Grand Coulee Dam via the Pump-Generating Plant's diameter pipes from Lake Roosevelt to a feeder canal. From the feeder canal, the water is transferred to Banks Lake which has an active storage of . The plant's twelve 65,000–70,000 horsepower pumps can transfer up to to the lake. Currently, the Columbia Basin Project irrigates with a potential for . Over 60 different crops are grown within the project and distributed throughout the United States. Grand Coulee Dam supports four different power houses containing 33 hydroelectric generators. The original Left and Right Powerhouses contain 18 main generators and the Left has an additional three service
Grand Coulee Dam The dam's powerhouse began production around the time World War II began, and its electricity was vital to the war effort. The dam powered aluminum smelters in Longview and Vancouver, Washington, Boeing factories in Seattle and Vancouver, and Portland's shipyards. In 1943, its electricity was also used for plutonium production in Richland, Washington, at the Hanford Site, which was part of the top-secret Manhattan Project. The demand for power at that project was so great that in 1943, two generators originally intended for the Shasta Dam were installed at Grand Coulee to hurry the generator installation schedule. Water is pumped