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This document outlines a federal contract opportunity for repair work on a hydroelectric turbine generator unit. The U.S. Army Corps of Engineers, Walla Walla District is soliciting bids for repairs to seal leakage between the runner hub and turbine shaft connection of the Lower Monumental Dam Unit 2 in Franklin County, Washington. The scope of work involves sealing the outer diameter of the shaft flange where it meets the hub, installing welded caps on coupling bolts, and adding piping to routing leaking fluid back to the static oil head. Optional work may include installing new blade seals and a nose cone gasket. The project must be completed within 150 calendar days of the notice to proceed. Performance and payment bonds are required, and the estimated value is between $250,000 and $500,000. The solicitation will be an Invitation for Bids issued in accordance with FAR Part 14 and will result in a firm fixed-price contract.