Folsom

Hydro power plant · Sacramento County, California

Nameplate capacity
199 MW
Rank in California
#136
of 1,897 plants
In service since
1955
May 1955

Details

Primary fuel
Hydro
Technology
Conventional Hydroelectric
Operator
U S Bureau of Reclamation
County
Sacramento County
Generating units
3
Share of state capacity
0.18%
Rank among hydro plants in California
#12 of 244
EIA plant code
441

Generating units

Individual generating units at Folsom
UnitTechnologyNameplateSummerOnlineStatus
1Conventional Hydroelectric66 MW72 MW1955Operating
2Conventional Hydroelectric66 MW72 MW1955Operating
3Conventional Hydroelectric66 MW72 MW1955Operating

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

Mariposa Energy ProjectNatural gas200 MW
WoodlandNatural gas199 MW
Riverside Energy Resource CenterNatural gas196 MW
Sandrini Solar 100Solar195 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 199 MW solar plant and a 199 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