AI-generated summary
· Application · 05/04/2026
Nova Scotia Power filed a Planned & Advanced capital project application seeking NSEB approval for $2,431,095 in completed transmission works to mitigate Aeolian vibration damage on the L7005 Canso Strait crossing.
AI summary
- Nova Scotia Power Incorporated submitted CI C0044172 as part of its Q1 2026 capital filings, seeking Regulatory Approval Processes for the fully completed L7005 Canso Crossing Vibration Mitigation project (total forecast: $2,431,095; all funds spent as at December 31, 2025), filed May 4, 2026 and signed by COO Dave Pickles (NSEB Approval Sheet, p. 1).
- The project addressed fatigue-related failures in vibration dampers first identified during a Q4 2021 routine inspection of the 1.4 km L7005 Canso Causeway crossing (commissioned July 2018), where Aeolian vibration and ice-galloping caused conductor strand damage and loss of structural fasteners from steel towers; a third-party conductor expert attributed the damage to site conditions exceeding original design assumptions (CI C0044172, pp. 1–2).
- The permanent solution — installation of 288 custom Preformed Line Products (PLP) dampers and 1,164 PLP airflow spoilers on structures 729–732 — was accelerated from its planned 2026 execution after additional conductor damage was discovered in a Q1 2025 inspection; installation was completed Q3 2025 (CI C0044172, p. 2).
- NSP justified the approach as more cost-effective than full conductor replacement (estimated at ~$2.5M and still requiring new dampers), with the largest cost components being contractor installation ($1,670,755), Kinectrics line monitoring/design/testing ($148,318), and materials including dampers and airflow spoilers ($145,405), plus administrative and vehicle overheads totalling ~$344,207 (CI C0044172, p. 3).
- The L7005 line forms part of the Cape Breton Export Corridor transporting energy to the Nova Scotia mainland, and crosses Highways 104 and 19, making conductor failure a public safety risk; NSP requested partial confidentiality over contract and materials pricing under Rule 12 of the Board Regulatory Rules to protect competitive procurement value for customers (Cover Letter, p. 3; CI C0044172, p. 2).
Disclaimer: This summary was generated by AI from the filings it describes. We take care to make it accurate, but errors are possible - and it isn't advice. Only the filings themselves are the record: if you're relying on something here, confirm it against the source documents or the Nova Scotia Energy Board's own record. Full disclaimer →
What was filed
Documents filed on this day
- N-1 CI C0044172 – L7005 Canso Crossing Vibration Mitigation - $2,431,095 - Redacted
- N-1(C) CI C0044172 – L7005 Canso Crossing Vibration Mitigation - $2,431,095 - Confidential
- 101854 Letter NSPI re:First Quarter 2026 Capital Items