The U.S. Army Corps of Engineers, New England District, plans a 100% Small Business Set-Aside contract to construct a composite repository cover at the Callahan Mine Superfund Site in Brooksville, Maine. The work involves installing a multi-layer cap over approximately 13 acres of consolidated mine waste, along with associated drainage, grading, and site stabilization activities. Performance is expected during the peak months of Spring through Fall. The official solicitation will be available online around mid-January 2026. No budget information is specified in this presolicitation notice.