The U.S. Army Corps of Engineers has awarded a $15.8 million contract to Garco Construction Inc. to perform spillway gate lifecycle maintenance at the 2,620-MW Chief Joseph hydroelectric plant in Washington.
The Corps' Seattle District most recently solicited bids for the work in February.
The contract will see Garco Construction perform work on Chief Joseph's 19 spillway gates, which measure 60 feet tall by 35 feet wide. Work includes replacement of wire rope and gate seals, gate recoating, gearbox inspection and rehabilitation, design and fabrication of rail system and trolley systems, cathodic protection, flushing and oil replacement in seal heaters, removal of backing bars and weld repairs.
The project, located on the Columbia River, is currently undergoing a number of rehabilitation projects. The Corps took information last year to supply a fire suppression system and thrust bearing coolers.