Construct Repository Cover to Support the Callahan Mine Superfund Site in Brooksville, Maine.
This contract involves constructing a composite repository cover over approximately 13 acres at the Callahan Mine Superfund Site in Brooksville, Maine. The primary work is installing a multi-layer cap to limit water infiltration into historical copper mine waste. The cap's specified components include, from the surface down: crushed stone, a geocomposite drainage layer, a textured geomembrane, and geofabric. Additional activities may include installing drainage features, grading, seeding, stockpile management, and wetland improvements.