Sierra Pacific Sonora
Other power plant · Tuolumne County, California
Nameplate capacity
7.5 MW
Rank in California
#904
of 1,897 plants
In service since
2018
April 2018
Details
- Primary fuel
- Other
- Technology
- Wood/Wood Waste Biomass
- Operator
- Sierra Pacific Industries
- County
- Tuolumne County
- Generating units
- 1
- Share of state capacity
- 0.01%
- Rank among other plants in California
- #84 of 152
- EIA plant code
- 54517
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN3 | Wood/Wood Waste Biomass | 7.5 MW | 6.0 MW | 2018 | 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
| El Cajon Energy Storage | Battery storage | 7.5 MW |
| Plant No 1 Orange County | Other | 7.5 MW |
| Terra-Gen VG Wind LLC | Wind | 7.4 MW |
| USPS PV | Solar | 7.4 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 7.5 MW solar plant and a 7.5 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