The 6,809MW Grand Coulee hydropower facility located on the Columbia River in Washington, is by far and away the biggest power station in the US. The plant is owned and operated by the US Bureau of Reclamation and has been in operation since 1941, it produced 26.46TWh of electricity in 2012.
The hydroelectric project consists of three power plants and a concrete gravity dam 168m high and 1,592m long. The first two power plants comprise of 18 Francis turbines rated at 125MW and three 10MW additional units, commissioned between 1941 and 1950. The third power plant consists of three 805MW units and three 600MW units commissioned between 1975 and 1980. In addition, the power station operates six peak generators totaling 314MW capacity.
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