89th largest plant in California · 1203rd nationally
Collierville Powerhouse is a hydroelectric power plant in California with a nameplate capacity of 253 MW. It generates roughly 978.2k MWh per year — enough to power about 93,161 average U.S. homes.
Its capacity factor of 44% puts it in the middle range — running steadily but not full-time.
| Plant Name | Collierville Powerhouse |
|---|---|
| Operator | Northern California Power Agny |
| City | Murphys |
| County | Calaveras County |
| State | California |
| ZIP | 92547 |
| Coordinates | 38.14464, -120.38050 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | Water | 127 MW | Operating | 1989 |
| GEN2 | Conventional Hydroelectric | Water | 127 MW | Operating | 1989 |
| Owner | Location | Share |
|---|---|---|
| Calaveras County Water Dist | San Andreas, CA | 10000.0% |
Ownership reported to EIA Form 860. Percentages reflect reported generator-level ownership share, averaged when a plant has multiple generators.
| NERC Region | WECC |
|---|---|
| Balancing Authority | California Independent System Operator |
Hydroelectric plants spin turbines using falling or flowing water — typically from a dam-impounded reservoir. They are dispatchable, long-lived, and emission-free at the point of generation, though large reservoirs can disrupt rivers and ecosystems and methane can be released from flooded vegetation.