Topic:"Climate Adaptation" in M12619

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

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

2026 ACE Plan Appendix F Page 8 of 55 The Path to 2030 – 2025 Update Non-Confidential 1 2.0 INTRODUCTION 2 3 In its 2023 Annual Capital Expenditure (ACE) Plan Order (M11017) on September 12, 2023, the 4 Nova Scotia Utility and Review Board...

AI summary The document outlines Nova Scotia Power Inc.'s compliance with the Nova Scotia Utility and Review Board's (NSUARB) orders to update its 2030 obligations plan. It includes the 2030 Decarbonization Goals, the Province's Clean Power Plan, and the creation of the Independent Energy System Operator of Nova Scotia (IESO-NS). The updates are part of the 2025 Annual Capital Expenditure (ACE) Plan.

1 TABLE OF CONTENTS 2 3 1.0 INTRODUCTION .............................................................................................................. 6 4 1.1 Five-Year Reliability Plan Commitment.............................................

AI summary The document outlines a five-year reliability plan focusing on vegetation management, storm hardening, and targeted equipment upgrades. It emphasizes wildfire mitigation, corridor widening, and tree trimming to enhance grid resilience. Section 3.0 highlights the 2025 overview as the first year of the plan, while sections 4.0–4.5 detail vegetation management strategies and infrastructure improvements.

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.

2026 Annual Capital Expenditure (ACE) Plan (NSEB M12619) NSPI Responses to NSEB Information Requests 1 Request IR-75: 9 completed as part of the detailed design process. 10 11 (a) If not confirmed, please explain. 12 13 (b) If confirmed, p...

AI summary NSPI confirmed that a coastal flooding assessment was conducted for the Tufts Cove Shoreline Sheetpile Refurbishment Project, incorporating projected sea level rise impacts into the design in line with NS Power's Climate Adaptation Plan. The study was performed by DHI Water & Environment Inc. and is referenced in Attachment 1.

1.2 Scope of Work To support the design, DHI has completed the following tasks, which are detailed further in [Appendix A:](#page-190-0) - Water Level Analysis: Analyzed tides, storm surge, and total water levels using measured gauge data...

AI summary This section outlines the scope of work completed by DHI to support the design process, including water level analysis, sea level rise projections, offshore hindcast analysis, and wave modeling to determine design water and wave conditions for the project site.

2026 ACE Plan NSEB IR-78 Attachment 1 Page 3 of 23 REDACTED (CONFIDENTIAL INFORMATION REMOVED) - Design life: 50-years - Design event return period: 200-years - Encounter probability: 22% (associated with design life and design event retur...

AI summary The 2026 ACE Plan outlines a 50-year design life with a 200-year return period design event, 22% encounter probability, and assumes construction beginning in 2030. The design static water level is projected to be 2.14 m, CGVD2013, excluding freeboard and wave runup considerations.

2.2 Design Wave Conditions The offshore extreme wind and wave conditions were transformed to Tufts Cove using the MIKE21 Flexible Mesh (FM) Spectral Wave (SW) model. The model simulated a range of discrete event scenarios including combina...

AI summary The document discusses the use of the MIKE21 Flexible Mesh Spectral Wave model to simulate extreme wind and wave conditions at Tufts Cove, including return periods from 1 to 200 years and sea level rise projections up to 2100. The results for the 200-year return period event with SLR projected to 2080 are presented in figures for two directional bins.

2026 ACE Plan NSEB IR-78 Attachment 1 Page 4 of 23 REDACTED (CONFIDENTIAL INFORMATION REMOVED) order of 3.0 – 3.5 s. However, these waves are highly oblique to the shoreline, which would limit wave runup and overtopping. The 240° direction...

AI summary The text discusses wave characteristics for a 200-year return period event with 2080 sea level rise, noting wave heights and periods, and their orientation relative to the shoreline.

2026 ACE Plan NSEB IR-78 Attachment 1 Page 5 of 23 REDACTED (CONFIDENTIAL INFORMATION REMOVED) Figure 4 Design peak wave periods for a 200-year return period event with 2080 SLR

AI summary The document presents a figure illustrating the design peak wave periods for a 200-year return period event with 2080 sea level rise, as part of the 2026 ACE Plan NSEB IR-78 Attachment 1.

3 Conclusions and Recommendations A coastal study was completed to assess design water levels and design waves at the Tufts Cove Generating Station in Halifax, Nova Scotia. The study concluded the following: - 1. The design static water le...

AI summary A coastal study at Tufts Cove Generating Station determined design water levels and wave conditions. It recommends further analysis on wave runup and overtopping, and periodic re-evaluation of infrastructure implications due to evolving sea level rise projections.

Year Sea Level Rise (m) SSP8.5 – relative SLR 2020 0.06 2030 0.13 2040 0.21 2050 0.31 2060 0.41 2070 0.52 2080 0.64 2090 0.78 2100 0.91

AI summary The table presents projected sea level rise under the SSP8.5 scenario from 2020 to 2100, showing a steady increase in meters. This data is likely used for climate adaptation planning and infrastructure resilience assessments.

