19th largest plant in Maine · 3204th nationally
S D Warren Westbrook is a hydroelectric power plant in Maine with a nameplate capacity of 69.7 MW. It generates roughly 32.7k MWh per year — enough to power about 3,117 average U.S. homes.
Its capacity factor of 5% reflects intermittent or peaking operation.
| Plant Name | S D Warren Westbrook |
|---|---|
| Operator | Relevate Power Management Llc |
| City | Westbrook |
| County | Cumberland County |
| State | Maine |
| ZIP | 04098 |
| Coordinates | 43.68486, -70.35315 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| GEN9 | Wood/Wood Waste Biomass | Wood/Wood Waste | 47.5 MW | Out of Service | 1982 |
| GN10 | Wood/Wood Waste Biomass | Wood/Wood Waste | 15.0 MW | Out of Service | 1985 |
| GEN8 | Wood/Wood Waste Biomass | Wood/Wood Waste | 10.0 MW | Retired | 1965 |
| GEN4 | Conventional Hydroelectric | Water | 0.8 MW | Operating | 1913 |
| GEN5 | Conventional Hydroelectric | Water | 0.8 MW | Operating | 1913 |
| GEN6 | Conventional Hydroelectric | Water | 0.8 MW | Operating | 1913 |
| GEN1 | Conventional Hydroelectric | Water | 0.6 MW | Operating | 1903 |
| GEN2 | Conventional Hydroelectric | Water | 0.6 MW | Operating | 1903 |
| GEN3 | Conventional Hydroelectric | Water | 0.6 MW | Operating | 1903 |
| GEN7 | Conventional Hydroelectric | Water | 0.6 MW | Operating | 1940 |
| GN11 | Conventional Hydroelectric | Water | 0.6 MW | Operating | 1940 |
| GN16 | Conventional Hydroelectric | Water | 0.5 MW | Operating | 1940 |
| GN17 | Conventional Hydroelectric | Water | 0.5 MW | Operating | 1940 |
| GN18 | Conventional Hydroelectric | Water | 0.4 MW | Retired | 1987 |
| GN19 | Conventional Hydroelectric | Water | 0.4 MW | Retired | 1987 |
| GN20 | Conventional Hydroelectric | Water | 0.4 MW | Retired | 1987 |
| GN12 | Conventional Hydroelectric | Water | 0.2 MW | Operating | 1940 |
| GN13 | Conventional Hydroelectric | Water | 0.2 MW | Operating | 1940 |
| GN14 | Conventional Hydroelectric | Water | 0.2 MW | Operating | 1940 |
| GN15 | Conventional Hydroelectric | Water | 0.2 MW | Operating | 1940 |
| NERC Region | NPCC |
|---|---|
| Balancing Authority | Iso New England Inc. |
Hydroelectric plants spin turbines using falling or flowing water — typically from a dam-impounded reservoir. They are dispatchable, long-lived, and emission-free at the point of generation, though large reservoirs can disrupt rivers and ecosystems and methane can be released from flooded vegetation.