 of 71 NS Power Five-Year Reliability Plan - Update Non-Confidential 1 Figure 42: Illustration of Targeted NS Power Transmission Projects Planned for 2026 2 3 4 7.2.3 Substation Upgrades and Replacements 5 6...

AI summary NS Power plans to invest $52.0 million in 2026 for substation upgrades and replacements to enhance system reliability and support regional growth, aligning with their asset management framework and community needs.

CONFIDENTIAL (Attachment Only) 1 necessary to account for the potential additional costs associated with potential, necessary 2 design modifications. 3 4 (d) No risk matrix or detailed schedule was formalized for these projects. These are...

AI summary The text discusses the lack of a formalized risk matrix or detailed schedule for transformer addition projects, noting that NS Power has significant experience with such projects and that risks are well understood. It references a data sheet with technical specifications for power transformers, including manufacturer details and transformer ratings.

Oil Type 2.2.1 Manufacturer Reinhausen Reinhausen 2.2.2 Model DEETAP DU III DEETAP DU III 2.2.3 Range ±5 % ±5 2.2.4 No. of Steps 5 5 2.2.5 Location HV HV 2.2.6 Rated Voltage 69 kV 69 2.2.7 Rated Current 200 A 200 2.2.8 Rated BIL 350 kV 350...

AI summary The document provides technical specifications for a transformer model DEETAP DU III manufactured by Reinhausen, including parameters such as accuracy range, rated voltage, current, and temperature rise.

2026 Annual Capital Expenditure (ACE) Plan (NSEB M12619) NSPI Responses to Consumer Advocate Information Requests 1 Request IR-21: 2 3 With respect to Appendix E: 4 5 (a) Please provide a working copy of Appendix E, Attachment 1. 6 7 (b) P...

AI summary NSPI responds to information requests regarding the 2026 Annual Capital Expenditure (ACE) Plan. It explains the difference between NPV analysis and EAM, notes the lack of information for completing an EAM for all scenarios, and outlines updates to decommissioning planning for Mersey, including updated studies filed with the Board.

(b) NS Power continues to engage with the Provincial Government to provide updates on the progress of the decarbonization projects led by NS Power, namely the synchronous condensers that will be procured and built by NS Power in support of...

AI summary NS Power is working with the Provincial Government on decarbonization projects including synchronous condensers for the Rate Base Procurement, Green Choice Program, and Port Hawkesbury Paper wind farms. IESO-NS is managing transition items from Phase 1 employee transfers and developing its workplan.

1 The below table shows the D008 forecast recalculated to include Extreme Event Days: 2 Year Actuals Pre-AO ($) Adjusted for 1.8% Inflation ($) 2021 1,905,329 2,083,094 2022 100,724,683 108,175,030 2023 6,179,465 6,519,198 2024 939,613 973...

AI summary The document presents a revised D008 forecast incorporating Extreme Event Days and references the 2026 ACE Plan for reliability strategies. It outlines the Reliability Team's structure, responsibilities, and interfaces within NS Power, including roles related to vegetation management, inspection, and stakeholder engagement.

1 1 Request IR-19: 3 Reference: N-1, 2026 ACE Plan, Appendix G – Five-Year Reliability Plan Update. 4 5 Preamble: The Board directed NSPI to provide annual updates on the Five-Year 6 Reliability Plan in each ACE Plan filing. NSPI states it...

AI summary The Nova Scotia Energy Board requested NSPI to provide details on the process used to update the Five-Year Reliability Plan for 2026, summarize substantive changes, confirm unchanged investment amounts, and explain updates to 2029 goals. NSPI began responding by referencing its asset management approach and condition indicators.

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 document outlines a 2026 ACE Plan with a detailed table listing forecasted spending, project titles, combined categories, reliability enhancement, and asset classes. The content appears to be a planning and budgeting document related to energy infrastructure and asset management.

2 (b) These projects are across 12 steam generating units, 8 of which will continue to operate 3 beyond 2030 with natural gas or heavy fuel oil. The annual level of spending on these 4 projects is consistent with the path to 2030 as the Ge...

AI summary The text discusses ongoing maintenance and investment in 12 steam generating units, with 8 continuing beyond 2030 using natural gas or heavy fuel oil. Annual spending aligns with the path to 2030, driven by asset management mechanisms that assess risk based on asset mission and forecasted retirement dates. Projects aim to mitigate risks in the most cost-effective way and ensure safe, reliable capacity until retirement.

2 (d) Confirmed. 3 4 (e) Asset age is a concern when the frequency of required maintenance is increased, the 5 availability of replacement parts or critical spares is limited, or performance is negatively 6 impacted. This information can b...