Measured Water Levels Bedford Institute (CHS Station 00491)

AI summary The document includes visual representations of measured water levels at the Bedford Institute (CHS Station 00491), likely related to hydrological studies or climate change impact assessments.

RTP Surge Residual (m) Surge Residual + HHWLT (m, CCGV2013) Total Water Level (surge + tide) (m CGVD2013) 1 0.80 1.53 1.11 5 1.00 1.73 1.28 10 1.10 1.83 1.36 25 1.23 1.96 1.46 50 1.32 2.05 1.53 100 1.42 2.15 1.61 200 1.52 2.25 1.69 Total W...

AI summary The table presents water level data for different return periods, including surge residual, surge residual plus high high water level (HHWLT), and total water level (surge + tide). These levels are measured in meters relative to the Canadian Geodetic Vertical Datum of 2013 (CGVD2013).

Static Design Water Level

AI summary The section discusses the concept of Static Design Water Level, which is crucial for infrastructure planning in coastal areas, particularly in the context of climate change and rising sea levels.

Wind Speed (m/s) in 30° bins - Return Period (years) 1 5 10 25 50 100 200 0 Central Est. 17.45 19.85 20.97 22.27 23.15 24.16 25.06 30 Central Est 17.25 19.88 21.11 22.55 23.52 24.64 25.65 60 Central Est. 17.81 20.81 22.20 23.81 24.90 26.14...

AI summary The document presents tables with wind speed data in 30° bins and seasonal wind speed data, each categorized by return periods ranging from 1 to 200 years. These data are likely used for assessing extreme weather events and their impacts on infrastructure or planning.

Wave Height (Hs, m) in 30° bins - Return Period (years) 1 5 10 25 50 100 200 0 Central Est 4.22 5.19 5.69 6.29 6.71 7.21 7.66 30 Central Est 2.43 3.00 3.30 3.66 3.91 4.21 4.48 60 Central Est 2.38 3.09 3.46 3.92 4.24 4.63 4.99 90 Central Es...

AI summary The text presents wave height (Hs, in meters) data binned at 30° intervals and seasonal wave height data, each categorized by return periods (years) ranging from 1 to 200 years. This data is relevant for understanding extreme wave conditions and their frequency in different directions and seasons.

M12619 - 2026 Annual Capital Expenditure Plan Opening Statement of Nova Scotia Power Incorporated Provided by Dave Pickles, Chief Operating Officer, Nova Scotia Power Incorporated Thank you, Chair and Members of the Board, for the opportun...

AI summary Nova Scotia Power Incorporated's 2026 Annual Capital Expenditure Plan (ACE Plan) proposes $702 million in capital spending, with a focus on improving reliability, safety, and preparing for the future. Investments include vegetation management, infrastructure upgrades, and storm hardening to reduce outages and enhance grid resilience.

Chris Milligan ([email protected]) 1 Undertaking U-5: C0060751 2024 Manhole Automatic Pumps Storm Hardening - Targeted Equipment Replacement and Upgrades Special Capital $ 18,495 $ 74,285 $ 55,790 - C0060003 AMO 85S Thermal Camera...

AI summary The document outlines various capital projects undertaken by Nova Scotia Power, including storm hardening initiatives, grid modernization efforts, and compliance projects. It details the costs and financial status of each project, highlighting expenditures and variances.

Request IR-78: - Page 177 states: "It is also recommended to complete a coastal study to determine the projected - sea level rise and associated impacts to the site. If study results differ from noted design - assumptions, the gathered inf...

AI summary The request asks whether a coastal study was completed as part of the detailed design process for a project, and if so, whether its findings were used to update assumptions and cost estimates related to sea level rise impacts, as well as how these findings align with NS Power's Climate Adaptation Plan.

a level rise will be incorporated into the project design. 2. Please describe how this aligns with NS Power’s Climate Adaptation Plan. Please explain what Attachment 2 is intended to represent. 1. Please explain how the cost estimates in A...

AI summary The text includes questions regarding project design alignment with NS Power’s Climate Adaptation Plan, cost estimates in Attachment 2, blade replacement in a turbine project, and the forecast capacity and utilization factors for TUC1. It also asks about blade inspection results and spare blade procurement.

NS POWER PANEL 471 Questions, (Murphy) 1 operating conditions of the system. 2 So we know that the operating 3 conditions of the overhead system have changed in terms of 4 the impact of the higher number of winds and gusts above 5 80 that...

AI summary The text discusses the impact of changing weather conditions, specifically increased wind and gusts, on the operating conditions of the overhead system. It references storms like Fiona and Lee and highlights the benefits of system investments despite these challenges, emphasizing reduced impacts and the prioritization of maintenance efforts.