Ellsworth Hydro Station
Hydro power plant · Hancock County, Maine
Nameplate capacity
8.9 MW
Rank in Maine
#68
of 274 plants
In service since
1938
July 1938
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Brookfield Black Bear Hydro, LLC
- County
- Hancock County
- Generating units
- 4
- Share of state capacity
- 0.14%
- Rank among hydro plants in Maine
- #19 of 48
- EIA plant code
- 1469
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| EL01 | Conventional Hydroelectric | 2.5 MW | 2.6 MW | 2024 | Operating |
| EL04 | Conventional Hydroelectric | 2.4 MW | 2.5 MW | 2024 | Operating |
| EL02 | Conventional Hydroelectric | 2.0 MW | 2.1 MW | 1938 | Operating |
| EL03 | Conventional Hydroelectric | 2.0 MW | 2.1 MW | 1938 | 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 Maine
| Oxford PV - BD Solar Oxford LLC | Solar | 9.2 MW |
| Pisgah Mountain Wind | Wind | 9.1 MW |
| Shawmut | Hydro | 8.8 MW |
| Athens Energy | Other | 8.5 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 8.9 MW solar plant and a 8.9 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 Maine power plants · What Maine actually generates