N-1CI C0080112 - HYD Big Falls Unit 6 Rotor Re-Insulation U&U - Redacted
13 passages
NSEB APPROVAL SHEET HYD Big Falls Unit 6 Rotor Re-Insulation Project Title: CI Number: C0080112 Date: October 6, 2025 Expenditure Profile Type of Filing Year Budget Amount Project Estimate Capital Project Authorization X X Unforeseen and U...
AI summary This document is an NSEB approval sheet for the HYD Big Falls Unit 6 Rotor Re-Insulation project. It outlines the expenditure profile, including budget amounts for 2025, 2026, and 2027, and includes authorization to overspend and final cost details. The document was submitted by Nova Scotia Power Incorporated and approved by the Nova Scotia Energy Board.
CI Number: C0080112 Title: HYD Big Falls Unit 6 Rotor Re-Insulation Start Date: 2025/05 In-Service Date: 2026/04 Final Cost Date: 2026/10 Function: Hydro Forecast Amount: $1,025,626
AI summary This document outlines a cost item related to the re-insulation of the HYD Big Falls Unit 6 rotor, with a forecast amount of $1,025,626. The project is scheduled to start in May 2025, be in service by April 2026, and have a final cost date in October 2026.
Summary of Related CIs +/- 2 years Pursuant to Section 11.2 of the CEJC, related CIs for Hydro projects include "work completed on the same generating unit and dam structures, but not necessarily the same asset." - 2024 CI C0059785 HYD BIF...
AI summary The document summarizes related Capital Investment (CI) projects for Hydro, including upgrades and replacements on the Mersey River Hydro System. It notes that depreciation is calculated over a 40-year life for the Hydraulic Production Plant.
Why do this project this way? A full refurbishment of all 42 rotor poles is the most cost-effective and operationally sound approach to restore the generator to service, while mitigating the risk that the deteriorated condition currently p...
AI summary A full refurbishment of all 42 rotor poles is recommended as the most cost-effective and operationally sound approach to restore the generator, avoiding future failures and unplanned outages. This aligns with NS Power's strategy to maintain safe and reliable operation of the Mersey Hydro System.
Contingency Statement Contingency for this project has been determined using a combination of internal subject matter expert (Professional Engineers) judgement and previous experience in generator disassembly projects. Consistent with the...
AI summary The contingency for the project is set at 20 percent, covering risks such as unforeseen conditions during disassembly, minor refurbishment work, and additional labor. This is based on internal expert judgment and previous experience, and the project is classified as a Class 3 estimate.
REDACTED CI C0080112 Page 3 of 4 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Capital Project Detailed Estimate Location: Hydro CI#: C0080112 Title: HYD Big Falls Unit 6 Rotor Re-Insulation
AI summary The document outlines a capital project titled 'HYD Big Falls Unit 6 Rotor Re-Insulation' with a specific location and cost item number. It refers to a detailed estimate for this project, indicating a focus on infrastructure maintenance or improvement.
Execution Year: 2025 - 2026 Description Unit Quantity Unit Estimate Total Estimate Cost Support Reference Completed Similar Projects (FP#'s) Regular Labour Hydro River Staff - Construction PD 336 $ 417 $ 140,000 Engineering Staff PD 74 $ 4...
AI summary The document presents a cost estimation breakdown for a project executed between 2025 and 2026, including labor, travel, materials, and overhead costs. It outlines various components such as hydro river staff construction, engineering labor, and miscellaneous expenses, with a total estimated cost of $1,025,626, including administrative and capitalization costs.
Document No: XXX-XX-XXXX-XXXX Project Cost Estimate Input Checklist and Maturity Matrix Equipment Data Sheets Preliminary (P) NR/S P P C C C Complete (C) NR/S Complete (C) NR/S P C C C Complete (C) NR S/P C C C Complete (C) NR S/P C C C Eq...
AI summary The document presents a checklist and maturity matrix for project cost estimate inputs, including various stages of completion (Preliminary, Complete, Not Applicable) and associated criteria for equipment data sheets, equipment lists, design specifications, and drawings.
NorthPoint Job Number 57638 Customer PO: 5010070 PRICING SUMMARY FOR REPAIR OR COMPLETE REFURBISHMENT.
AI summary This document provides a pricing summary for the repair or complete refurbishment of a project associated with NorthPoint Job Number 57638 and Customer PO: 5010070.
