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Stillwater B

Hydro power plant · Penobscot County, Maine

Nameplate capacity
2.4 MW
Rank in Maine
#228
of 274 plants
In service since
2013
September 2013

Details

Primary fuel
Hydro
Technology
Conventional Hydroelectric
Operator
Brookfield Black Bear Hydro, LLC
County
Penobscot County
Generating units
3
Share of state capacity
0.04%
Rank among hydro plants in Maine
#35 of 48
EIA plant code
59437

Generating units

Individual generating units at Stillwater B
UnitTechnologyNameplateSummerOnlineStatus
SWB-1Conventional Hydroelectric0.8 MW0.8 MW2013Operating
SWB-2Conventional Hydroelectric0.8 MW0.8 MW2013Operating
SWB-3Conventional Hydroelectric0.8 MW0.8 MW2013Operating

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

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 2.4 MW solar plant and a 2.4 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