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940.2 MW Natural Gas operating in Guadalupe, TX — Electric Reliability Council of Texas, Inc.
940.2 MW
Nameplate Capacity
4
Generators
units
Natural Gas Fired Combined Cycle
Technology
2002
Operating Since
Coordinates
29.5931, -97.9732
County
Guadalupe, TX
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | City of San Antonio - (TX) | — | — |
| Owner(s) | City of San Antonio - (TX) | — | — |
| Status | Operating | — | — |
The Rio Nogales Power Project is a 940.2 MW natural gas-fired combined cycle power plant located in Guadalupe County, Texas. The plant began operating in 2002 and consists of four generators. It is owned and operated by the City of San Antonio. The plant is connected to the Electric Reliability Council of Texas (ERCOT) grid and falls within the TRE NERC region.
In the most recent year of reported data, the Rio Nogales Power Project generated 4,144,951 MWh of electricity, achieving a capacity factor of 50.4%. The plant ranks as the 26th largest in Texas out of 144 plants, and 186th nationally out of 945 plants.
Generated from EIA, GEM, and public data sources
ISO/RTO
ERCOT
Market
ISO/RTO Member
NERC Region
TRE — Texas Reliability Entity
Balancing Authority
249.4K MWh
Latest Month
4.1M MWh
Annual Generation
50.4%
Capacity Factor
CO₂ Intensity
844 lb/MWh
NOx
0.127 lb/MWh
SO₂
2013
$965/kW
Est. Construction Cost
Total estimated cost: $907.4M
Point of Interconnection
Nearest Substation
Rio Nogales Switchyard · 345 kV
Substation Distance
< 10 km
Operator
CPS Energy
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ERCOT
LMP Node
RIONOG_ST1
Pricing Hub
HB_SOUTH
Alt. Hub / Zone
LZ_SOUTH
Location Type
Resource Node
Node Source
EIA-860 direct report
Last updated 2026-03-14
View all articlesElectric Reliability Council of Texas, Inc. (ERCO)
Grid Voltage
345.0 kV
Regulatory Status
RE — Regulated
Entity Type
Municipal
Sector
Electric Utility
0.004 lb/MWh
CH₄
0.016 lb/MWh
N₂O
0.002 lb/MWh
Capacity Factor
53.1%
Annual Net Gen
4377 GWh
CO₂eq
845 lb/MWh
Subregion
ERCOT All