REFURBISHMENT OF 42 POLES: BASED ON SUPPLIED INFORMATION - BETWEEN TURNS INSULATION: 2 LAYERS OF NOMEX B-STAGE .005" - GROUND WALL INSULATION: 4 LAYERS OF NOMEX 410 0.010" - BONDING OF COILS ON THEIR POLE CORE - SHIMMED COIL PROCESS : GP01...
AI summary The document details the refurbishment process for 42 poles, including insulation specifications, coil bonding, paint application, and waste disposal procedures. The process involves chemical abatement for removing old insulation, ensuring compliance with environmental laws in Quebec.
PRICE PER POLE FOR COMPLETE REFURBISHEMNT BASED ON THERMAL IMAGES FROM NSPI IT IS ALOS RECOMMENDED THAT ATTIONAL WORK BE CONSIDERED AS PART OF THE ROTOR REFURBISHMENT. SEVERAL BRUSH BOXES AND BRUSHES HAVE SIGNE OF HEATING. IT APPEARS THERE...
AI summary The text discusses the need for additional work during a rotor refurbishment based on thermal images from NSPI, including concerns about brush boxes, brush pressure, and slip ring conditions. Recommendations include machining and polishing slip rings and replacing brush boxes, with the scope and pricing for these items included.
REDACTED CI C0080112 Attachment 1 Page 8 of 8
AI summary The document contains a redacted page from a regulatory proceeding in Nova Scotia, likely related to a capital investment or infrastructure project. It includes a reference to a Hydro Interval Plan (HIP) and other technical terms, but the content is not fully visible due to redaction.
BRUSH AND BRUSH BOX REPLACEMENT - EVALUATION OF THE BRUSH SPRING TENSION FOUND THE AVERAGE BRUSH PRESSURE IN POUNDS PER SQUARE INCH (PSI) IS 2.2LBS. THE RECOMMENDATION FOR BRUSH PRESSUE ON A SLIP RING ASSEMBLY SUCH AS THIS UNIT SHOULD BE I...
AI summary The evaluation of the brush spring tension found an average brush pressure of 2.2 PSI, below the recommended range of 3.5-4.5 PSI for a slip ring assembly. Northpoint recommends replacing the brush boxes and brushes, with a total of 12 boxes and 24 brushes included in the proposal.
100765Board Decision Letter
5 passages
January 30, 2026 [[email protected]](mailto:[email protected]) Lana Myatt Senior Regulatory Analyst Nova Scotia Power Inc. P.O. Box 910 Halifax, NS B3J 2W5 Dear Ms. Myatt: M12508 – Nova Scotia Power Inc. (NS Power) CI C0080112: HYD...
AI summary NS Power has requested approval for a capital expenditure of $1,025,626 to re-insulate 42 of 44 rotor poles on Big Falls Unit 6's generator. The request was submitted in October 2025, and the Board has reviewed the application, including responses to Information Requests and a confidentiality request. The need for the work arose from an oil leak investigation in May 2025, which revealed broken insulation and recommended repairs.
high probability that issues will arise over the coming years with the remaining poles. In addition to this work, the report also recommended further work on the slip rings, brushes, and brush boxes. In response to IR-7, NS Power stated th...
AI summary NS Power recommended rewinding all 42 poles for long-term value, as replacing them later would cause additional costs and outages. The Board agrees, noting that replacing all poles now reduces uncertainty and increases reliability, and approves the $1,025,626 capital expenditure request.
, and the corresponding cost is justified. Accordingly, this will confirm that the Board has approved NS Power's request in the amount of $1,025,626, with respect to this capital expenditure request. The Board often asks about power genera...
AI summary The Board has approved NS Power's capital expenditure request of $1,025,626. NS Power explained that Unit 6 at Big Falls had significantly lower generation due to being out of service for most of 2023, 2024, and 2025, affecting economic impacts and generation comparisons with Unit 5.
ual run times. As a result, NS Power said a direct comparison between the two units is misleading, as Unit 5's higher production reflects increased utilization rather than normal operating conditions. The Board understands that there was s...
AI summary The Board acknowledges NS Power's explanation regarding the utilization differences between Unit 5 and Unit 6, but remains concerned about Unit 6's frequent outages and the significant year-to-year variations in generation output. The Board emphasizes the need for optimal economic operation of hydro-generating units.
