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Grand Coulee Dam, Washington State

Location

North-central Washington State. About 75 miles (as the crow flies) west-northwest of Spokane. On Washington State Highway 174.

River

Columbia. The construction of the Grand Coulee Dam created Franklin D Roosevelt Lake.

Type Of Dam

Concrete gravity dam. A wide dam.

Statistics

Height: 550 feet.

Length at top: according to one source 4173 feet, according to another source 5223 feet.

Thickness at base: 500 feet.

Thickness at top: 30 feet.

Volume of concrete: according to one source about 270 million cubic feet, according to another source about 323 million cubic feet.

Length of Franklin D Roosevelt Lake: 150 miles.

Drainage area: 74,100 square miles.

Power production: nearly 6.5 million kilowatts.

Construction: 1933 - 1942; modified 1967 - 1974 and 1982 - 1988.

In The Area

Washington State

Dams

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Most recently modified 31-May-04