N-2NSPML (BW) RIRs 1-22 - Redacted
7 passages
2.2 Selection of Optimum Return Period The initial line cost (LCOS) will increase as the reliability increases, and the future failure cost (DCOST) will decrease as line reliability increases. An optimum reliability can be found by balanci...
AI summary The text discusses balancing initial line costs (LCOS) and future failure costs (DCOST) to determine optimal reliability for a HVdc transmission system. It references studies by Haldar and others, emphasizing probabilistic models, risk assessment, and the impact of the Maritime link on risk reduction. The Avalon upgrade study highlights the need for economic justification of reliability improvements, including customer interruption costs.
NON-CONFIDENTIAL 1 experience material cost overruns and schedule delays, often exceeding initial budget estimates by significant margins and extending timelines by multiple years. 1 2 Date Filed: April 21, 2026 NSPML (BW) IR-19 Page 2 of...
AI summary The document highlights significant cost overruns and schedule delays in projects, citing a 2021 study on hydropower cost overruns. NSPML (BW) IR-19 references these issues, emphasizing discrepancies between initial budgets and actual project costs.
3.1.3 Discussion The introduction of a mid-span tower between S4-501 (2468) and S4-502 (2469) provides significant reduction to the wind and weight spans for icing cases however does not address all structural overstresses in the peak memb...
AI summary Adding a mid-span tower between S4-501 and S4-502 reduces icing-related stresses but fails to resolve all structural overstresses, requiring reinforcement of S4-502. However, reinforcing S4-502 alone is more economical than installing the mid-span tower due to high construction costs in a wet low-lying area.
3.1.1 Method 1: Emergency Work Data Locke's Electrical Original Estimate = $1,286,374.75 Length of Line Considered in Original Estimate = 5.93 km Estimated Emergency Factor = 1.5 Labor Cost/km = $144,691.99 The emergency work excluded mate...
AI summary This section provides an estimate of the costs associated with emergency work on a power line, including labor, materials, and mobilization/demobilization costs, with inflation factors applied to current estimates.
Table 1: Previous Construction Data Cost Estimate Item Unit Price #Units Cost Mobilization LS Refer to Section 3.1.1 Demobilization LS Refer to Section 3.1.1 Tree Clearing $0.00 Snow Clearing $0.00 Excavation Class A (Rock) $980.00 180 $23...
AI summary Table 1 presents a cost estimate for construction activities, including mobilization, excavation, pole installation, and framing. It also includes inflation factors and a total cost estimate of approximately $873,379.68 per kilometer plus $560,000. Section 3.2 discusses Option 2, which involves midspan structures installation.
4.1 Option 1: Wood Pole Line Installation The two methods utilized to develop cost estimates for Option 1: Wood Pole Line Installation result in total costs of $262,663.58/km and $313,379.68/km (+ mob and demob) respectively. These two val...
AI summary Option 1: Wood Pole Line Installation has two cost estimates ($262,663.58/km and $313,379.68/km) influenced by inflation factors, emergency markup, and assumptions about pole density. Uncertainty in emergency quotes and potential outage impacts during construction are noted as key considerations.
4.2 Option 2: Midspan Structures Installation The cost of installing new midspan structures is approximately $328,662.00 per tower + $315,000.00 + $700,000.00 . Assumptions were made in the development of this estimate which can be reviewe...
AI summary The cost of installing midspan structures is approximately $1.3 million per tower, factoring in inflation and structure type assumptions. Construction may require outages on the Labrador-Island Link (LIL), potentially adding $500,000/day in costs, necessitating further investigation into feasibility and financial impacts.
N-4NSPML (IG) RIRs 1-26 - Redacted
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NON-CONFIDENTIAL - ii) The costs are from NSPML's regulated financial statements for 2023 and 2024. - iii) The reference to the "approximately 19 percent" figure is derived from total customer sales by NS Power in 2023, 2024 and 2025 (FAM...
AI summary The text references costs from NSPML's 2023 and 2024 financial statements and mentions a 19 percent figure derived from NS Power's customer sales compared to energy purchases in 2023, 2024, and 2025.
PARTIALLY CONFIDENTIAL - Capacity of the NS Block has been at a level that allows NS Power (and now the IESO-NS) to treat the NS Block in the same manner as its other generation assets for short-, mid- and long-term planning. Yes, there ha...
