Algonquin Windsor Locks
Natural gas power plant in Hartford County, Connecticut. 71 MW of nameplate capacity across 3 generators, operated by Ahlstrom Power Windsor Locks LLC.
Also known as Algonquin Windsor Locks Power Plant · EIA plant 10567
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 71 MWNameplate
- Generators
- 3 operatingEIA-860M, August 2026
- Operating since
- January 1990First generator online
- Operator
- Ahlstrom Power Windsor Locks LLCEIA operator ID 291
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- 2 ISONE nodesResource nodes with prices
- Location
- Hartford County, CT41.9227, −72.6255
- EIA plant ID
- 10567EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Algonquin Windsor Locks produces
Free · EIA-923Net generation, 2025
138 GWh
137,956 MWh, final
Capacity factor, 2025
22.2%
2024: 20.9%
January to July 2026
84.8 GWh
Provisional
Range, 2015 to 2025
112.0–162.1
GWh a year. Low 2015, high 2018
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 360,586 | Not reported | 12 of 12 |
| 2001 | 366,404 | Not reported | 12 of 12 |
| 2002 | 388,852 | Not reported | 12 of 12 |
| 2003 | 390,294 | Not reported | 12 of 12 |
| 2004 | 378,776 | Not reported | 12 of 12 |
| 2005 | 392,569 | Not reported | 12 of 12 |
| 2006 | 367,352 | Not reported | 12 of 12 |
| 2007 | 385,804 | Not reported | 12 of 12 |
| 2008 | 384,215 | Not reported | 12 of 12 |
| 2009 | 376,671 | Not reported | 12 of 12 |
| 2010 | 300,234 | 61.2% | 12 of 12 |
| 2011 | 352,649 | 71.9% | 12 of 12 |
| 2012 | 196,100 | Not reported | 12 of 12 |
| 2013 | 114,247 | Not reported | 12 of 12 |
| 2014 | 119,343 | 19.2% | 12 of 12 |
| 2015 | 112,014 | 18.0% | 12 of 12 |
| 2016 | 140,352 | 22.5% | 12 of 12 |
| 2017 | 129,081 | 20.8% | 12 of 12 |
| 2018 | 162,122 | 26.1% | 12 of 12 |
| 2019 | 124,110 | 20.0% | 12 of 12 |
| 2020 | 128,092 | 20.5% | 12 of 12 |
| 2021 | 134,739 | 21.7% | 12 of 12 |
| 2022 | 134,118 | 21.6% | 12 of 12 |
| 2023 | 115,819 | 18.6% | 12 of 12 |
| 2024 | 130,309 | 20.9% | 12 of 12 |
| 2025 | 137,956 | 22.2% | 12 of 12 |
| 2026 (provisional, partial year) | 84,761 | 23.5% | 7 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 CAMPDCO₂, 2025
14,931
US short tons. 2024: 8,513
SO₂, 2025
Not reported
US short tons
NOx, 2025
12
US short tons
CO₂ per MWh, calculated
0.11 t
About 216 lb per MWh
1 of 1 EPA units reported CO₂ in 2025 (GT1), matched to EIA plant 10567 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| GTG | Natural Gas Fired Combined Cycle | 40.0 | January 1990 |
| GTG2 | Natural Gas Fired Combined Cycle | 15.0 | July 2012 |
| STG | Natural Gas Fired Combined Cycle | 16.0 | January 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 Ahlstrom Power Windsor Locks LLC as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Questions about Algonquin Windsor Locks
How much power does Algonquin Windsor Locks produce?
Algonquin Windsor Locks reported 137,956 MWh (138 GWh) of net generation in 2025, a 22.2% capacity factor on 71 MW of nameplate capacity. From January to July 2026 it reported 84.8 GWh, which is provisional.
Where is Algonquin Windsor Locks?
Algonquin Windsor Locks is in Hartford County, Connecticut, at 41.9227, −72.6255. It is in the ISO New England Inc. balancing area (ISNE).
Who operates Algonquin Windsor Locks?
EIA-860M for August 2026 lists Ahlstrom Power Windsor Locks LLC as the operator (EIA operator ID 291). The operator is not always the owner.
When did Algonquin Windsor Locks start operating?
Its first generator began operating in January 1990, according to EIA-860M.
Does InfraMap have power prices for Algonquin Windsor Locks?
Yes. InfraMap has ISONE day-ahead and real-time prices at 2 price nodes linked to Algonquin Windsor Locks, 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)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- 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