Stony Brook Cogen Plant
Natural gas power plant in Suffolk County, New York. 47 MW of nameplate capacity across 1 generator, operated by Nissequoque Cogen Partners.
Also known as EIA plant 54149
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 47 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- April 1995First generator online
- Operator
- Nissequoque Cogen PartnersEIA operator ID 13587
- Grid
- NYISOBalancing authority NYIS
- Price nodes
- 1 NYISO nodeResource nodes with prices
- Location
- Suffolk County, NY40.9168, −73.1291
- EIA plant ID
- 54149EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Stony Brook Cogen Plant produces
Free · EIA-923Net generation, 2025
285 GWh
284,605 MWh, final
Capacity factor, 2025
69.1%
2024: 74.9%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
277.9–309.3
GWh a year. Low 2015, high 2024
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 246,609 | Not reported | 12 of 12 |
| 2002 | 354,762 | Not reported | 12 of 12 |
| 2003 | 342,416 | Not reported | 12 of 12 |
| 2004 | 322,586 | Not reported | 12 of 12 |
| 2005 | 293,730 | Not reported | 12 of 12 |
| 2006 | 291,926 | Not reported | 12 of 12 |
| 2007 | 253,619 | Not reported | 12 of 12 |
| 2008 | 269,277 | Not reported | 12 of 12 |
| 2009 | 251,868 | Not reported | 12 of 12 |
| 2010 | 296,256 | 72.0% | 12 of 12 |
| 2011 | 275,170 | 66.8% | 12 of 12 |
| 2012 | 309,900 | 75.1% | 12 of 12 |
| 2013 | 313,139 | 76.1% | 12 of 12 |
| 2014 | 283,328 | 68.8% | 12 of 12 |
| 2015 | 277,884 | 67.5% | 12 of 12 |
| 2016 | 285,095 | 69.1% | 12 of 12 |
| 2017 | 299,977 | 72.9% | 12 of 12 |
| 2018 | 298,483 | 72.5% | 12 of 12 |
| 2019 | 288,649 | 70.1% | 12 of 12 |
| 2020 | 295,344 | 71.5% | 12 of 12 |
| 2021 | 280,817 | 68.2% | 12 of 12 |
| 2022 | 281,817 | 68.4% | 12 of 12 |
| 2023 | 288,544 | 70.1% | 12 of 12 |
| 2024 | 309,308 | 74.9% | 12 of 12 |
| 2025 | 284,605 | 69.1% | 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 · NYISOEmissions
Free · EPA CAMPDCO₂, 2025
180,299
US short tons. 2024: 198,367
SO₂, 2025
1
US short tons
NOx, 2025
127
US short tons
CO₂ per MWh, calculated
0.63 t
About 1,267 lb per MWh
1 of 1 EPA units reported CO₂ in 2025 (1), matched to EIA plant 54149 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 |
|---|---|---|---|
| GEN1 | Natural Gas Fired Combustion Turbine | 47.0 | April 1995 |
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 Nissequoque Cogen Partners 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 Stony Brook Cogen Plant
How much power does Stony Brook Cogen Plant produce?
Stony Brook Cogen Plant reported 284,605 MWh (285 GWh) of net generation in 2025, a 69.1% capacity factor on 47 MW of nameplate capacity.
Where is Stony Brook Cogen Plant?
Stony Brook Cogen Plant is in Suffolk County, New York, at 40.9168, −73.1291. It is in the New York Independent System Operator balancing area (NYIS).
Who operates Stony Brook Cogen Plant?
EIA-860M for August 2026 lists Nissequoque Cogen Partners as the operator (EIA operator ID 13587). The operator is not always the owner.
When did Stony Brook Cogen Plant start operating?
Its first generator began operating in April 1995, according to EIA-860M.
Does InfraMap have power prices for Stony Brook Cogen Plant?
Yes. InfraMap has NYISO day-ahead and real-time prices at 1 price node linked to Stony Brook Cogen Plant, 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
- NYISO 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