Stony Brook Cogen Plant
Suffolk County, New York · EIA plant ID 54149 · Operator: Nissequoque Cogen Partners
Nameplate47MWSummer 45 MW
Generators1in service
Net generation285GWh12 mo to Dec 2025
Capacity factor73%gas/coal/oil units, summer MW
Heat rate5,491Btu/kWhfossil units, electric fuel, HHV
First online1995Runs as baseload
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 | 246.6 | — | — |
| 2002 | 354.8 | — | — |
| 2003 | 342.4 | 87.8% | 5,466 |
| 2004 | 322.6 | 82.5% | 4,834 |
| 2005 | 293.7 | 75.3% | 4,834 |
| 2006 | 291.9 | 74.9% | 4,834 |
| 2007 | 253.6 | 65.1% | 11,931 |
| 2008 | 269.3 | 68.9% | 4,880 |
| 2009 | 251.9 | 64.6% | 4,946 |
| 2010 | 296.3 | 76.0% | 5,098 |
| 2011 | 275.2 | 70.6% | 4,929 |
| 2012 | 309.9 | 79.3% | 4,964 |
| 2013 | 313.1 | 80.3% | 4,951 |
| 2014 | 283.3 | 72.7% | 4,958 |
| 2015 | 277.9 | 71.3% | 4,955 |
| 2016 | 285.1 | 72.9% | 5,517 |
| 2017 | 300 | 77.0% | 5,472 |
| 2018 | 298.5 | 76.6% | 5,544 |
| 2019 | 288.6 | 74.1% | 5,533 |
| 2020 | 295.3 | 75.6% | 5,532 |
| 2021 | 280.8 | 72.0% | 5,529 |
| 2022 | 281.8 | 72.3% | 5,496 |
| 2023 | 288.5 | 74.0% | 5,511 |
| 2024 | 309.3 | 79.1% | 5,497 |
| 2025 | 284.6 | 73.0% | 5,491 |
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 mo9,692 MMBtu
Last month with liquid burnDec 2025
Switch while operatingYes
Net summer MW on gas42
Net summer MW on oil42
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 |
|---|---|---|---|---|---|---|---|---|
| GEN1 | Natural Gas Fired Combustion Turbine | GT | 47 | 44.5 | Apr 1995 | Operating | — | coming soon |
Owner / operator
Operator: Nissequoque Cogen Partners. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Nissequoque Cogen Partners | 100.0% | 47 MW |
Nearby plants
Within 80 km.
| Port Jefferson | 498 MW | 5.6 km |
| Kings Park Solar I | 2 MW | 11.5 km |
| Kings Park Solar II | 2 MW | 11.5 km |
| Saint Catherine of Siena Medical Center | 2 MW | 12.1 km |
| Blydenburgh Solar Project | 2 MW | 12.1 km |
| Holtsville | 567 MW | 12.3 km |