GenConn Middletown LLC
Oil power plant in Middlesex County, Connecticut. 242 MW of nameplate capacity across 4 generators, operated by GenConn Middletown LLC.
Also known as EIA plant 57068
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 242 MWNameplate
- Generators
- 4 operatingEIA-860M, August 2026
- Operating since
- June 2011First generator online
- Operator
- GenConn Middletown LLCEIA operator ID 56354
- Grid
- ISO-NEBalancing authority ISNE
- Price nodes
- 4 ISONE nodesResource nodes with prices
- Location
- Middlesex County, CT41.5544, −72.5767
- EIA plant ID
- 57068EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power GenConn Middletown produces
Free · EIA-923Net generation, 2025
6.48 GWh
6,480 MWh, final
Capacity factor, 2025
0.3%
2024: 0.3%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
−0.3–12.3
GWh a year. Low 2019, high 2015
| 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 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | 16,207 | Not reported | 7 of 12 |
| 2012 | 1,658 | Not reported | 12 of 12 |
| 2013 | 1,346 | 0.3% | 3 of 12 |
| 2014 | 12,465 | 0.9% | 8 of 12 |
| 2015 | 12,342 | 0.6% | 12 of 12 |
| 2016 | 5,173 | 0.5% | 6 of 12 |
| 2017 | 9,779 | 0.5% | 12 of 12 |
| 2018 | 3,162 | Not reported | 12 of 12 |
| 2019 | −255 | -0.0% | 12 of 12 |
| 2020 | 693 | 0.0% | 12 of 12 |
| 2021 | 5,124 | 0.2% | 12 of 12 |
| 2022 | 4,581 | 0.2% | 12 of 12 |
| 2023 | 3,507 | 0.2% | 12 of 12 |
| 2024 | 5,940 | 0.3% | 12 of 12 |
| 2025 | 6,480 | 0.3% | 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 CAMPDCO₂, 2025
5,155
US short tons. 2024: 4,276
SO₂, 2025
0
US short tons
NOx, 2025
0
US short tons
CO₂ per MWh, calculated
0.80 t
About 1,591 lb per MWh
4 of 4 EPA units reported CO₂ in 2025 (12, 13, 14, 15), matched to EIA plant 57068 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 |
|---|---|---|---|
| 12 | Petroleum Liquids | 60.5 | June 2011 |
| 13 | Petroleum Liquids | 60.5 | June 2011 |
| 14 | Petroleum Liquids | 60.5 | June 2011 |
| 15 | Petroleum Liquids | 60.5 | June 2011 |
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 GenConn Middletown 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 GenConn Middletown
How much power does GenConn Middletown LLC produce?
GenConn Middletown LLC reported 6,480 MWh (6.48 GWh) of net generation in 2025, a 0.3% capacity factor on 242 MW of nameplate capacity.
Where is GenConn Middletown LLC?
GenConn Middletown LLC is in Middlesex County, Connecticut, at 41.5544, −72.5767. It is in the ISO New England Inc. balancing area (ISNE).
Who operates GenConn Middletown LLC?
EIA-860M for August 2026 lists GenConn Middletown LLC as the operator (EIA operator ID 56354). The operator is not always the owner.
When did GenConn Middletown LLC start operating?
Its first generator began operating in June 2011, according to EIA-860M.
Does InfraMap have power prices for GenConn Middletown LLC?
Yes. InfraMap has ISONE day-ahead and real-time prices at 4 price nodes linked to GenConn Middletown LLC, 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
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page