Sweeny Cogen Facility
Brazoria County, Texas · EIA plant ID 55015 · Operator: Sweeny Cogeneration LP
Nameplate572MWSummer 436 MW
Generators4in service
Net generation2,880GWh12 mo to Aug 2026
Capacity factor75%gas/coal/oil units, summer MW
Heat rate5,254Btu/kWhfossil units, electric fuel, HHV
First online1997Runs as baseload
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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 | 3,608.7 | 85.5% | 9,342 |
| 2002 | 3,233.3 | 76.9% | 8,900 |
| 2003 | 2,656.7 | 63.2% | 5,467 |
| 2004 | 3,287.2 | 78.0% | 5,047 |
| 2005 | 3,412.7 | 81.2% | 5,047 |
| 2006 | 3,333.4 | 79.3% | 5,047 |
| 2007 | 3,268 | 85.6% | 5,047 |
| 2008 | 3,120.2 | 81.5% | 5,052 |
| 2009 | 3,227.1 | 84.5% | 5,061 |
| 2010 | 2,980.5 | 78.0% | 5,058 |
| 2011 | 3,221.2 | 84.3% | 5,068 |
| 2012 | 3,233.3 | 84.4% | 5,068 |
| 2013 | 2,864.4 | 75.0% | 5,061 |
| 2014 | 2,968.7 | 77.7% | 5,030 |
| 2015 | 2,833.5 | 74.2% | 5,037 |
| 2016 | 3,043.5 | 79.5% | 4,855 |
| 2017 | 2,694.5 | 70.5% | 4,853 |
| 2018 | 2,838.6 | 74.3% | 4,851 |
| 2019 | 2,761.2 | 72.3% | 4,945 |
| 2020 | 3,135.5 | 81.9% | 4,825 |
| 2021 | 3,300.1 | 86.4% | 4,845 |
| 2022 | 2,919.5 | 76.4% | 4,865 |
| 2023 | 2,310.3 | 60.5% | 6,759 |
| 2024 | 2,946.4 | 76.9% | 4,972 |
| 2025 | 3,304.8 | 86.5% | 4,847 |
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 | 143 | 109 | Aug 1997 | Operating | — | coming soon |
| GEN2 | Natural Gas Fired Combustion Turbine | GT | 143 | 109 | Sep 1997 | Operating | — | coming soon |
| GEN3 | Natural Gas Fired Combustion Turbine | GT | 143 | 109 | Oct 1997 | Operating | — | coming soon |
| GEN4 | Natural Gas Fired Combustion Turbine | GT | 143 | 109 | Dec 2000 | Operating | — | coming soon |
Owner / operator
Operator: Sweeny Cogeneration LP. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Sweeny Cogeneration LP | 100.0% | 572 MW |
Nearby plants
Within 80 km.
| Desna | 200 MW | 1.4 km |
| Sweeny | 10 MW | 5.9 km |
| Byrd Ranch Storage | 50 MW | 6 km |
| Bell Creek BESS LLC | — | 10.4 km |
| Second Division Solar | 100 MW | 10.9 km |
| Brazoria County Solar Project (Danciger) | 200 MW | 11.8 km |