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Commission approves cathodic protection system for Senator Thomas Norton City Pier
Summary
The Forward Conservation Commission approved an order of conditions for a cathodic protection system to limit corrosion of a 2017 steel bulkhead at Senator Thomas Norton City Pier, allowing temporary work in coastal resource areas and recommending May–June installation timing for epoxy work.
The Forward Conservation Commission on Feb. 3 approved an order of conditions for a cathodic protection system designed to limit corrosion at the Senator Thomas Norton City Pier.
The project, filed as Notice of Intent 24-848 and presented on behalf of the redevelopment authority, calls for cleaning and recoating approximately 925 square feet of pier bulkhead, installing welded 3-inch interlock tabs, welding anode straps two feet below mean low water and applying Denso C Shield epoxy coatings in the splash and underwater zones. The applicant and consultant said the measures are intended to extend the bulkhead's service life by roughly 20 years and that the epoxy and diver work are likely to occur in May or June.
The applicant's presentation described a three-step approach: cleaning marine growth and loose rust, welding interlock tabs at the top of the sheet piles to establish electrical continuity, and applying a splash-zone epoxy and underwater epoxy below the mean low water line. Consultants said anodes (sacrificial units) will be consumed over time and will require periodic replacement; the team recommended inspection about every five years. The presenters estimated about 925 square feet of temporary impacts to coastal bank during construction and said no permanent resource-area impacts were anticipated.
Commission members took questions about whether welding the interlocks would affect the sheet piles' ability to move; the consultant said the work is limited to the top of the piles and is not expected to reduce performance. Marine fisheries provided comments that prompted discussion of containment and turbidity; the project team said the work will use light pressure washing and scraping to preserve existing coatings and limit turbidity.
A motion to issue an order of conditions passed by roll call.
The commission did not set a more precise construction window beyond the presenters' May–June epoxy schedule. The order of conditions requires any further design or staging information to be filed before work begins and preserves any conditions raised by marine fisheries and the commission.
The filing is listed as Notice of Intent 24-848; the commission recorded the application and approved the order of conditions at the meeting.
