Quinebaug Lower Project
Hydro power plant in Windham County, Connecticut. 2.5 MW of nameplate capacity across 4 generators, operated by Quinebaug Associates LLC.
Also known as Quinebaug Hydroelectric Project · EIA plant 55860
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 2.5 MWNameplate
- Generators
- 4 operatingEIA-860M, August 2026
- Operating since
- April 1990First generator online
- Operator
- Quinebaug Associates LLCEIA operator ID 25771
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- 1 ISONE nodeResource nodes with prices
- Location
- Windham County, CT41.7987, −71.8868
- EIA plant ID
- 55860EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Quinebaug Lower Project produces
Free · EIA-923Net generation, 2025
5.38 GWh
5,382 MWh, final
Capacity factor, 2025
24.6%
2024: 29.1%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
4.8–10.3
GWh a year. Low 2022, high 2021
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | 0 | Not reported | 12 of 12 |
| 2003 | 7,744 | Not reported | 12 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | 8,642 | Not reported | 12 of 12 |
| 2006 | 9,132 | Not reported | 12 of 12 |
| 2007 | 5,950 | Not reported | 12 of 12 |
| 2008 | 8,911 | Not reported | 12 of 12 |
| 2009 | 8,837 | Not reported | 12 of 12 |
| 2010 | 7,568 | 34.6% | 12 of 12 |
| 2011 | 11,099 | 50.7% | 12 of 12 |
| 2012 | 5,500 | 25.0% | 12 of 12 |
| 2013 | 6,537 | 29.8% | 12 of 12 |
| 2014 | 6,739 | 30.8% | 12 of 12 |
| 2015 | 4,850 | 22.1% | 12 of 12 |
| 2016 | 5,000 | 22.8% | 12 of 12 |
| 2017 | 7,415 | 33.9% | 12 of 12 |
| 2018 | 9,490 | 43.3% | 12 of 12 |
| 2019 | 8,615 | 39.3% | 12 of 12 |
| 2020 | 7,036 | 32.0% | 12 of 12 |
| 2021 | 10,338 | 47.2% | 12 of 12 |
| 2022 | 4,823 | 22.0% | 12 of 12 |
| 2023 | 10,052 | 45.9% | 12 of 12 |
| 2024 | 6,400 | 29.1% | 12 of 12 |
| 2025 | 5,382 | 24.6% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · ISONEEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024. Plants without steam cooling, such as wind, solar and batteries, do not report cooling water.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 5-M | Conventional Hydroelectric | 0.3 | August 1990 |
| MF | Conventional Hydroelectric | 0.1 | April 1990 |
| U2 | Conventional Hydroelectric | 0.8 | August 1990 |
| UI | Conventional Hydroelectric | 1.3 | August 1990 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Quinebaug Associates LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
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Questions about Quinebaug Lower Project
How much power does Quinebaug Lower Project produce?
Quinebaug Lower Project reported 5,382 MWh (5.38 GWh) of net generation in 2025, a 24.6% capacity factor on 2.5 MW of nameplate capacity.
Where is Quinebaug Lower Project?
Quinebaug Lower Project is in Windham County, Connecticut, at 41.7987, −71.8868. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Quinebaug Lower Project?
EIA-860M for August 2026 lists Quinebaug Associates LLC as the operator (EIA operator ID 25771). The operator is not always the owner.
When did Quinebaug Lower Project start operating?
Its first generator began operating in April 1990, according to EIA-860M.
Does InfraMap have power prices for Quinebaug Lower Project?
Yes. InfraMap has ISONE day-ahead and real-time prices at 1 price node linked to Quinebaug Lower Project, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- ISONE day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page