AI summary The text discusses asset management practices, emphasizing that asset age is not the sole factor in investment decisions but is considered alongside condition, performance, and legislative requirements. It also notes that asset ages are not typically tracked for distribution assets and that the 2026 ACE Plan Application provides useful life ranges based on Iowa State curves.

NON-CONFIDENTIAL Year Replaced Sold Fleet Size Salvage Value Average Age of Replaced Vehicles Average Odometer Reading at Replacement 2022 8 2 134 $11,264 9.5 254,434 2023 14 6 146 $20,291 8.6 259,604 2024 5 0 151 $N/A 8.5 228,974 2025 22...

AI summary The table provides data on vehicle replacement and fleet management from 2022 to 2025, including the number of vehicles replaced, sold, fleet size, salvage value, average age, and odometer readings at replacement.

NON-CONFIDENTIAL Unit IRP ($) 2026 ACE Plan ($) 19 condition and criticality. Lower‑criticality assets are monitored through ongoing 20 inspections, performance data, and subject matter expert judgment, and their ratings are 21 refreshed a...

AI summary This section outlines the process for assessing the condition and reliability of assets, including the use of performance data, inspections, and expert judgment. Lower-criticality assets are monitored and reviewed as needed, while reliability is evaluated based on historical performance, equipment condition, and degradation trends. Mitigation plans are developed when reliability concerns are identified.

7 Year SAIDI All-In SAIDI MED Excluded Resilience Gap 2 3 Directives & Misc pages 87 to 141 4 5 Section 11.1.4 Impact of Reliability Projects pages 92 to 132 6 7 Page 100 of the application discusses the metrics and the measure of Reliabil...

AI summary The document discusses the use of Reliability Cost Efficiency (RCE) as a metric to evaluate risk mitigation strategies for improving reliability in the electricity grid. An example is provided where NS Power considers options like strategic undergrounding or vegetation management for a rural feeder section with increased circuit risk. The RCE metric is not the sole criterion for project selection but is used to refine the choice of interventions.

2026 Annual Capital Expenditure (ACE) Plan (NSEB M12619) NSPI Responses to NSEB Information Requests 1 Request IR-53: 2 3 Directives & Misc pages 87 to 141 4 5 Section 11.1.4 Impact of Reliability Projects pages 92 to 132 6 7 Page 106 stat...

AI summary NS Power states that it continuously evaluates opportunities to improve equipment resilience to adverse weather, including adopting practices from other utilities in harsher climates. Updates to design and construction standards are made based on lessons learned from extreme weather and evolving industry practices.

NON-CONFIDENTIAL - 1 The age of the failed crossarms, pin insulators, and conductor is not known. Age data for these - 2 individual assets is not tracked.

AI summary The document indicates that the age of failed crossarms, pin insulators, and conductor is not known, as age data for these individual assets is not tracked.

ower the peak load on transformer 89W-T51 back to 100% of its top rating of 11.2MVA. The results of this analysis favour Alternative A-2: Replace 89W-T1 with a New 15/20/25 MVA Transformer (in 2004). .2 Deteriorated Plant Criteria Violatio...

AI summary The document discusses the replacement of two aging transformers, 89W-T1 and 70W-T51, based on their deteriorated condition and service life estimates. Alternative A-2 is recommended for 89W-T1, while 70W-T51 is expected to reach the end of its useful life in 2009, requiring replacement or retirement.

B INSPECTION TRANSFORMER SYSTEM NO. 96H-T1 DATE Sep 23 2018 TESTED BY: JS/SF/CAB OIL TESTING MAIN TANK POWER FACTORSEE DOBLE RESULTS MAIN TANK BREAKDOWN 22kV TAPCHANGER POWER FACTORSEE DOBLE RESULTS TAPCHANGER BREAKDOWN 30 kV TAPCHANGER YE...

AI summary This document details an inspection report for a transformer system conducted on September 23, 2018. Key issues identified include a non-operational tap changer, oil leakage, and failing gaskets. Recommendations include not repairing the head gaskets and instead testing and returning the system to service.

11 3 (b) Consistent with NS Power's overall asset management system, the Company uses a risk-4 based approach to identify lines and structures requiring mitigating interventions, including 5 asset replacement, based on their assessed condi...

AI summary The document discusses NS Power's approach to asset management, focusing on risk-based interventions for replacing deteriorated transmission line structures. It references the 2026 Annual Capital Expenditure (ACE) Plan and mentions that such projects may take several years to fully realize condition improvements.

