Y--GRCA 257282 - Replace South Rim Wastewater Treatment Plant, Grand Canyon, AZ

The National Park Service Denver Service Center is soliciting proposals for the replacement of the South Rim Wastewater Treatment Plant at Grand Canyon National Park, Arizona. Originally listed as 140P2025R0093, the solicitation number has been updated to 140P2026R0101. This firm-fixed-price construction project involves the installation of a new 0.65 MGD Membrane Bio-Reactor wastewater treatment plant, which includes site preparation, demolition of existing infrastructure, utility connections, administrative buildings, and access road extensions. The project also requires a 12-month operational support period following construction. The anticipated period of performance is between 1,035 and 1,095 calendar days, accounting for potential winter construction and mandatory seasonal shutdowns during peak visitor periods. The procurement is a full and open competition under NAICS code 221320, with an estimated project magnitude exceeding 100 million dollars. Award will be based on a best-value trade-off analysis in accordance with FAR 15.101-1, evaluating technical approach, past performance, and price in descending order of importance. Offerors must be registered in SAM.gov with a valid Unique Entity ID and provide bid, performance, and payment bonds. Proposals are due by November 2, 2026, via electronic submission through SAM.gov. A pre-bid conference is scheduled for August 11, 2026, and the project requires strict adherence to protocols to minimize impacts on park visitors and protect natural and cultural resources.