AI summary NSPML argues that the NS Block's capacity is integrated with Nova Scotia's generation assets, resulting in minimal outage impacts and benefits exceeding costs. It notes that planned outages by NLH during non-winter periods have not caused system outages and that the holdback is tied to the Lower Churchill Project's performance.
5.1.2 Remove Electrode Line Conductor from Towers and Install on Wood Poles - This alternative would remove the EL from towers and install on a wood pole line. In addition to - reducing the ice loads on the towers, there are several other...
AI summary The alternative proposes removing the electrode line conductor from towers to wood poles, reducing ice loads and facilitating repairs, but requires a new right-of-way and does not address OPGW issues. Estimated costs are around $101,562 per tower.
5.1.4 Reinforcement and Re-design of OPGW Peaks and EL Crossarms - This alternative would include replacing the existing electrode crossarms and OPGW peak with new - reinforced sections and adding reinforcing members to the existing cage....
AI summary This section discusses reinforcing OPGW peaks and EL crossarms with new reinforced sections and additional members to address ice load issues from past events. The reinforcement can be installed during monopole outages at a relatively low cost per structure, though it does not resolve electrode conductor failures. Estimated costs are $36,000 per structure for both components and $29,000 for only the crossarm.
5.2 Recommended Alternative - The recommended alternative is the Reinforcement and Re-design of OPGW Peaks and EL Crossarms - with Re-design of the EL Assembly for most sections, with two exceptions. The combination of these - alternatives...
AI summary The recommended alternative involves reinforcing and redesigning OPGW peaks and EL crossarms, with exceptions in specific sections due to higher icing and existing infrastructure. This approach is deemed more cost-effective than alternatives like mid-span structures or removing conductor.
Wood Pole and Mid‐Span Cost Estimates Summary
AI summary This document provides a summary of cost estimates for wood pole and mid-span components, though no detailed analysis or specific figures are included in the provided text. The focus appears to be on infrastructure-related expenditures within the Nova Scotia utility sector.
Wood Pole and Mid-Span Cost Estimates Summary
AI summary This document summarizes cost estimates for wood poles and mid-span components in a Nova Scotia regulatory proceeding. However, the provided text lacks specific details, so the summary reflects the general context of the proceeding.
3.1.1 Method 1: Emergency Work Data Locke's Electrical Original Estimate = $1,286,374.75 Length of Line Considered in Original Estimate = 5.93 km Estimated Emergency Factor = 1.5 Labor Cost/km = $144,691.99 The emergency work excluded mate...
AI summary The text provides detailed cost estimates for emergency work on an electrical line, including labor, material, and mobilization/demobilization costs, with inflation factors applied to adjust for current pricing.
Table 1: Previous Construction Data Cost Estimate Item Unit Price #Units Cost Mobilization LS Refer to Section 3.1.1 Demobilization LS Refer to Section 3.1.1 Tree Clearing $0.00 Snow Clearing $0.00 Excavation Class A (Rock) $980.00 180 $23...
AI summary Table 1 provides a detailed breakdown of construction costs for various items related to infrastructure projects, including mobilization, excavation, pole installation, and framing. The table also includes estimated inflation factors and total costs, with a note that the total cost includes additional amounts per kilometer and a fixed sum.
4.1 Option 1: Wood Pole Line Installation The two methods utilized to develop cost estimates for Option 1: Wood Pole Line Installation result in total costs of $262,663.58/km and $313,379.68/km (+ mob and demob) respectively. These two val...
AI summary Option 1: Wood Pole Line Installation has two cost estimates ($262,663.58/km and $313,379.68/km) due to factors like inflation assumptions (general 2x, wood 1.3x), an emergency work markup (1.5x), and pole density estimates. Emergency work uncertainty and potential outage impacts from construction are noted as additional considerations.
4.2 Option 2: Midspan Structures Installation The cost of installing new midspan structures is approximately $328,662.00 per tower + $315,000.00 + $700,000.00 . Assumptions were made in the development of this estimate which can be reviewe...
AI summary The installation of midspan structures for the Labrador-Island Link (LIL) is estimated at $328,662 per tower, with assumptions including a 2x inflation factor and A1 structure type. Potential outages during construction could incur $500,000/day costs, requiring further investigation to assess feasibility and financial impacts.
Conclusion In conclusion the preliminary data suggests that out of these two options the most cost effective approach would be to install a dedicated wood pole electrode line near the existing transmission line in identified high risk zone...