Q: Is the lack of data on regular and overtime person-hours of concern? A: Yes. Several of the distribution routines have substantial overtime labour forecasts, and it is unclear whether NS Power has any internal practices for minimizing t...

AI summary The lack of data on regular and overtime person-hours is a concern, as several distribution routines have high overtime forecasts. NS Power uses an 'overtime-based model' due to the variability of outage calls, but tracking overtime use is essential to identify inefficiencies and opportunities for better scheduling.

Q: Are there challenges for NS Power to participate in existing spare inventory pooling programs? A: In response to an information request, NS Power stated: NS Power has previously investigated spare inventory pooling opportunities … but d...

AI summary NS Power has investigated spare inventory pooling programs but found them potentially less effective than current strategies due to high costs, availability issues, and logistical challenges, particularly with spares stored in the US. Further study is needed to assess effectiveness.

condition. Regardless of whether the MHS is ultimately redeveloped or decommissioned, the existing facilities will be required to operate for the foreseeable future while the broader policy, regulatory, and system planning considerations a...

AI summary The Wilson Evidence expressed concern that NS Power lacks a strong plan to protect customers from excessive costs related to the potential redevelopment or decommissioning of the Mersey Hydro project. NS Power continues to invest in sustaining capital to ensure safe operation of the Mersey Hydro System (MHS) while deferring long-term decisions. This approach is considered the lowest-cost option for customers and allows for better-informed decisions once policy, regulatory, and planning considerations are resolved.

NON-CONFIDENTIAL 1 Undertaking U-7: 2 3 To provide a list of other reliability and resilience metrics that were considered by NS Power 4 beyond the RCE method, understanding that there could be different metrics, depending on 5 the type of...

AI summary NS Power explains that while the Reliability Cost Efficiency (RCE) method is used to evaluate reliability strategies, it is not the sole metric for project selection. Other metrics, such as \/Customer Hour of Interruption, are not applicable to all asset classes. Mr. MacIntosh emphasizes the need for engineering judgment and local knowledge in selecting risk mitigation strategies.

4 The maximum existing loading recorded on each of the existing three (3), 4.16kV 5 distribution circuits during the past 12 months were as follows: Feeder 76W-211 76W-212 76W-213 96H Ruth Falls Upper 96H Ruth Falls Upper (SMSTE) 96H-T1 Ga...

AI summary The text presents data on the maximum loading recorded on three 4.16kV distribution circuits over the past 12 months, including details on various indicators such as oil temperature, tapchanger control status, and equipment conditions. It highlights an issue with fans not functioning properly and the presence of oil leaks.

SITE ASSESSMENT & TIER I/II TABLE CHECKLIST Method Used

AI summary The document outlines a checklist for site assessment and Tier I/II table evaluation, focusing on environmental and safety procedures. It includes methods used for assessing sites and managing potential environmental risks.

2.3.7.1 Findings - [80] The Board accepts that a fixed capital ceiling is not an appropriate substitute for risk-based asset management, as a ceiling may not adequately address identified risks. The Board also accepts that sometimes it may...

AI summary The Board acknowledges that a fixed capital ceiling is not suitable for risk-based asset management and accepts that capital reallocation may be prudent under certain conditions. However, it emphasizes that capital reallocation and 'capital envelope' justification are distinct issues. The Board is also concerned about baseline ratcheting in the Routine Program and calls for more information to distinguish between permanent and temporary cost pressures.

tepayers. One would expect any private non-utility proponents who contract with the IESO Nova Scotia for energy generation, or ancillary services, to have a rate of return factored into their pricing. [168] None of the foregoing examples h...

AI summary The document discusses concerns raised by the DOE regarding NS Power's capital spending growth and its alignment with system reliability and capacity. There is a concern that while the asset base has expanded, generating and distribution capacity and reliability have not kept pace. The Board is also uncertain about the meaning of 'corresponding expansion of physical system benefits.'

s are designed to maintain safe and reliable operation of the MHS while NS Power continues planning and engagement activities required to support the future Mersey Redevelopment Project scope of work. [229] In its 2026 ACE Plan, NS Power s...

AI summary NS Power has updated its 2026 ACE Plan to increase sustaining capital for the Mersey Hydro System from $160.7 million in 2025 to $172.4 million in 2026, with NPV increasing from $68.1 million to $79.2 million. The increase is due to revised cost estimates based on recent projects, and sustaining investment for 2026-2030 is $45.1 million to ensure safe and reliable operation until the Mersey Redevelopment Project begins.

