Waterbury Generation
New Haven County, Connecticut · EIA plant ID 56629 · Operator: Engie North America
Nameplate96MWSummer 96 MW
Generators1in service
Net generation55GWh12 mo to Dec 2025
Capacity factor7%gas/coal/oil units, summer MW
Heat rate9,761Btu/kWhfossil units, electric fuel, HHV
First online2009Runs as peaking
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) |
|---|---|---|---|
| 2009 | 34.2 | 7.0% | 7,671 |
| 2010 | 84.7 | 10.2% | 8,933 |
| 2011 | 65.1 | 7.8% | 8,688 |
| 2012 | 41.7 | 5.0% | 9,434 |
| 2013 | 20.7 | 2.5% | 9,640 |
| 2014 | 24.8 | 3.0% | 8,804 |
| 2015 | 38.3 | 4.6% | 9,036 |
| 2016 | 40.2 | 4.8% | 8,796 |
| 2017 | 33.3 | 4.0% | 9,162 |
| 2018 | 18.2 | 2.2% | 9,314 |
| 2019 | 11.4 | 1.4% | 9,634 |
| 2020 | 18.5 | 2.2% | 10,708 |
| 2021 | 7.1 | 0.8% | 10,653 |
| 2022 | 43.1 | 5.1% | 10,129 |
| 2023 | 40.1 | 4.8% | 9,814 |
| 2024 | 43.8 | 5.2% | 9,689 |
| 2025 | 55 | 6.5% | 9,761 |
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 mo6,892 MMBtu
Last month with liquid burnDec 2025
Switch while operatingYes
Net summer MW on gas96
Net summer MW on oil90
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 |
|---|---|---|---|---|---|---|---|---|
| 10 | Natural Gas Fired Combustion Turbine | GT | 96 | 96 | Jun 2009 | Operating | — | coming soon |
Owner / operator
Operator: Engie North America. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Waterbury Generation LLC | 100.0% | 96 MW |
Nearby plants
Within 80 km.
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| Watertown Solar One, LLC | 2 MW | 12.2 km |
| CTGB Manson Youth | 2 MW | 12.3 km |
| CTGB Maloney and Webster | 2 MW | 12.3 km |
| Covanta Bristol Energy | 16 MW | 15.7 km |