SWEENY COGEN FACILITY

Operating

Natural Gas power plant

Capacity
572 MW
Primary fuel
Natural Gas
County
Brazoria County
Operator
SWEENY COGENERATION LP
Status
Operating
Commissioned
1997
EIA plant ID
55015
Generators
4
Technology
Natural Gas Fired Combustion Turbine
Net generation (2024)
2,946 GWh
Capacity factor (2024, EIA nameplate)
59%
Data vintage
EIA-860 2024 final; EIA-923 2022-2024 final
Coordinates
29.0727, -95.7452

See it on the map

SWEENY COGEN FACILITY, a 572 MW Natural Gas power plant in Brazoria County, Texas. Operated by SWEENY COGENERATION LP, commissioned 1997.

How SWEENY COGEN FACILITY compares

With 572 MW of capacity, SWEENY COGEN FACILITY ranks 66th among the 307 operating power plants Bywatts maps in Texas and 51st of the 134 operating Natural Gas plants in the state. It accounts for about 0.9% of Texas's operating Natural Gas capacity and 0.5% of all operating capacity in the state. Nationally it is the 280th-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 1997, it is older than 58% of the 303 operating Texas plants with a recorded commissioning year. It shares Brazoria County with 7 other operating plants, including DOW CHEMICAL TEXAS OPERATION and OYSTER CREEK UNIT VIII.

EIA-860 lists 4 generators at the site with 572 MW of nameplate capacity, all natural gas fired combustion turbine technology. Net generation was 2,946 GWh in 2024 (a 59% capacity factor), up 1% from 2022. Its generators came online between 1997 and 2000.

Grid neighborhood

The closest transmission line found within 10 miles is a 138 kV line owned by TEXAS-NEW MEXICO POWER CO., under 0.1 miles away. Another 5 operating power plants totaling 1,713 MW sit within 25 miles; the largest is DOW CHEMICAL TEXAS OPERATION (678 MW, Natural Gas). Within 50 miles is one mapped data center, Databank Houston Galleria (HOU5) in Houston, about 48.8 miles away.

Computed by Bywatts from HIFLD power plant and transmission line records, EIA-860/923 survey data and PeeringDB data center locations; distances are straight-line. Sources and methodology

Weather peril exposure

SWEENY COGEN FACILITY is a 572 MW natural gas power plant in Brazoria County, TX, operated by SWEENY COGENERATION LP, commissioned in 1997. Brazoria County carries elevated modeled catastrophe exposure in the FEMA National Risk Index, scoring 2.8 of 5 at the 46th national percentile. Hurricane is the leading peril, rated Relatively High by FEMA at the 91st percentile.

The Bywatts loss layer is calibrated to solar PV hardware, so it is not applied to a natural gas plant. The ratings below are the FEMA National Risk Index county hazard ratings for this location.

2.8 of 5Modeled catastrophe exposure
ElevatedExposure band
HurricaneLeading peril
Relatively ModerateFEMA county risk rating

Brazoria County hazard ratings

PerilFEMA ratingNational percentilePeril scoreEvents per year
HurricaneRelatively High91st4.6 of 50.22
Riverine floodingRelatively High74th4.0 of 51.9
WildfireRelatively Low68th3.7 of 5<0.01
Heat waveRelatively Moderate52nd3.1 of 514.9
Coastal floodingRelatively Moderate45th2.8 of 53.7
TornadoRelatively High36th2.5 of 51.1
LightningRelatively High28th2.1 of 570.0
Strong windRelatively Moderate13th1.5 of 51.0
EarthquakeVery Low13th1.5 of 5<0.01
HailRelatively Low11th1.4 of 51.6
Ice stormRelatively High7th1.3 of 50.69
Winter weatherVery Low7th1.3 of 50.89

Model hail, wind and flood exposure for Brazoria County in the weather risk calculator

Ratings are the FEMA National Risk Index county hazard ratings; the peril score is a Bywatts transform of the FEMA national percentile. Full data sources and the solar vulnerability methodology are in the weather risk calculator.

Modeled estimate for screening and negotiation. Built from FEMA National Risk Index county hazard data and a solar vulnerability layer documented above. Not a quote, a binder, or actuarial advice, and not a substitute for a carrier's own model. Hazard data: FEMA National Risk Index December 2025, synced 2026-07-24. Resolution is county level, not site level.