Scenario NPV Class of Estimate Full Decommissioning ($196M) Unclassed Partial Decommissioning ($346M) Class 4 Redevelopment ($164M) Class 4 [Exhibit N-1, Appendix E, p. 10]

AI summary The text presents a table with three scenarios—Full Decommissioning, Partial Decommissioning, and Redevelopment—each associated with a net present value (NPV) and a class of estimate. The table is referenced as Exhibit N-1, Appendix E, page 10.

ximately $6.5 million. The primary difference from the Mersey Redevelopment Project, is that the partial decommissioning option excludes the construction of a new powerhouses and generation equipment. [233] In response to NSEB IR-162 c), N...

AI summary The text discusses two decommissioning options for the Mersey Hydro System: partial and full. The partial option excludes new powerhouses and generation equipment, with minimal sustaining capital costs. The full decommissioning option involves re-naturalizing the system and has a capital cost estimate of $512.3 million, including archaeological work, infrastructure removal, and environmental mitigation.

10.1 Findings [237] The Board accepts NS Power's Mersey Hydro System Update as filed with the 2026 ACE Plan application. [238] The Board directs NS Power to provide another comprehensive update on the Mersey Redevelopment Project in the 20...

AI summary The Board accepts NS Power's Mersey Hydro System Update as part of the 2026 ACE Plan application. It also directs NS Power to provide a comprehensive update on the Mersey Redevelopment Project in the 2027 ACE Plan, including capital sustaining costs, NPV analysis, and updates related to Mersey Hydro System modelling from the IESO's 2026 IRP.

Request IR-41: - a) Are all assets rated each year or is there a failure or age threshold to trigger a rating? - b) NS Power identified in the third bullet that projects are rated according to unit reliability, among other indicators. Plea...

AI summary The document includes two questions regarding asset rating practices by NS Power, specifically whether all assets are rated annually or if there is a failure or age threshold, and how unit reliability is assessed and applied as a rating threshold.

Request IR-58: - Figure 76: Age Based Replacement Ranges for Energy Delivery Assets on page 121. Please confirm or explain otherwise that the definition of High Range Replacements and Low Range - Replacements is in reference to NS Power's...

AI summary The request seeks clarification on the definition of High Range and Low Range Replacements for energy delivery assets, specifically in relation to NS Power's risk rating and the threshold risk rating for classification.

Request IR-80: - In matter M10985 an application for CI C0055376 in 2023, the Board approved NS Power's - request to replace five L-0 blades with re-used blades and refurbishment of an additional two - blades. Are any of the blades that we...

AI summary The text refers to a request to replace and refurbish blades in a project approved by the Board in 2023, specifically asking if any of the blades replaced or refurbished in 2023 are part of this project.

a) If not confirmed, please explain. G07: C0068888 TUC3 Continuous Ash Hauling System Request IR-96: The application considers that this investment will reduce operational costs. - a) What are the annual forecasted costs of NS Power to per...

AI summary The document contains multiple requests for information regarding the Continuous Ash Hauling System and Engine Refurbishment projects. It asks about costs, maintenance schedules, TCO analysis, and the reasons for selecting specific systems and contractors. It also inquires about the operating history of a turbine unit and the OEM's recommendations for refurbishment.

Request IR-113: - Do any assets require replacement because they do not meet NS Power's ground clearance - requirements? - a) If so, please describe and explain why the current assets do not meet these requirements.

AI summary The document asks whether any assets need replacement due to not meeting NS Power's ground clearance requirements and requests an explanation if they do not meet these requirements.

Request IR-114: Please explain specifically how NS Power determined that 57 structures need replacement.

AI summary The document requests an explanation from NS Power on how they determined that 57 structures require replacement, likely in the context of infrastructure planning or asset management.

Request IR-120: - Do any assets require replacement because they do not meet NS Power's ground clearance - requirements? - a) If so, please describe and explain why the current assets do not meet these requirements.

AI summary The document requests information on whether any assets require replacement due to not meeting NS Power's ground clearance requirements, and if so, a description and explanation of why current assets do not meet these standards.

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.

eering process. 1. If not confirmed, please explain why. Please provide cost support references from similar projects recently completed and update the detailed project estimates for each project. Please provide specific details on the cri...

AI summary The text outlines a series of requests for detailed project cost estimates, asset replacement criteria, and specific project-related information. It includes questions about NS Power's transformer additions and replacements, as well as requests for supporting documentation and GIS maps.

the load on either 89W‑T1 or 70W‑T53? Please include a GIS map drawing to support the explanation. 6. Please submit the 2006 planning report. T03: C0080109 L7001 Replacements and Upgrades Phase 1 1. Please provide the inspection results an...

