Spaulding 3
Hydro power plant · Nevada County, California
Nameplate capacity
6.6 MW
Rank in California
#927
of 1,897 plants
In service since
1929
February 1929
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Pacific Gas & Electric Co.
- County
- Nevada County
- Generating units
- 1
- Share of state capacity
- 0.01%
- Rank among hydro plants in California
- #144 of 244
- EIA plant code
- 283
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 6.6 MW | 5.8 MW | 1929 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in California
| MM West Covina | Other | 6.8 MW |
| South | Hydro | 6.7 MW |
| SunSelect1 | Natural gas | 6.6 MW |
| WWTP Power Generation Station | Other | 6.6 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 6.6 MW solar plant and a 6.6 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All California power plants · What California actually generates