McNary Dam and Lake Wallula Quick Facts McNary Dam, Lake Wallula, and associated facilities are operated for Hydropower, ►Stream: Columbia River (RM 292) Navigation, Fish & Wildlife, Recreation, Water Quality, and Irrigation. ►Location: Umatilla, OR ►Owner: U.S. Army Corps of Engineers, Walla Walla District Navigation Recreation ►Authorized Purposes: Hydropower, McNary Dam navigation lock is the Nearly 17,000 acres of public lands surrounding Lake Navigation (1945 Rivers and Harbors Act) fourth of eight locks encountered in Wallula are utilized for recreation, wildlife habitat, and water- ►Other Purposes: Fish & Wildlife, Recreation, the Columbia-Snake Inland connected industry. Currently, there are about 2,400 acres Water Quality, Irrigation Waterway, a 465-mile river highway leased to state or local park agencies, 17 public boat launch ►Type of Project: Run-of-River that allows barge transport of facilities, and 8 commercial boat club facilities. commodities between the Pacific McNary Lock and Dam was authorized Dam Ocean and Lewiston, ID. In 2015, by Congress for power and navigation ►Completed: 1957 more than five million tons of cargo ►Height: 183 ft in the 1945 Rivers and Harbors Act. passed through the McNary lock. ►Length: 7,365 ft Construction began in 1947, and all ►Features: powerhouse, spillway, navigation turbine units were operational in 1957. lock, fish passage facilities Lake Wallula extends upstream of the ►Forebay Elevation Normal Operating Range: dam for 64 miles to Hanford and has 337–340 ft msl over 242 miles of shoreline. ►Spillway Capacity (max): 2,200,000 cfs Powerhouse Hydropower ►Generation Capacity: 980 MW, 14 Units McNary Dam has 14 turbine units Fish & Wildlife ►Hydraulic Capacity: 232,000 cfs and a total project capacity of 980 McNary Dam has two fish megawatts, enough to power about ladders—one on each shore—to 686,000 homes. The Corps and BPA provide a passage route for are collaborating to modernize the upstream-migrating fish, including turbines to improve power and adult salmon and steelhead, hydraulic capacity and incorporate Water Quality lamprey, sturgeon, shad, and the latest fish-friendly design. Water quality is monitored and others. Passage routes operated managed consistent with Clean for downstream-migrating fish are Water Act and state standards for the the spillway, two spillway weirs, health of aquatic species. During and a juvenile bypass system. spill for juvenile fish passage at the The McNary National Wildlife Refuge is owned and four Lower Columbia and four Lower managed by the U.S. Fish & Wildlife Service as part of the Snake River projects, the Corps larger Mid-Columbia River Refuge Complex. implements a Water Quality Program to manage total dissolved gas..