💧 Hydroelectric Power Plants in Massachusetts
Massachusetts operates 33 hydroelectric power plants totaling 2,104 MW of nameplate capacity. Annual generation: 1.2M MWh.
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.
Plants33operating
Capacity2,103 MWnameplate
Generation1.2M MWhannual
All Massachusetts hydroelectric plants
| Plant | City | County | Capacity | Operator |
|---|---|---|---|---|
| Northfield Mountain | Northfield | Franklin County | 1,168 MW | Firstlight Power Resources, Inc. - Ma |
| Bear Swamp | Florida | Berkshire County | 666 MW | Bear Swamp Power Company Llc |
| Cabot | Montague | Franklin County | 62 MW | Firstlight Power Resources, Inc. - Ma |
| Hadley Falls | Holyoke | Hampden County | 33 MW | City Of Holyoke Gas And Electric Dept. |
| Cobble Mountain | Granville | Hampden County | 33 MW | City Of Holyoke Gas And Electric Dept. |
| Boott Hydropower | Lowell | Middlesex County | 23 MW | Boott Hydro, Llc - Hybrid |
| Deerfield 5 | Florida | Berkshire County | 18 MW | Great River Hydro, Llc |
| Lawrence Hydroelectric Associates | Lawrence | Essex County | 15 MW | Central Rivers Power Us, Llc |
| Fife Brook | Florida | Berkshire County | 11 MW | Bear Swamp Power Company Llc |
| Sherman | Rowe | Franklin County | 7 MW | Great River Hydro, Llc |
| Riverside Holyoke | Holyoke | Hampden County | 7 MW | City Of Holyoke Gas And Electric Dept. |
| Turners Falls | Montague | Franklin County | 6 MW | Firstlight Power Resources, Inc. - Ma |
| Deerfield 2 | Conway | Franklin County | 5 MW | Great River Hydro, Llc |
| Deerfield 3 | Buckland | Franklin County | 5 MW | Great River Hydro, Llc |
| Deerfield 4 | Buckland | Franklin County | 5 MW | Great River Hydro, Llc |
| Indian Orchard | Indian Orchard | Hampden County | 4 MW | Central Rivers Power Ma, Llc |
| Redbridge | Wilbraham | Hampden County | 4 MW | Central Rivers Power Ma, Llc |
| Gardners Falls | Buckland | Franklin County | 4 MW | Central Rivers Power Ma, Llc |
| Oakdale Power Station | West Boylston | Worcester County | 4 MW | Massachusetts Water Res Auth |
| Putts Bridge | Ludlow | Hampden County | 3 MW | Central Rivers Power Ma, Llc |
| Cosgrove Intake And Power Station | Clinton | Worcester County | 3 MW | Massachusetts Water Res Auth |
| Boatlock | Holyoke | Hampden County | 3 MW | City Of Holyoke Gas And Electric Dept. |
| International Paper Woronoco Mill | Woronoco | Hampden County | 3 MW | Eagle Creek Renewable Energy, Llc |
| Cabot Holyoke | Holyoke | Hampden County | 3 MW | City Of Holyoke Gas And Electric Dept. |
| Chicopee Hydroelectric Station | Chicopee | Hampden County | 2 MW | City Of Chicopee - (Ma) |
| Pepperell Hydro Power Plant | Pepperell | Middlesex County | 2 MW | Eagle Creek Renewable Energy, Llc |
| Chemical | Holyoke | Hampden County | 2 MW | City Of Holyoke Gas And Electric Dept. |
| Texon Hydroelectric Project | Russell | Hampden County | 2 MW | Hitchcock Hydro, Llc |
| Indian River Hydro | Russell | Hampden County | 1 MW | Eagle Creek Renewable Energy, Llc |
| Dwight | Chicopee | Hampden County | 1 MW | Central Rivers Power Ma, Llc |
| Collins Facility | Wilbraham | Hampden County | 1 MW | Relevate Power Management Llc |
| Winsor Dam Power Station | Ware | Hampshire County | — | Massachusetts Water Res Auth |
| Harris Energy Realty | Holyoke | Hampden County | — | City Of Holyoke Gas And Electric Dept. |