Great Lakes Hydro America - ME
Hydro power plant · Penobscot County, Maine
Nameplate capacity
158 MW
Rank in Maine
#8
of 274 plants
In service since
1930
July 1930
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Great Lakes Hydro America LLC
- County
- Penobscot County
- Generating units
- 33
- Share of state capacity
- 2.56%
- Rank among hydro plants in Maine
- #1 of 48
- EIA plant code
- 54134
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| MCH3 | Conventional Hydroelectric | 13 MW | 13 MW | 1967 | Operating |
| MCH1 | Conventional Hydroelectric | 12 MW | 12 MW | 1953 | Operating |
| MCH2 | Conventional Hydroelectric | 12 MW | 12 MW | 1953 | Operating |
| BES1 | Batteries | 10 MW | 9.4 MW | 2020 | Operating |
| BES2 | Batteries | 10 MW | 9.4 MW | 2020 | Operating |
| MIH2 | Conventional Hydroelectric | 5.5 MW | 5.3 MW | 2017 | Out of service and NOT expected to return to service in next calendar year |
| MIH3 | Conventional Hydroelectric | 5.5 MW | 5.3 MW | 2017 | Operating |
| MIH8 | Conventional Hydroelectric | 5.4 MW | 5.1 MW | 1987 | Operating |
| MIHI | Conventional Hydroelectric | 5.4 MW | 5.1 MW | 1987 | Operating |
| DOH5 | Conventional Hydroelectric | 5.3 MW | 5.0 MW | 1988 | Operating |
| MIH4 | Conventional Hydroelectric | 5.1 MW | 5.5 MW | 2017 | Operating |
| MIH5 | Conventional Hydroelectric | 5.1 MW | 4.9 MW | 2021 | Operating |
| MIH6 | Conventional Hydroelectric | 5.1 MW | 4.9 MW | 2021 | Operating |
| WEH1 | Conventional Hydroelectric | 4.8 MW | 4.6 MW | 1940 | Operating |
| WEH2 | Conventional Hydroelectric | 4.8 MW | 4.6 MW | 1940 | Operating |
| WEH3 | Conventional Hydroelectric | 4.8 MW | 4.6 MW | 1940 | Operating |
| WEH4 | Conventional Hydroelectric | 4.8 MW | 4.6 MW | 1940 | Operating |
| DOH6 | Conventional Hydroelectric | 4.1 MW | 3.9 MW | 1975 | Operating |
| DOH7 | Conventional Hydroelectric | 4.1 MW | 3.9 MW | 1975 | Operating |
| MIH7 | Conventional Hydroelectric | 4.0 MW | 5.5 MW | 2021 | Operating |
| NOH1 | Conventional Hydroelectric | 3.2 MW | 3.0 MW | 1986 | Operating |
| NOH2 | Conventional Hydroelectric | 3.2 MW | 3.0 MW | 1986 | Operating |
| NOH3 | Conventional Hydroelectric | 3.2 MW | 3.0 MW | 1986 | Operating |
| DOH8 | Conventional Hydroelectric | 3.0 MW | 3.4 MW | 1930 | Operating |
| DOH4 | Conventional Hydroelectric | 1.8 MW | 1.8 MW | 2025 | Out of service and NOT expected to return to service in next calendar year |
| EMH1 | Conventional Hydroelectric | 1.6 MW | 1.5 MW | 1948 | Operating |
| EMH2 | Conventional Hydroelectric | 1.6 MW | 1.5 MW | 1948 | Operating |
| EMH3 | Conventional Hydroelectric | 1.6 MW | 1.5 MW | 1948 | Operating |
| EMH4 | Conventional Hydroelectric | 1.6 MW | 1.5 MW | 1948 | Operating |
| EMH5 | Conventional Hydroelectric | 1.6 MW | 1.5 MW | 1948 | Operating |
| EMH6 | Conventional Hydroelectric | 1.6 MW | 1.5 MW | 1948 | Operating |
| DOH2 | Conventional Hydroelectric | 1.3 MW | 1.3 MW | 2025 | Out of service and NOT expected to return to service in next calendar year |
| DOH3 | Conventional Hydroelectric | 1.3 MW | 1.3 MW | 2025 | Out of service and NOT expected to return to service in next calendar year |
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
| Bingham Wind | Wind | 186 MW |
| Cross Town Energy Storage | Battery storage | 175 MW |
| Oakfield Wind Project | Wind | 148 MW |
| Kibby Wind Facility | Wind | 132 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 158 MW solar plant and a 158 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