6th largest plant in Massachusetts · 543rd nationally
Bear Swamp is a hydroelectric power plant in Massachusetts with a nameplate capacity of 666 MW.
| Plant Name | Bear Swamp |
|---|---|
| Operator | Bear Swamp Power Company Llc |
| City | Florida |
| County | Berkshire County |
| State | Massachusetts |
| ZIP | 01247 |
| Coordinates | 42.68390, -72.95990 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| GEN1 | Hydroelectric Pumped Storage | Water | 333 MW | Operating | 1974 |
| GEN2 | Hydroelectric Pumped Storage | Water | 333 MW | Operating | 1974 |
| Owner | Location | Share |
|---|---|---|
| Bear Swamp Power Company Llc | Marlborough, MA | 5000.0% |
| Emera Inc | Nova Scotia, CN | 5000.0% |
Ownership reported to EIA Form 860. Percentages reflect reported generator-level ownership share, averaged when a plant has multiple generators.
| 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.