Quinebaug Lower Project
Windham County, Connecticut · EIA plant ID 55860 · Operator: Quinebaug Associates LLC
Nameplate3MWSummer 2 MW
Generators4in service
Net generation5GWh12 mo to Dec 2025
Capacity factor26%hydro units, summer MW
Heat rate—thermal plants only
First online1990
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), hydro 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) |
|---|---|---|---|
| 2002 | 0 | — | — |
| 2003 | 7.7 | 42.1% | — |
| 2005 | 8.6 | 47.0% | — |
| 2006 | 9.1 | 43.4% | — |
| 2007 | 5.9 | 28.3% | — |
| 2008 | 8.9 | 42.3% | — |
| 2009 | 8.8 | 42.0% | — |
| 2010 | 7.6 | 36.0% | — |
| 2011 | 11.1 | 52.8% | — |
| 2012 | 5.5 | 26.1% | — |
| 2013 | 6.5 | 31.1% | — |
| 2014 | 6.7 | 32.0% | — |
| 2015 | 4.9 | 23.1% | — |
| 2016 | 5 | 23.7% | — |
| 2017 | 7.4 | 35.3% | — |
| 2018 | 9.5 | 45.1% | — |
| 2019 | 8.6 | 41.0% | — |
| 2020 | 7 | 33.4% | — |
| 2021 | 10.3 | 49.2% | — |
| 2022 | 4.8 | 22.9% | — |
| 2023 | 10.1 | 47.8% | — |
| 2024 | 6.4 | 30.4% | — |
| 2025 | 5.4 | 25.6% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| 5-M | Conventional Hydroelectric | HY | 0.3 | 0.3 | Aug 1990 | Operating | — | coming soon |
| MF | Conventional Hydroelectric | HY | 0.1 | 0.1 | Apr 1990 | Operating | — | coming soon |
| U2 | Conventional Hydroelectric | HY | 0.8 | 0.8 | Aug 1990 | Operating | — | coming soon |
| UI | Conventional Hydroelectric | HY | 1.3 | 1.2 | Aug 1990 | Operating | — | coming soon |
Owner / operator
Operator: Quinebaug Associates LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Quinebaug Associates LLC | 100.0% | 3 MW |
Nearby plants
Within 80 km.
| Woods Hill Solar | 20 MW | 4.6 km |
| Quinebaug Solar | 49 MW | 6.6 km |
| Frito Lay Incorporated | 5 MW | 7.1 km |
| Lake Road Generating Plant | 840 MW | 8.2 km |
| CED Foster | 2 MW | 8.3 km |
| KCE CT 1, LLC | — | 9.4 km |