Longfalls Facility
Hydro power plant · Jefferson County, New York
Nameplate capacity
3.3 MW
Rank in New York
#733
of 1,152 plants
In service since
1991
October 1991
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Ampersand Long Falls Hydro, LLC
- County
- Jefferson County
- Generating units
- 1
- Share of state capacity
- 0.01%
- Rank among hydro plants in New York
- #101 of 165
- EIA plant code
- 54548
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 3.3 MW | 3.0 MW | 1991 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
Similarly sized plants in New York
| Great Valley Gernatt | Solar | 3.3 MW |
| Lenox Renewables | Solar | 3.3 MW |
| Oneida 2 CDG | Solar | 3.3 MW |
| USNY - Geddes | Solar | 3.3 MW |
About this data
From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 3.3 MW solar plant and a 3.3 MW nuclear plant have the same entry here and produce very different amounts of electricity.
“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All New York power plants · What New York actually generates