Key facts: Grand Coulee
Type of dam |
Concrete gravity |
Location |
Columbia river, Washington state |
Dates of construction |
1933-41, 1967-74 – third power plant |
Total length of dam(axis) |
1592m |
Length of main dam |
1178m |
Length of forebay dam |
357m |
Length of wing dam |
57m |
Height |
167m |
Spillway width |
503m |
Total concrete content |
9.2Mm3 |
Total rock excavation |
5.4Mm3 |
Max concrete pour (1 month) |
410,080m3 |
Area |
33,306ha |
Length |
243km |
Total capacity |
11,577m3 x 106 |
Maximum elevation (asl) |
393m |
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