The U.S. Army Corps of Engineers, St. Paul District, is seeking a contractor to install a new prefabricated, four-room, ADA-accessible restroom and shower building with a 10,000-gallon septic holding tank at Blackhawk Park Upper Campground near De Soto, Wisconsin. The project budget is estimated between $250,000 and $500,000, and the resulting contract will be firm fixed-price. This opportunity is 100% set aside for small businesses under NAICS code 238120. The solicitation will be issued as an Invitation for Bid (IFB) via SAM.gov, with specifications detailed in the solicitation. Offerors must be registered in SAM prior to award.