AI summary The conclusion recommends installing a dedicated wood pole electrode line near existing transmission lines in high-risk zones as the most cost-effective solution, with costs estimated at $313,379.68/km + $560,000. Further analysis of assumptions, PLS-CADD models, and constructability factors is advised.
2. Sections for Consideration Due to the cost of building a wood pole line from Muskrat Falls to the start of the existing wood pole electrode line at structure 1229 (approximately 376 km), the removal of the electrode line from L3501/2 wi...
AI summary The document outlines the consideration of removing sections of the electrode line (L3501/2) due to high costs and factors like past failures, high icing, elevation, and galloping risks. Six sections totaling 85 km are recommended for removal based on these criteria.
3.1.5 Economic Aspects of the Thermal Design When designing a power cable it is attempting to reduce the conductor size as much as possible in order to reduce the tender price. This design method results in the smallest conductor meeting t...
AI summary The text discusses balancing initial capital expenditures (Capex) against long-term operational costs (Opex) in power cable design. Smaller conductor sizes reduce upfront costs but increase losses over time, requiring a present value analysis of future losses. A formula for calculating annual losses (QL) is provided, with assumptions based on copper pricing.
Cable utilization . The utilization of a submarine cable link depends largely on the type of the application (cf. Table 3.8). For a specific cable link the utilization may vary largely from week to week and over the years. Recycling costs/...
AI summary The text discusses factors influencing submarine cable utilization and recycling, including the trade-off between capital and operational expenditures, the impact of energy prices on conductor size selection, and the potential value of copper recovery post-cable life. Larger conductor sizes may be more economically beneficial in the long term, especially with rising energy prices and metal values.
7.2.3.3 Simultaneous or Post-Lay Burial? Ploughs and water-jetting equipment can be used for simultaneous laying and burial of the cable, or for post-lay burial (PLB). A PLB operation can be performed at convenient occasion after the cable...
AI summary The text compares simultaneous and post-lay burial methods for submarine cable installation. Simultaneous burial reduces cable damage risks but slows operations and increases costs, especially with high-day-rate vessels. Post-lay burial is more economical but risks damage during the unprotected period. Economic trade-offs depend on vessel type, with laying barges being slower but allowing better trenching synchronization. The 'bathtub' method is proposed for tidal flats.
N-5NSPML (NSEB) RIRs 1-19 - Redacted
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NSPML Responses to NSEB Information Requests 1 Request IR-01: 5 practice) for the weighted average cost of capital to be returned if the applicable holdback 6 funds are returned. 7 8 The holdback funds (by design) were withheld from NSPML'...
AI summary NSPML responds to NSEB information requests regarding the weighted average cost of capital (WACC) and NS Block Deliveries. It explains that holdback funds were withheld from assessment payments and that the impact of WACC on customers is unchanged if the funds are returned. It also provides a response regarding NS Block Deliveries, referencing a chart and appendix for further details.
NSPML Application to Review the Holdback Mechanism (NSEB M12696) NSPML Responses to NSEB Information Requests 1 Request IR-03: 28 in turn share with the appropriate parties, including the NSIESO. 1 iii) The annual planned maintenance outag...
AI summary NSPML responded to NSEB information requests regarding the Holdback Mechanism application. They provided detailed information about planned maintenance outages and corrected a minor discrepancy in the WACC value used in Appendix B of the application, noting that no numerical adjustments are required.
PARTIALLY CONFIDENTIAL 1 In terms of Purchased Energy volume, the average offered by NLH in the first three years was 2 approximately per year; however, the qualifying EAA quantities have been impacted by 3 various items including low hydr...
AI summary The text discusses NS Power's purchase of energy from NLH based on economic factors, the impact of low hydrology and deferred energy balances on EAA quantities, and the capacity benefits provided by the Maritime Link. Pricing assumptions are based on MassHub forecasts from 2013-2040.
rates of all other generating units to derive the LOLH expectation target. Based upon the Strategist ® analysis, the LOLH target is not exceeded until 2036 requiring additional capacity in 2036‐2037. To eliminate the hours of exposure to z...
AI summary The text discusses the LOLH expectation target derived from the Strategist ® analysis, indicating that the target is not exceeded until 2036. It also evaluates the cost and impact of adding combustion turbines incrementally to manage exposure to unsupplied load in the event of a permanent bipole outage, showing that incremental additions are more cost-effective than a wholesale 800 MW plant.