552nd largest plant in New York · 8379th nationally
Johnsonville Dam is a hydroelectric power plant in New York with a nameplate capacity of 4.0 MW. It generates roughly 13.6k MWh per year — enough to power about 1,299 average U.S. homes.
Its capacity factor of 39% reflects intermittent or peaking operation.
| Plant Name | Johnsonville Dam |
|---|---|
| Operator | Erie Boulevard Hydropower Lp |
| City | Johnsonville |
| County | Rensselaer County |
| State | New York |
| ZIP | 12094 |
| Coordinates | 42.92037, -73.50889 |
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 | 2.0 MW | Operating | 1909 |
| 2 | Conventional Hydroelectric | Water | 2.0 MW | Operating | 1909 |
| 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.