This unrestricted, firm-fixed-price contract covers demolition and construction of a Wastewater Treatment Plant at Rough River Lake, with performance estimated at 400 calendar days from Notice to Proceed. Award will be based on Lowest Evaluated Price under NAICS 237110, and a 10% HUBZone price evaluation preference will apply. Offerors must maintain active SAM registration, and any joint venture must have valid SAM registration as a JV entity to be eligible for award. The solicitation will be available electronically only through SAM.gov and the PIEE Solicitation Module, and offerors are responsible for monitoring those sites for amendments. Paper copies, telephone requests, and fax requests will not be honored.