Home / Power plants / Maine / S D Warren Westbrook

S D Warren Westbrook

Other power plant · Cumberland County, Maine

Nameplate capacity

70 MW

Rank in Maine

#19

of 274 plants

In service since

1940

January 1940

Details

Primary fuel: Other
Technology: Wood/Wood Waste Biomass
Operator: Relevate Power Management LLC
County: Cumberland County
Generating units: 16
Share of state capacity: 1.13%
Rank among other plants in Maine: #4 of 19
EIA plant code: 50447

Generating units

Individual generating units at S D Warren Westbrook
Unit	Technology	Nameplate	Summer	Online	Status
GEN9	Wood/Wood Waste Biomass	48 MW	41 MW	1982	Out of service and NOT expected to return to service in next calendar year
GN10	Wood/Wood Waste Biomass	15 MW	16 MW	1985	Out of service and NOT expected to return to service in next calendar year
GEN4	Conventional Hydroelectric	0.8 MW	0.8 MW	2013	Operating
GEN5	Conventional Hydroelectric	0.8 MW	0.8 MW	2013	Operating
GEN6	Conventional Hydroelectric	0.8 MW	0.8 MW	2013	Operating
GEN1	Conventional Hydroelectric	0.6 MW	0.6 MW	2003	Operating
GEN2	Conventional Hydroelectric	0.6 MW	0.6 MW	2003	Operating
GEN3	Conventional Hydroelectric	0.6 MW	0.6 MW	2003	Operating
GEN7	Conventional Hydroelectric	0.6 MW	0.6 MW	1940	Operating
GN11	Conventional Hydroelectric	0.6 MW	0.6 MW	1940	Operating
GN16	Conventional Hydroelectric	0.5 MW	0.5 MW	1940	Operating
GN17	Conventional Hydroelectric	0.5 MW	0.5 MW	1940	Operating
GN12	Conventional Hydroelectric	0.2 MW	0.2 MW	1940	Operating
GN13	Conventional Hydroelectric	0.2 MW	0.2 MW	1940	Operating
GN14	Conventional Hydroelectric	0.2 MW	0.2 MW	1940	Operating
GN15	Conventional Hydroelectric	0.2 MW	0.2 MW	1940	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

Weaver Wind	Wind	73 MW
Wyman Hydro	Hydro	72 MW
Woodland Pulp, LLC	Other	68 MW
Rollins Wind Project	Wind	60 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 70 MW solar plant and a 70 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