Lower Granite Dam - Hydroelectric Project Information
General Information
- Dam:
- Lower Granite Dam. Snake River. River Mile 107.5
- Constructed:
- 1975 (units 1-3); additional units 4-6 completed in 1978
- Owner:
- U.S. Army Corps of Engineers, Walla Walla District
- Normal Operating Pool1:
- 733.0-738.0 feet
- Maximum Pool1:
- 746.5 feet
- Powerhouse Capacity:
- Nameplate capacity: 6 @ 135 MW, 810 MW total
- Overload capacity: 6 @ 155.3 MW, 932 MW total
- Hydraulic capacity: 130 kcfs
- Spillway:
- 512 feet, 8 gates
1 From USACE Walla Walla District, Digital Project Notebook Structural Details Map.
Additional Information
Lower Granite Dam web page. Contact U.S. Army Corps of Engineers, Walla Walla District for all additional information.