Southold
Suffolk County, New York · EIA plant ID 2520 · Operator: National Grid Generation LLC
Nameplate14MWSummer 10 MW
Generators1in service
Net generation0GWh12 mo to Dec 2025
Capacity factor1%gas/coal/oil units, summer MW
Heat rate23,284Btu/kWhfossil units, electric fuel, HHV
First online1964Runs as rarely runs
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 | 2.9 | 2.4% | 22,161 |
| 2002 | 4.9 | 4.0% | 20,094 |
| 2003 | 2.9 | 2.6% | 20,676 |
| 2004 | 1 | 1.1% | 20,351 |
| 2005 | 1 | 0.9% | 23,932 |
| 2006 | 0.7 | 0.7% | 25,641 |
| 2007 | 2.8 | 2.9% | 20,568 |
| 2008 | 0 | 0.0% | — |
| 2009 | 2 | 2.5% | 20,425 |
| 2010 | 1.8 | 1.7% | 19,811 |
| 2011 | 1.2 | 1.5% | 25,021 |
| 2012 | 0.5 | 0.8% | 26,139 |
| 2013 | 1.6 | 2.0% | 22,086 |
| 2014 | 0.2 | 0.1% | — |
| 2015 | 0.7 | 0.8% | 29,666 |
| 2016 | 0.7 | 0.8% | 23,743 |
| 2017 | 0.1 | 0.2% | — |
| 2018 | 1.8 | 2.1% | 23,217 |
| 2019 | 1.7 | 2.0% | 22,155 |
| 2020 | 2.4 | 2.7% | 22,425 |
| 2021 | 1.4 | 1.6% | 22,624 |
| 2022 | 0.8 | 0.9% | 22,936 |
| 2023 | 0.7 | 0.8% | 22,475 |
| 2024 | 0.7 | 0.8% | 22,286 |
| 2025 | 0.5 | 0.5% | 23,284 |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Petroleum Liquids | GT | 14 | 10 | Aug 1964 | Operating | — | coming soon |
Owner / operator
Operator: National Grid Generation LLC. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| National Grid Generation LLC | 100.0% | 14 MW |
Nearby plants
Within 80 km.
| Hawkeye Energy Greenport LLC | 54 MW | 0 km |
| Greenport | 10 MW | 0.1 km |
| Sterlington Greenworks LLC | 1 MW | 6.9 km |
| Kearsarge Southampton | 5 MW | 19.6 km |
| East Hampton | 27 MW | 21.2 km |
| East Hampton Energy Storage Center | 5 MW | 21.2 km |