NSEB APPROVAL SHEET Project Title: CI Number: C0080112 HYD Big Falls Unit 6 Rotor Re-Insulation Date: October 6, 2025 Expenditure Profile Type of Filing Year Budget Amount Project Estimate Capital Project Authorization X X Unforeseen and U...
AI summary The document outlines an approval sheet for the HYD Big Falls Unit 6 Rotor Re-Insulation project, including budget amounts for 2025, 2026, and 2027, and details on the type of filing such as Subsequent Approval Item and Authorization to Overspend (ATO).
99569Letter NSPI re: Application
3 passages
October 6, 2025 Crystal Henwood Regulatory Affairs Officer/Clerk Nova Scotia Energy Board 1601 Lower Water Street, 3rd Floor Halifax, NS B3J 3S3 Re: Capital Items Filed Outside the Quarter Package Dear Ms. Henwood: Enclosed for your review...
AI summary A document dated October 6, 2025, is submitted to Crystal Henwood of the Nova Scotia Energy Board for the review and approval of capital items filed outside the quarter package.
Unforeseen & Unbudgeted (U&U) Capital Items • CI C0080112 – HYD Big Falls Unit 6 Rotor Re-Insulation – $1,025,626$43,146 spent as at June 30, 2025 Partially Confidential
AI summary The document lists an unforeseen and unbudgeted capital item related to the re-insulation of the HYD Big Falls Unit 6 Rotor, with a total cost of $1,025,626 and $43,146 spent as of June 30, 2025. The item is partially confidential.
Request for Confidentiality Pursuant to Rule 12 of the Board Regulatory Rules, NS Power requests confidential treatment of certain portions of the material filed in support of the following Capital Work Orders: 1. CI C0080112 – HYD Big Fal...
AI summary NS Power requests confidential treatment for portions of a capital work order related to the HYD Big Falls Unit 6 Rotor Re-Insulation project. The request is based on the need to protect commercial information, prevent competitive disadvantage, and maintain fair pricing for customers.
100765Board Decision Letter
5 passages
January 30, 2026 [[email protected]](mailto:[email protected]) Lana Myatt Senior Regulatory Analyst Nova Scotia Power Inc. P.O. Box 910 Halifax, NS B3J 2W5 Dear Ms. Myatt: M12508 – Nova Scotia Power Inc. (NS Power) CI C0080112: HYD...
AI summary NS Power has requested approval for a capital expenditure of $1,025,626 to re-insulate 42 of 44 rotor poles on Big Falls Unit 6's generator. The request was made following the discovery of broken insulation during an oil leak investigation in May 2025. The Board has reviewed the application and approved a confidentiality request.
high probability that issues will arise over the coming years with the remaining poles. In addition to this work, the report also recommended further work on the slip rings, brushes, and brush boxes. In response to IR-7, NS Power stated th...
AI summary The document discusses NS Power's proposal to refurbish all 42 poles, including those not immediately failing, to avoid future costs and uncertainty. The Board agrees, finding the work necessary and the cost justified, approving a capital expenditure of $1,025,626.
, and the corresponding cost is justified. Accordingly, this will confirm that the Board has approved NS Power's request in the amount of $1,025,626, with respect to this capital expenditure request. The Board often asks about power genera...
AI summary The Board has approved a capital expenditure request by NS Power for $1,025,626. NS Power provided data showing that Unit 6 at Big Falls had significantly lower generation than Unit 5 due to being out of service for most of 2023, 2024, and 2025. The economic impact of this lower production depends on factors like water availability and unit utilization.
ual run times. As a result, NS Power said a direct comparison between the two units is misleading, as Unit 5's higher production reflects increased utilization rather than normal operating conditions. The Board understands that there was s...
AI summary The Board acknowledges NS Power's practice of rotating hydro units to balance run times but expresses concerns about Unit 6 being offline for extended periods and significant variations in generation output. The Board emphasizes the need for hydro units to operate at optimal economic levels consistently.
NSEB APPROVAL SHEET Project Title: CI Number: C0080112 HYD Big Falls Unit 6 Rotor Re-Insulation Date: October 6, 2025 Expenditure Profile Type of Filing Year Budget Amount Project Estimate Capital Project Authorization X X Unforeseen and U...
AI summary The document outlines a capital project authorization for the HYD Big Falls Unit 6 Rotor Re-Insulation with budget estimates for 2025, 2026, and 2027. It includes details on the type of filing and authorization to overspend.