Ralston

Hydro power plant · Placer County, California

Nameplate capacity
79 MW
Rank in California
#329
of 1,897 plants
In service since
1966
October 1966

Details

Primary fuel
Hydro
Technology
Conventional Hydroelectric
Operator
Placer County Water Agency
County
Placer County
Generating units
1
Share of state capacity
0.07%
Rank among hydro plants in California
#48 of 244
EIA plant code
427

Generating units

Individual generating units at Ralston
UnitTechnologyNameplateSummerOnlineStatus
1Conventional Hydroelectric79 MW86 MW1966Operating

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

Shirk Energy StorageBattery storage80 MW
Pit 6Hydro79 MW
Rising Tree Wind FarmWind79 MW
Montezuma Wind IIWind78 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 79 MW solar plant and a 79 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