San Joaquin 3
Hydro power plant · Madera County, California · not currently in service
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Pacific Gas & Electric Co.
- County
- Madera County
- Generating units
- 1
- Share of state capacity
- 0.00%
- Rank among hydro plants in California
- #175 of 244
- EIA plant code
- 277
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 3 | Conventional Hydroelectric | 4.0 MW | 4.2 MW | 1923 | Out of service and NOT expected to return to service in next calendar year |
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
| River Ranch Dairy | Solar | 4.0 MW |
| Rutan | Solar | 4.0 MW |
| UC Riverside Lots 30 & 32 | Solar | 4.0 MW |
| Waste Mangement Redwood LFGTE | Other | 4.0 MW |
About this data
From EIA’s inventory of operable generators, June 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 4.0 MW solar plant and a 4.0 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