💧 Hydroelectric Power Plants in New Hampshire
New Hampshire operates 32 hydroelectric power plants totaling 530 MW of nameplate capacity. Annual generation: 1.6M 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.
Plants32operating
Capacity530 MWnameplate
Generation1.6M MWhannual
All New Hampshire hydroelectric plants
| Plant | City | County | Capacity | Operator |
|---|---|---|---|---|
| S C Moore | Littleton | Grafton County | 195 MW | Great River Hydro, Llc |
| Comerford | Monroe | Grafton County | 168 MW | Great River Hydro, Llc |
| Berlin Gorham | Berlin | Coos County | 44 MW | Great Lakes Hydro America Llc |
| Amoskeag | Manchester | Hillsborough County | 16 MW | Central Rivers Power Nh, Llc |
| Smith (Nh) | Berlin | Coos County | 15 MW | Central Rivers Power Nh, Llc |
| Garvins Falls | Bow | Merrimack County | 12 MW | Central Rivers Power Nh, Llc |
| Pontook Hydro Facility | Dummer | Coos County | 11 MW | Pontook Operating Lp |
| Ayers Island | Bristol | Grafton County | 8 MW | Central Rivers Power Nh, Llc |
| Eastman Falls | Franklin | Merrimack County | 6 MW | Central Rivers Power Nh, Llc |
| Dodge Falls Associates | Bath | Grafton County | 5 MW | Dodge Falls Associates Lp |
| Penacook Lower Falls | Boscawen | Merrimack County | 5 MW | Briar-Hydro Associates |
| Rolfe Canal Hydro | Penacook | Merrimack County | 4 MW | Briar-Hydro Associates |
| Gregg Falls | Goffstown | Hillsborough County | 4 MW | Eagle Creek Renewable Energy, Llc |
| Penacook Upper Falls Hydro | Penacook | Merrimack County | 3 MW | Briar-Hydro Associates |
| Jackman | Hillsborough | Hillsborough County | 3 MW | Central Rivers Power Nh, Llc |
| Mine Falls Generating Station | Nashua | Hillsborough County | 3 MW | City Of Nashua, Nh |
| Errol Hydroelectric Project | Errol | Coos County | 3 MW | Errol Hydroelectric Co Llc |
| Pembroke Hydro | Suncook | Merrimack County | 3 MW | Eagle Creek Renewable Energy, Llc |
| Clement Dam Hydro Llc | Tilton | Belknap County | 2 MW | Eagle Creek Renewable Energy, Llc |
| Gorham | Gorham | Coos County | 2 MW | Central Rivers Power Nh, Llc |
| Stevens Mills Dam | Franklin | Merrimack County | 2 MW | Eagle Creek Renewable Energy, Llc |
| China Mill Hydro | Allenstown | Merrimack County | 2 MW | New Hampshire Hydro Associates |
| Hooksett | Hooksett | Merrimack County | 2 MW | Central Rivers Power Nh, Llc |
| Mascoma Hydro | W. Lebanon | Grafton County | 2 MW | Green Mountain Power Corp |
| Milton Hydro | Milton | Strafford County | 1 MW | Sfr Hydro Cor |
| Newfound Hydroelectric | Bristol | Grafton County | 1 MW | Eagle Creek Renewable Energy, Llc |
| Rollinsford | Rollinsford | Strafford County | 1 MW | Green Mountain Power Corp |
| Somersworth Lower Great Dam | Somersworth | Strafford County | 1 MW | Green Mountain Power Corp |
| Hillsborough Hosiery | Hillsboro | Hillsborough County | 1 MW | Silverstreet Hydro |
| Lower Village Water Power Project | Claremont | Sullivan County | 1 MW | Sugar River Power Llc |
| Lochmere Hydroelectric Plant | Tilton | Belknap County | 1 MW | Eagle Creek Renewable Energy, Llc |
| Ehc West Hopkinton | West Hopkinton | Merrimack County | 1 MW | Green Mountain Power Corp |