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Rock Creek I

Hydro power plant · Twin Falls County, Idaho

Nameplate capacity
2.1 MW
Rank in Idaho
#135
of 155 plants
In service since
1983
September 1983

Details

Primary fuel
Hydro
Technology
Conventional Hydroelectric
Operator
Shorock Hydro Inc
County
Twin Falls County
Generating units
1
Share of state capacity
0.03%
Rank among hydro plants in Idaho
#61 of 76
EIA plant code
50987

Generating units

Individual generating units at Rock Creek I
UnitTechnologyNameplateSummerOnlineStatus
GEN1Conventional Hydroelectric2.1 MW2.0 MW1983Operating

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 Idaho

MC6 Hydro FacilityHydro2.3 MW
Cargill B6 BiofactoryOther2.2 MW
Filer BESSBattery storage2.0 MW
Melba BESSBattery storage2.0 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 2.1 MW solar plant and a 2.1 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 Idaho power plants · What Idaho actually generates