AI summary The text contains a series of requests for information related to infrastructure replacement and upgrades, including GIS maps, inspection results, cost estimates, and transformer replacement details. The focus is on verifying the need for replacements, incorporating LiDAR data, and comparing unit costs to previous plans.

decommission the MHS is $512 million CAD.” Board staff notes that Attachment 1 of Appendix E denotes an estimate partial decommissioning cost of $624M. Please explain this discrepancy. Attachment 1: 1. Please provide a copy of Attachment 1...

AI summary The document raises questions about discrepancies in decommissioning cost estimates for MHS, retirement dates for Trenton generating units, and the strategic benefits of holding generating units in cold reserve. It also requests clarification on the value for money of these decisions and the inflation allowance incorporated into capital sustaining cost estimates.

27 Reference: N-1, 2026 ACE Plan, page 29, lines 10-12, and page 30, lines 1-2. These 60 projects were originally included in the 2025 ACE Plan with a forecast investment of $60.3 million in 2025. 21 of these projects have been cancelled,...

AI summary Sixty projects initially included in the 2025 ACE Plan with a forecast investment of $60.3 million in 2025 have been adjusted: 21 projects were cancelled, and 39 were deferred to future years. NS Power's asset management processes guide these decisions to manage risks and prioritize capital investments.

16 Request IR-18: 17 Reference: N-1, 2026 ACE Plan, page 96, lines 1-8, "Reliability Strategies". This approach is driven by and aligned with NS Power's asset management strategy for T&D assets and includes implementation by the Reliabilit...

AI summary The text discusses NS Power's Reliability team and its alignment with asset management strategies for transmission and distribution (T&D) assets. The team is responsible for reliability improvements and works with other teams such as Energy Delivery and Enterprise Asset Management (EAM). An organization chart for the Reliability Team is requested.

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.

n what may or may not be very small incremental improvements to the system. But in all cases, we would take direction from the Board if they saw otherwise."[15](#page-2-2) The Consumer Advocate appreciates that NS Power already makes effor...

AI summary The Consumer Advocate suggests NS Power should leverage Maximo/Salesforce software to improve efficiencies, particularly in contractor-based projects like vegetation management. NS Power acknowledges increased contractor costs but lacks a detailed breakdown of efficiency metrics and has not provided explanations on how it measures productivity.

Distribution The Distribution portfolio demonstrates some of the most significant cumulative escalation levels within the reviewed sample. Of particular concern is the extent to which routine and recurring - programs have expanded into ver...

AI summary The Distribution portfolio shows significant capital expenditure increases without clear justification related to customer growth or reliability outcomes. Items such as Provincial Distribution ROW and New Customers Residential Routine have seen massive escalations, raising concerns about prudence, forecasting assumptions, and the classification of expenses as capital versus operating costs.

2.3.7.1 Findings - [80] The Board accepts that a fixed capital ceiling is not an appropriate substitute for risk-based asset management, as a ceiling may not adequately address identified risks. The Board also accepts that sometimes it may...

AI summary The Board acknowledges that a fixed capital ceiling is not suitable for risk-based asset management. It emphasizes that capital reallocation and 'capital envelope' justification are separate issues. The Board is concerned about baseline ratcheting in the Routine Program and calls for more information to determine if increased expenditures reflect permanent investment needs or temporary cost pressures.

ere not completed and carried over into 2026, and unplanned work that arose in 2025 makes up the variance between the $179.4 million in Undertaking U-5 and the actual 2025 investment of $206 million. [145] NS Power states that differences...

AI summary NS Power explains that differences between planned and actual spending in the 2025 Reliability Plan are due to deferrals and new priorities, and that capital plans must remain flexible. It argues that the Five-Year Reliability Plan's stability is appropriate given its early stage and that reliability investments do not typically drive yearly cost savings.

tepayers. One would expect any private non-utility proponents who contract with the IESO Nova Scotia for energy generation, or ancillary services, to have a rate of return factored into their pricing. [168] None of the foregoing examples h...

AI summary The text discusses concerns raised by the DOE regarding the expansion of NS Power's capital program without a corresponding increase in electrical system capacity and reliability. It also touches on the integration of renewable energy and the need for improved asset management.

s are designed to maintain safe and reliable operation of the MHS while NS Power continues planning and engagement activities required to support the future Mersey Redevelopment Project scope of work. [229] In its 2026 ACE Plan, NS Power s...

