173rd largest plant in New York · 4943rd nationally
Grahamsville is a hydroelectric power plant in New York with a nameplate capacity of 18.0 MW. It generates roughly 75.9k MWh per year — enough to power about 7,225 average U.S. homes.
Its capacity factor of 48% puts it in the middle range — running steadily but not full-time.
| Plant Name | Grahamsville |
|---|---|
| Operator | New York Power Authority |
| City | Grahamsville |
| County | Sullivan County |
| State | New York |
| ZIP | 12740 |
| Coordinates | 41.85920, -74.51060 |
This plant highlighted in navy-ringed pin; other generators within 25 miles shown as fuel-colored dots.
| ID | Technology | Fuel | Capacity | Status | Online |
|---|---|---|---|---|---|
| GRHM | Conventional Hydroelectric | Water | 18.0 MW | Operating | 1956 |
| Owner | Location | Share |
|---|---|---|
| City Of New York | New York, NY | 10000.0% |
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 | New York Independent System Operator |
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.