The US Army Corps of Engineers, Walla Walla District, is seeking sources for a construction project to replace the McNary Downstream Miter Gate, with performance at specified locations. The estimated budget is between $25,000,000 and $100,000,000, and the contract will be firm-fixed-price requiring 100% performance and payment bonds. The tentative schedule includes a contract award in April 2028, with fabrication complete by December 2029, and a 16-week site work window during the 2030 Columbia River Navigation Outage from January to April 2030. This is a sources-sought notice for market research only, not a solicitation, and responses are due by 3:00 PM on May 12, 2026, with feedback requested by May 29, 2026. Interested bidders must demonstrate capability to fabricate and deliver 425-ton gate leaves by barge, and install them within the specified outage window.