Twin Falls (ID)
Hydro power plant · Twin Falls County, Idaho
Nameplate capacity
53 MW
Rank in Idaho
#32
of 155 plants
In service since
1935
March 1935
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Idaho Power Co
- County
- Twin Falls County
- Generating units
- 2
- Share of state capacity
- 0.80%
- Rank among hydro plants in Idaho
- #11 of 76
- EIA plant code
- 821
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 2 | Conventional Hydroelectric | 44 MW | 42 MW | 1995 | Operating |
| 1 | Conventional Hydroelectric | 8.4 MW | 10 MW | 1935 | 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 Idaho
| Milner Hydro | Hydro | 60 MW |
| Horse Butte Wind I, LLC | Wind | 58 MW |
| Albeni Falls | Hydro | 42 MW |
| Anderson Ranch | Hydro | 40 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 53 MW solar plant and a 53 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