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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 leaks 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, adding welded caps to coupling bolts, and piping at shaft jacking bolts to contain leaks. Optional work may include installing blade seals and a nose cone gasket. The contractor must complete all repairs, testing, and inspections within 150 calendar days of receiving notice to proceed. Performance and payment bonds are required. The estimated value of the contract 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.