Hydro Kennebec Project
Hydro power plant · Kennebec County, Maine
Nameplate capacity
15 MW
Rank in Maine
#53
of 274 plants
In service since
1989
January 1989
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Hydro Kennebec LLC
- County
- Kennebec County
- Generating units
- 2
- Share of state capacity
- 0.25%
- Rank among hydro plants in Maine
- #11 of 48
- EIA plant code
- 54148
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| GEN1 | Conventional Hydroelectric | 7.7 MW | 7.7 MW | 1989 | Operating |
| GEN2 | Conventional Hydroelectric | 7.7 MW | 7.7 MW | 1989 | 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
| Gulf Island | Hydro | 19 MW |
| Skelton | Hydro | 17 MW |
| RoxWind | Wind | 15 MW |
| Bonny Eagle | Battery storage | 15 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 15 MW solar plant and a 15 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