This document provides details for a federal solicitation to replace two 90-inch butterfly valves and control unit systems at the Cougar Powerhouse. The solicitation was issued by the Department of the Army Corps of Engineers Engineering District Portland with number W9127N21R0005 for a construction project to improve the reliability and safety of the valves that shut off the penstock water supply to the turbines. The valves being replaced were originally installed in the early 1960s and the related systems have become increasingly problematic. The project aims to replace the two butterfly valves and control unit systems at the main generating units that use the valves to isolate each turbine.