Rocky River (CT)
Hydro power plant · Litchfield County, Connecticut
Details
- Primary fuel
- Hydro
- Technology
- Hydroelectric Pumped Storage
- Operator
- FirstLight Power Resources Services LLC
- County
- Litchfield County
- Generating units
- 3
- Share of state capacity
- 0.28%
- Rank among hydro plants in Connecticut
- #2 of 14
- EIA plant code
- 539
Generating units
| Unit | Technology | Nameplate | Summer | Online | Status |
|---|---|---|---|---|---|
| 3 | Hydroelectric Pumped Storage | 24 MW | 25 MW | 1928 | Operating |
| 1 | Hydroelectric Pumped Storage | 3.5 MW | 2.0 MW | 1929 | Operating |
| 2 | Hydroelectric Pumped Storage | 3.5 MW | 2.0 MW | 1928 | 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 Connecticut
| DWW Solar ll | Solar | 37 MW |
| Kimberly Clark-Unit 1,2,3 | Natural gas | 36 MW |
| Stevenson | Hydro | 31 MW |
| Pratt & Whitney | Natural gas | 26 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 31 MW solar plant and a 31 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 Connecticut power plants · What Connecticut actually generates