AI summary NS Power has updated its 2026 ACE Plan to include increased sustaining capital for the Mersey Hydro System, reflecting revised cost estimates based on recent project reviews. The NPV for sustaining investment has also increased, and the HIP outlines sustaining investment plans for the years 2026 to 2030.

Scenario NPV Class of Estimate Full Decommissioning ($196M) Unclassed Partial Decommissioning ($346M) Class 4 Redevelopment ($164M) Class 4 [Exhibit N-1, Appendix E, p. 10]

AI summary The text presents three scenarios—Full Decommissioning, Partial Decommissioning, and Redevelopment—each with associated net present value (NPV) and class of estimate. These scenarios are outlined in Exhibit N-1, Appendix E, page 10.

I N D E X O F P R O C E E D I N G S April 21, 2026 PAGE NO. 2 opportunities related to Distribution Routines, Mr. 3 Wilson's recommendations primarily focus on Nova Scotia 4 Power's reporting requirements and other changes to its 5 work ma...

AI summary The document discusses recommendations by Mr. Wilson regarding Nova Scotia Power's reporting requirements, work management practices, contingency caps, reliability metrics, and updates to the CEJC. Nova Scotia Power has accepted two of the 15 recommendations, while the remaining 13 are under consideration in the proceeding. The Consumer Advocate plans to further explore these issues with Nova Scotia Power.

NS POWER PANEL 41 In-ch, (Power) 1 From there, I transitioned to the 2 unregulated side of the business, overseeing three large 3 generating facilities in New England as Vice President of 4 Operations for Emera Energy. And in 2018, I reloc...

AI summary The document introduces a witness who has held various leadership roles in energy companies, including Vice President of Operations at Emera Energy and Vice President of Energy Supply at Tampa Electric. The witness is currently the Chief Operating Officer at Nova Scotia Power and is responsible for power production, asset management, and the Eastern Clean Energy Initiative Project Team. The witness has testified in multiple proceedings, including ACE and GRA.

NS POWER PANEL 43 In-ch, (Power) 1 integrity programs. Since then, I've held several roles 2 in the company with increasing responsibility in the field 3 of asset management. My primary focus has been on 4 advancing and standardizing asset...

AI summary The document includes testimony from individuals with extensive experience in asset management and power production at Nova Scotia Power. The individuals discussed their roles and backgrounds, focusing on asset management methodologies and capital projects outlined in the ACE Plan.

NS POWER PANEL 65 Cr-ex, (Murphy) 1 yes. 2 Q. Okay. 3 A. (Peachey) That's correct. 4 Q. And so there's nothing 5 outstanding at this time? 6 A. (Peachey) That's correct. 7 So on the topic of Distribution Q. 8 Routines and work asset manage...

AI summary The proceeding discusses the tracking of person hours for distribution routines by Nova Scotia Power, with the clarification that only Distribution Routine D005 uses person hours for forecasting, while others do not. The discussion also touches on the distinction between tracking labour costs and person hours.

NS POWER PANEL 71 Cr-ex, (Murphy) 1 think would provide value where we're potentially just 2 reporting on what may or may not be very small incremental 3 improvements to the system. But in all cases, we would 4 take direction from the Boar...

AI summary The text discusses the reporting standards and thresholds for incremental improvements in the Work Asset Management (WAM) system used by Nova Scotia Power. It highlights the potential value of reporting changes that affect project forecasting or work execution, as well as the limitations of the system in managing all T&D activities.

NS POWER PANEL 73 Cr-ex, (Murphy) 1 just to confirm what that refers to. 17 So in the report, Nova Scotia Q. 18 Power says that: 19 Transactions per labour hour provides an INTERNATIONAL REPORTING INC. CERTIFIED COURT REPORTERS 1 2 3 4 app...

AI summary The text discusses Nova Scotia Power's use of 'transactions per labour hour' as a metric to measure efficiency between old and new WAM systems. The discussion includes how this metric translates into cost savings and the reasoning behind its selection as an efficiency measure.

NS POWER PANEL 83 Cr-ex, (Murphy) 1 programs and come up with a figure, but how does that 13 would then be tracked back to capital programs and 14 projects and different expense accounts, right? 15 (Beaton) Yes. Yeah, as I said, A. 16 ever...

AI summary The discussion revolves around the tracking of capital programs and expense accounts, with a focus on how work orders are tied to GL accounts and capital budgets. There is also a mention of the WAM Project and an extension of its reporting period.

NS POWER PANEL 197 Cr-ex, (Rudderham) 1 A. (MacMullin) So if we were to take 2 a look at, I believe, Figures 3 and 4 in Appendix G. 3 MS. MacMULLIN: Perhaps, Mr. Norwood, 4 if you don't mind pulling that up, just so that we're all 5 lookin...

