Construct Repository Cover to Support the Callahan Mine Superfund Site in Brooksville, Maine.

The U.S. Army Corps of Engineers, New England District, is seeking bids for the construction of a repository cover to support the Callahan Mine Superfund Site in Brooksville, Maine. The project involves installing a composite cap over an area of approximately 13 acres to limit infiltration through mine waste. The expected components of the composite cap include crushed stone, geocomposite drainage layer, textured geomembrane, and geofabric. Other activities to be performed under this contract may include installation of drainage features, grading, seeding and stabilization of disturbed areas, rock crushing, stockpile management, and wetland improvements. • The NAICS code for this project is 562910, with an estimated cost range of $5 million to $10 million. • The project is expected to be performed during peak months (Spring through Fall). • The solicitation requirements and contract documents will be available on or about mid-January 2026. • All responsible sources may submit a bid, which shall be considered by the New England District.