South Forks Hydro
Hydro power plant · Twin Falls County, Idaho
Nameplate capacity
8.0 MW
Rank in Idaho
#100
of 155 plants
In service since
1984
December 1984
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- South Forks Joint Venture
- County
- Twin Falls County
- Generating units
- 2
- Share of state capacity
- 0.12%
- Rank among hydro plants in Idaho
- #38 of 76
- EIA plant code
- 10296
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | 4.0 MW | 4.0 MW | 1984 | Operating |
| GEN2 | Conventional Hydroelectric | 4.0 MW | 4.0 MW | 1984 | 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
| City Power Plant | Hydro | 8.0 MW |
| Lower No 1 | Hydro | 8.0 MW |
| Upper Power Plant | Hydro | 8.0 MW |
| Hazelton B Hydro | Hydro | 7.6 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 8.0 MW solar plant and a 8.0 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 Idaho power plants · What Idaho actually generates