Grand Coulee Dam - Hydroelectric Project Information

Grand Coulee Dam image

General Information

Dam:
Grand Coulee Dam. Columbia River. River Mile 596.6
Constructed:
1942; modified in 1974, 1982, and 1984
Owner:
U.S. Bureau of Reclamation
Normal Full Pool:
1290.0 feet
Normal Minimum Pool:
1208.0 feet
Powerhouse Capacity:
Nameplate capacity1: 18 @ 125 MW, 3 @ 600 MW, 3 @ 805 MW, 6465 MW total
Station service units: 3 @ 10 MW, 30 MW total
Pump/Generator units1: 2 @ 50.0 MW, 4 @ 53.5 314 MW total
Hydraulic capacity: 280 kcfs
Spillway:
11 Drum Gates, 40 Outlet Tubes (2 gates each outlet)

1 From U.S. Bureau of Reclamation, Grand Coulee Powerplants page.

Additional Information

These web pages provide information about the location, construction date, pool elevation, and powerhouse capacity of the major federal and non-federal hydroelectric projects in the Columbia Basin. All information is courtesy of U.S. Army Corps of Engineers, NWD unless otherwise noted. The information and images are from the Army Corps of Engineers 1989 publication, "Columbia River and Tributaries Review Study: Project Data and Operating Limits" unless otherwise noted. USACE makes no warranties concerning the accuracy, reliability, or suitability of the data for any particular purpose. Pages include links to the owners/operators hydroelectric project web sites with visitor/tour information and further information. The map and these web pages cover only the major federal and non-federal dams in the region.

Columbia Basin Research provides these web pages for informational purposes only. Columbia Basin Research is not affiliated with any hydroelectric project. Please contact the Owner/Operator for questions about operations, tours, and any other matter.
Thank you.