40th largest plant in New Hampshire · 9135th nationally
Errol Hydroelectric Project is a hydroelectric power plant in New Hampshire with a nameplate capacity of 3.0 MW. It generates roughly 16.2k MWh per year — enough to power about 1,546 average U.S. homes.
Its capacity factor of 62% puts it in the middle range — running steadily but not full-time.
| Plant Name | Errol Hydroelectric Project |
|---|---|
| Operator | Errol Hydroelectric Co Llc |
| City | Errol |
| County | Coos County |
| State | New Hampshire |
| ZIP | 03579 |
| Coordinates | 44.78665, -71.12433 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | Water | 3.0 MW | Operating | 1986 |
| 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.