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In 1941, it was the largest hydroelectric power producing facility in the world. Learn how tension between technological success and environmental impact hangs over the dam. (Also at midnight; Sun.

Last year, the US Bureau of Reclamation turned operations of Grand Coulee's 115-kV, 230-kV and 500-kV switchyards over to the Bonneville Power Administration. The Grand Coulee Modernization Program in ...

Historic construction footage, photos, and newsreels help illustrate Grand Coulee Dam's construction, engineering challenges, and regional impact including power and irrigation. Produced by the Bureau ...