Rocky River (CT)
Litchfield County, Connecticut · EIA plant ID 539 · Operator: FirstLight Power Resources Services LLC
Nameplate31MWSummer 29 MW
Generators3in service
Net generation-3GWh12 mo to Aug 2026
Capacity factor—not meaningful for storage
Heat rate—thermal plants only
First online1928
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), primary-fuel units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 0 | 0.0% | — |
| 2002 | 18 | 12.7% | — |
| 2003 | 14.4 | 6.5% | — |
| 2004 | 14.7 | 3.1% | — |
| 2005 | 13.2 | 6.7% | — |
| 2006 | 19.3 | 8.7% | — |
| 2007 | -2.4 | — | — |
| 2008 | 6.8 | — | — |
| 2009 | 5.4 | — | — |
| 2010 | 9.5 | — | — |
| 2011 | 5.6 | — | — |
| 2012 | 2.7 | — | — |
| 2013 | -1.1 | — | — |
| 2014 | 6.8 | — | — |
| 2015 | -3.7 | — | — |
| 2016 | 5.6 | — | — |
| 2017 | 1.8 | — | — |
| 2018 | 3.5 | — | — |
| 2019 | 2.2 | — | — |
| 2020 | 1.3 | — | — |
| 2021 | 0.4 | — | — |
| 2022 | 1.3 | — | — |
| 2023 | 4.5 | — | — |
| 2024 | 4.5 | — | — |
| 2025 | -2.4 | — | — |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 1 | Hydroelectric Pumped Storage | PS | 3.5 | 2 | Jan 1929 | Operating | — | coming soon |
| 2 | Hydroelectric Pumped Storage | PS | 3.5 | 2 | Jan 1928 | Operating | — | coming soon |
| 3 | Hydroelectric Pumped Storage | PS | 24 | 25.4 | Jan 1928 | Operating | — | coming soon |
Owner / operator
Operator: FirstLight Power Resources Services LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| FirstLight Hydro Generating Company | 100.0% | 31 MW |
Nearby plants
Within 80 km.
| Kimberly Clark-Unit 1,2,3 | 36 MW | 3.2 km |
| New Milford Gas Recovery | 2 MW | 4 km |
| Bulls Bridge | 7 MW | 9.7 km |
| Watchtower Educational Center | 2 MW | 14.9 km |
| Cricket Valley Energy | 1,313 MW | 16 km |
| Dover CSG | 2 MW | 16.1 km |