AI summary The discussion focuses on evaluating the effectiveness of the Five-Year Reliability Plan through performance indicators such as reductions in tree-related and defective equipment-related outages, and improvements in SAIDI metrics. The plan is aligned with the Asset Management Strategy and aims to reduce outage duration and frequency.

NS POWER PANEL 203 Cr-ex, (Rudderham) 1 this question." 2 Do you see the response there? 3 A. (MacMullin) I do. 4 Q. So it's fair to say that the 5 update you provided provides no changes to investments, 6 totals, criteria, the scope of th...

AI summary The discussion revolves around the lack of changes to investment amounts, totals, criteria, and project scope in the Integrated Resource Plan (IR-24). The response confirms that these elements remain unchanged, and the continued use of the Asset Management Mechanism for investment prioritization is highlighted.

NS POWER PANEL 211 Cr-ex, (Rudderham) 1 Q. And then the second one or the 14 reviewed the listed projects from 2025 with what is 15 forecasted for 2026? 16 (MacMullin) So let's look at A. 17 these three specific projects that you've highli...

AI summary The discussion focuses on the evaluation of infrastructure projects, specifically three substations, as part of an asset management process. The witness mentions the use of updated mechanisms and prioritized investment plans, referencing Appendix G and the Affordable Clean Energy (ACE) program.

NS POWER PANEL 299 Cr-ex, (Mahody) 1 looking at a feeder level, when you start looking at a 2 system level, there's so many puts and takes that that's 3 when we say things like that they can mask the input, that 4 to do a straight sum does...

AI summary The discussion addresses challenges in assessing the impact of asset replacement on system reliability. While Nova Scotia Power aims to measure improvements in asset performance, the complexity of system-level interactions makes it difficult to provide a single metric for reliability improvements.

NS POWER PANEL 301 Cr-ex, (Mahody) 1 metrics that you're trying to look at the overall risk of 2 that asset. And that looks at your condition of your 3 assets, as well as what you think it's going to do in 4 terms of performance. There are...

AI summary The discussion centers on the evaluation of asset risk using a suite of metrics, including both leading and lagging indicators, to prioritize investments and demonstrate reliability benefits. The focus is on how specific projects, such as conductor upgrades and line relocations, reduce risk and improve performance over time.

NS POWER PANEL 303 Cr-ex, (Mahody) 1 we just scroll over onto the page? It's page 100 of the 2 Application. 3 BY MR. MAHODY: 4 Q. And right at the top of the page, 5 Nova Scotia Power says: 6 7 8 9 10 One option for consideration in evalua...

AI summary The discussion revolves around Nova Scotia Power's consideration of Reliability Cost Efficiency (RCE) as a measure for evaluating reliability strategies. The witness is asked to identify other options considered before settling on RCE, with a reference to the Affordable Clean Energy (ACE) Plan and Asset Management Mechanism for context.

NS POWER PANEL 311 Cr-ex, (Mahody) 1 (MacIntosh) Mr. Mahody, we can A. 18 And if we just looked at the lagging 19 performance of transformers or feeders in the investment INTERNATIONAL REPORTING INC. CERTIFIED COURT REPORTERS 1 plan to loo...

AI summary The document discusses a regulatory proceeding involving NS Power, focusing on transformer performance, proactive investments, and undertakings related to outage history and feeder load values. The discussion includes questions from the Chair and Mr. Mahody, as well as responses from Mr. Norwood.

NS POWER PANEL 319 Cr-ex, (Mahody) 1 this project. And the question I wanted to focus in on is 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 Routine maintenance work in August 2024 identified damage to the transformer infrastructure t...

AI summary Routine maintenance in August 2024 revealed damage to a transformer, leading to a release of 300 litres of mineral oil. Emergency repairs found that the oil containment system was compromised, resulting in contamination of the soil and bedrock. Nova Scotia Power has been conducting monthly inspections and retained Strum Consulting for an environmental site assessment.

NS POWER PANEL 327 Cr-ex, (Mahody) 1 Q. And do those enhanced mechanisms 2 you've identified, Mr. MacIntosh, include opening and 3 closing tests on these breakers? 4 A. (MacIntosh) There would be test 5 reports, yes. 6 Q. And what is the t...

AI summary The discussion centers on the inspection and replacement of Pennsylvania circuit breakers by Nova Scotia Power, including testing procedures, repair times, backup plans for failure, and the use of risk assessments to determine whether breakers require replacement.

