Nameplate capacity
4.1 MW
Rank in Idaho
#112
of 155 plants
In service since
1990
August 1990
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Barber Pool Hydro LLC
- County
- Ada County
- Generating units
- 1
- Share of state capacity
- 0.06%
- Rank among hydro plants in Idaho
- #46 of 76
- EIA plant code
- 10735
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | 4.1 MW | 4.0 MW | 1990 | 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
| Dietrich Drop | Hydro | 4.8 MW |
| Island Park | Hydro | 4.8 MW |
| Elmore BESS | Battery storage | 4.0 MW |
| Milner Butte LFGE | Other | 3.9 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 4.1 MW solar plant and a 4.1 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