Coulee Dam
Is the Grand Coulee dam located in the Okangoan highlands region?
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Grand Coulee Dam is a large hydroelectric dam located on the Columbia river in Central Washington. Made from 12 million cubic yards of concrete, Grand Coulee Dam is the largest concrete structure in the United States and the third largest hydroelectric facility in the world. Sharing the river with 10 other U.S. dams, Grand Coulee is the first dam encountered on the Columbia after the river enters the U.S from Canada. Lake Roosevelt, the reservoir created by the dam, contains 9 million acre-feet of water and streches over 150 miles back to the border.
The idea for damming the Columbia below the Grand Coulee was first proposed by Ephrata attorney William M. Clapp in the spring of 1917. The idea gained rapid support from the citizens of Ephrata and the surrounding area. Eventually the state government took an interest in the project as well.
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