Algonquin Windsor Locks
Hartford County, Connecticut · EIA plant ID 10567 · Operator: Algonquin Windsor Locks LLC
Nameplate71MWSummer 64 MW
Generators3in service
Net generation143GWh12 mo to Aug 2026
Capacity factor26%gas/coal/oil units, summer MW
Heat rate5,673Btu/kWhfossil units, electric fuel, HHV
First online1990Runs as intermediate
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), gas/coal/oil 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.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2001 | 366.4 | — | — |
| 2002 | 388.9 | — | — |
| 2003 | 390.3 | 87.4% | 8,158 |
| 2004 | 378.8 | 84.5% | 7,008 |
| 2005 | 392.6 | 87.9% | 7,008 |
| 2006 | 367.4 | 82.2% | 7,008 |
| 2007 | 385.8 | 86.4% | 5,094 |
| 2008 | 384.2 | 85.8% | 7,106 |
| 2009 | 376.7 | 84.3% | 7,113 |
| 2010 | 300.2 | 67.2% | 7,161 |
| 2011 | 352.6 | 78.9% | 7,186 |
| 2012 | 196.1 | 38.8% | 7,075 |
| 2013 | 114.2 | 20.4% | 7,048 |
| 2014 | 119.3 | 21.3% | 7,008 |
| 2015 | 112 | 20.0% | 7,008 |
| 2016 | 140.4 | 25.0% | 5,673 |
| 2017 | 129.1 | 23.0% | 5,673 |
| 2018 | 162.1 | 28.9% | 5,673 |
| 2019 | 124.1 | 22.1% | 5,673 |
| 2020 | 128.1 | 22.8% | 5,673 |
| 2021 | 134.7 | 24.0% | 5,673 |
| 2022 | 134.1 | 23.9% | 5,673 |
| 2023 | 115.8 | 20.7% | 6,030 |
| 2024 | 130.3 | 23.2% | 5,673 |
| 2025 | 138 | 24.6% | 5,673 |
Fuel capability
Gas-fired turbines (CT/GT/CA/CS) that can also burn liquid fuel. EIA-860 Schedule 3 for capability, EIA-923 for actual burn.
StatusLikely still dual fuel
Liquid fuel burned · 36 mo127,145 MMBtu
Last month with liquid burnFeb 2026
Switch while operatingYes
Net summer MW on gas35
Net summer MW on oil35
Time gas → oilup to 1 h (EIA 1H)
Time oil → gasup to 1 h (EIA 1H)
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 |
|---|---|---|---|---|---|---|---|---|
| GTG | Natural Gas Fired Combined Cycle | CT | 40 | 35 | Jan 1990 | Operating | — | coming soon |
| GTG2 | Natural Gas Fired Combined Cycle | CT | 15 | 13 | Jul 2012 | Operating | — | coming soon |
| STG | Natural Gas Fired Combined Cycle | CA | 16 | 16 | Jan 1990 | Operating | — | coming soon |
Owner / operator
Operator: Algonquin Windsor Locks LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Algonquin Windsor Locks LLC | 100.0% | 71 MW |
Nearby plants
Within 80 km.
| Amazon BDL4 | 4 MW | 3.4 km |
| CT Airport Authority Solar One | — | 4 km |
| Bradley Energy Center | 6 MW | 4.8 km |
| Windsor Locks | — | 5.1 km |
| Rainbow (CT) | 8 MW | 5.7 km |
| Raffia Road Solar Project | 4 MW | 7 km |