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Located on the Columbia River in Washington , US , the Grand Coulee Dam has an installed capacity of 6,809MW . The dam is the lead component of the Columbia Basin Project , focused on providing irrigation , electricity , flood control , recreation , streamflow regulation along with metropolitan , navigator and environmental water supply across 671,000 acres in east central Washington . The dam , comprised of three hydroelectric plants and a pump generating plant , provides an average of 21bn kWh annually for distribution across Washington , Idaho , Oregon , California , Colorado , New Mexico , Wyoming , Nevada , Arizona and Utah .

NOVEMBER 2019