Hollow Dam Power Partnership
Hydro power plant · St Lawrence County, New York
Nameplate capacity
1.0 MW
Rank in New York
#1132
of 1,152 plants
In service since
1987
December 1987
Details
- Primary fuel
- Hydro
- Technology
- Conventional Hydroelectric
- Operator
- Ampersand Hollow Dam Hydro LLC
- County
- St Lawrence County
- Generating units
- 2
- Share of state capacity
- 0.00%
- Rank among hydro plants in New York
- #160 of 165
- EIA plant code
- 10124
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| HY1 | Conventional Hydroelectric | 0.5 MW | 0.3 MW | 1987 | Out of service and NOT expected to return to service in next calendar year |
| HY2 | Conventional Hydroelectric | 0.5 MW | 0.3 MW | 1987 | Operating |
Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.
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| Goldman Sachs Carports Solar | Solar | 1.0 MW |
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| IRE Solar I, LLC | Solar | 1.0 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 1.0 MW solar plant and a 1.0 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