The U.S. Army Corps of Engineers, Portland District, is soliciting a competitive firm-fixed-price construction MATOC for the repair and rehabilitation of two Tainter valves at John Day Lock and Dam. Work includes structural and weld repairs, seal and seal plate replacement, armor plate installation, bushing replacement, as-built surveys, and transporting the valves to and from an AISC-certified fabrication shop. The estimated period of performance is 321 days after Notice to Proceed, and the solicitation is anticipated for release around mid-August 2026. The estimated magnitude of construction is between $1,000,000 and $5,000,000. The acquisition is full and open competition under NAICS 237990, with performance primarily at the John Day Lock and Dam site and at a certified fabrication facility.