Rock Island Dam - Hydroelectric Project Information
General Information
- Dam:
- Rock Island Dam. Columbia River. River Mile 453.4
- Constructed1:
- 1933, 6 additional units completed 1953, Second Powerhouse completed 1979
- Owner:
- Chelan County PUD No. 1
- Normal Full Pool:
- 613.0 feet
- Normal Minimum Pool:
- 609.0 feet
- Powerhouse Capacity1:
- First Powerhouse Nameplate capacity: 3 @ 20.7 MW, 1 @ 15 MW, 6 @ 22.5, 212 MW total
- Second Powerhouse Nameplate capacity: 8 @ 51.3 MW, 410.4 MW total
- Total Nameplate capacity: 622.5 MW total
- Peak capacity: 660 MW total
- Spillway1:
- 31 gates (14 east, 17 west)
1 From Chelan County PUD, Rock Island Hydroelectric Project Pamphlet.
Additional Information
Contact Chelan County PUD for detailed information and history.
