Little Mac Project
Hydro power plant · Twin Falls County, Idaho
Nameplate capacity
1.5 MW
Rank in Idaho
#145
of 155 plants
In service since
1984
May 1984
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Little Mac Power Company
- County
- Twin Falls County
- Generating units
- 4
- Share of state capacity
- 0.02%
- Rank among hydro plants in Idaho
- #66 of 76
- EIA plant code
- 10049
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 2 | Conventional Hydroelectric | 0.4 MW | 0.4 MW | 1984 | Operating |
| 3 | Conventional Hydroelectric | 0.4 MW | 0.4 MW | 1984 | Operating |
| 4 | Conventional Hydroelectric | 0.4 MW | 0.4 MW | 1984 | Operating |
| 1 | Conventional Hydroelectric | 0.3 MW | 0.3 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
| Clif Bar Bakery of Twin Falls | Solar | 1.6 MW |
| Marsh Valley Development | Hydro | 1.6 MW |
| Mile 28 Water Power Project | Hydro | 1.4 MW |
| Blind Canyon Hydro | Hydro | 1.3 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 1.5 MW solar plant and a 1.5 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