Description
The US Army Corps of Engineers, Walla Walla District is seeking interested business sources for a construction project entitled: McNary Downstream Miter Gate Replacement. The construction will occur at the McNary Dam location. This project involves the replacement of the existing two-leaf arch rib miter gate, mechanical equipment, and embedded pintle ball and sill beam. The magnitude of construction is estimated to be between $25,000,000 and $100,000,000.
• The gate leafs are 425 tons each, 53.5 feet wide, and 106 feet tall.
• The project requires fabrication and coating of the gate leafs in the shop and delivery to the site in one piece by barge.
• The gate weldment must be made of ASTM A709 Grade 50 steel and meet the AWS D1.5 Bridge Welding Code with some Fracture Critical Members (FCM).
• The project has a tentative schedule with contract award in April 2028, fabrication complete in December 2029, and site work window in January 2030 to April 2030.