RIO NOGALES POWER PROJECT

Operating

Natural Gas power plant

Capacity
898 MW
Primary fuel
Natural Gas
County
Guadalupe County
Operator
CITY OF SAN ANTONIO - (TX)
Status
Operating
Commissioned
2002
EIA plant ID
55137
Generators
4
Technology
Natural Gas Fired Combined Cycle
Net generation (2024)
5,029 GWh
Capacity factor (2024, EIA nameplate)
61%
Data vintage
EIA-860 2024 final; EIA-923 2022-2024 final
Coordinates
29.5931, -97.9735

See it on the map

RIO NOGALES POWER PROJECT, an 898 MW Natural Gas power plant in Guadalupe County, Texas. Operated by CITY OF SAN ANTONIO - (TX), commissioned 2002.

How RIO NOGALES POWER PROJECT compares

With 898 MW of capacity, RIO NOGALES POWER PROJECT ranks 35th among the 307 operating power plants Bywatts maps in Texas and 24th of the 134 operating Natural Gas plants in the state. It accounts for about 1.3% of Texas's operating Natural Gas capacity and 0.9% of all operating capacity in the state. Nationally it is the 125th-largest of the 1,185 operating Natural Gas plants in the database. Commissioned in 2002, it is newer than 52% of the 303 operating Texas plants with a recorded commissioning year. Its operator, CITY OF SAN ANTONIO - (TX), runs 6 operating plants in Texas totaling 5,341 MW. It shares Guadalupe County with 5 other operating plants, including GUADALUPE GENERATING STATION and DUNLAP TP 1.

EIA-860 lists 4 generators at the site with 940 MW of nameplate capacity, all natural gas fired combined cycle technology. Net generation was 5,029 GWh in 2024 (a 61% capacity factor), up 11% from 2022.

Grid neighborhood

The closest transmission line found within 10 miles is a 345 kV line owned by BLUEBONNET ELECTRIC COOP, INC, about 0.1 miles away. Another 9 operating power plants totaling 2,100 MW sit within 25 miles; the largest is GUADALUPE GENERATING STATION (1,088 MW, Natural Gas). Within 50 miles are 2 mapped data centers; the nearest is CyrusOne San Antonio in San Antonio, about 43.8 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

RIO NOGALES POWER PROJECT is an 898 MW natural gas power plant in Guadalupe County, TX, operated by CITY OF SAN ANTONIO - (TX), commissioned in 2002. Guadalupe County carries high modeled catastrophe exposure in the FEMA National Risk Index, scoring 3.8 of 5 at the 70th national percentile. Riverine flooding is the leading peril, rated Relatively High by FEMA at the 82nd 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.

3.8 of 5Modeled catastrophe exposure
HighExposure band
Riverine floodingLeading peril
Relatively ModerateFEMA county risk rating

Guadalupe County hazard ratings

PerilFEMA ratingNational percentilePeril scoreEvents per year
Riverine floodingRelatively High82nd4.3 of 52.9
HailRelatively Moderate76th4.0 of 53.0
Winter weatherRelatively Moderate56th3.2 of 52.6
HurricaneRelatively Low54th3.2 of 50.06
WildfireRelatively Low53rd3.1 of 5<0.01
TornadoRelatively High47th2.9 of 50.31
Heat waveRelatively Moderate46th2.8 of 510.6
Strong windRelatively Moderate44th2.8 of 51.2
LightningRelatively High24th2.0 of 548.5
Ice stormRelatively Low8th1.3 of 50.30
EarthquakeVery Low5th1.2 of 5<0.01

Perils not assessed in Guadalupe County

These perils carry no usable National Risk Index figure for this county, so they are excluded from the scoring rather than scored zero. A zero would claim the peril was assessed and found benign.

PerilWhy it is not scored
Coastal floodingFEMA rating is "Not Applicable" for this county

Model hail, wind and flood exposure for Guadalupe 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.