NS POWER PANEL 329 Cr-ex, (Mahody) 1 Management Mechanism, you've got a condition of the 2 Pennsylvania breakers, then you have a criticality if it 3 doesn't work or fails to operate, what happens. And that 4 would have an associated risk...

AI summary The discussion focuses on the management of Pennsylvania breakers, their criticality, and the risk ratings associated with their failure. The utility uses asset assessments and industry information to determine replacement needs. The discussion also references Exhibit N-6 and Project C0080266, which involves distribution right of way and vegetation management on transmission lines.

NS POWER PANEL 331 Cr-ex, (Mahody) 1 2 requirements. 5 an undertaking, but we wouldn't necessarily complete 6 vegetation management on all transmission lines through 7 this period. So where it starts with the N/As under the 8 "Percentage o...

AI summary The text discusses NS Power's approach to vegetation management on transmission lines, noting that not all lines are fully managed due to ongoing projects like the 69kV Widening Program and T010. The speaker suggests verifying whether the N/A entries in the data are due to incomplete work.

NS POWER PANEL 497 Questions, (Murphy) 1 Q. Okay. Thank you. 16 Station is decommissioned, is that project still required? 17 (Drover) Yes, that project would A. 18 still be required. The decommissioning is associated with 19 the powerhous...

AI summary The text discusses questions raised during a regulatory proceeding involving NS Power, focusing on the decommissioning of a station, the continued requirement of a dam project, and the exclusion of a Wreck Cove Tunnel T-2 remediation project from the current five-year projection. The response highlights updated strategies and inspections influencing project decisions.

1 finish your questions and move on with Mr. Wilson, if 14 from forecast over the forecast for 20 for the 15 previous year of 9.3. And so it says: 16 17 18 19 20 21 22 23 The increase in forecast spend for 2026 is primarily driven by incre...

AI summary The text discusses an increase in forecast spend for 2026 driven by investments in system reliability initiatives, including pole upgrades. It also addresses the use of field information in risk-based assessments and how that data is transferred to decision-makers.

NS POWER PANEL 515 Questions, (Chair) 1 decisions. 2 Q. Okay, okay. Stronger poles. 3 THE CHAIR: Can you just go back to 4 the IR response? Just scroll back up to (a). 5 BY THE CHAIR: 6 Q. It discusses stronger poles, but 7 is stronger pol...

AI summary The discussion centers on the cost drivers for infrastructure upgrades, with a focus on whether stronger poles are a key factor. The response indicates that while stronger poles contribute to increased costs, the main driver is the overall increase in the number of work units completed, primarily for replacing deteriorated assets with more robust infrastructure.

NS POWER PANEL 519 Questions, (Chair) 1 conductors, transformers, connections and service assets. 2 Does that seem about right to you? 3 I mean, I just did the math by adding 4 it all up and dividing it by numerator by denominator. 5 (MacM...

AI summary The discussion revolves around asset categories, specifically poles classified as structures, and the analysis of outage data from 2022 to 2025, noting a decrease in outages but an increase in annual costs. The Chair is interested in a specific part of the response related to asset categories.

NS POWER PANEL 527 Questions, (Chair) 1 basis that would tell us the condition of each one of 2 these asset components on across these structures. So 3 when we go back would be only determined on the condition 4 as found through these insp...

AI summary The discussion centers on asset inspection cycles and the risk rating of a customer information system replacement project under the 2025 ACE Plan. The project has a high risk rating of 25 and is expected to be submitted in Q4 of 2026.

that I've attended every moment of the hearings, but I have attended the vast majority. Q. Okay. So have any of those opinions changed, or do you want to change or provide any Cr-ex, (Kayter) additional opinion based on any of the evidence...

AI summary The witness confirms attendance at hearings and acknowledges that some opinions may change based on evidence presented. Specific reference is made to an undertaking related to the definition of transactions and labour hours in the Maximus sales force application and asset management program.

y do track hours for to the capital routines. So that was different than what they stated in the IR response that I relied on in my testimony. The second part of your question, Cr-ex, (Kayter) though, was sort of does the lack of visibilit...

AI summary The expert testifies that the lack of visibility into distribution work processes may lead to higher costs per new customer, as the asset management software is not being fully utilized to manage and minimize these costs.

installation is in Australia compared to other markets in the world. And one of the reasons is, is they have a very simplified permitting process, but also the installers use very Cr-ex, (Kayter) aggressive scheduling methods in order to m...

AI summary The discussion highlights Australia's simplified permitting process and efficient installation scheduling methods, which could be applied to improve distribution routines and asset management practices in Nova Scotia.