Rio Nogales Power Project
Guadalupe County, Texas · EIA plant ID 55137 · Operator: City of San Antonio - (TX)
Nameplate1,108MWSummer 800 MW
Generators4in service
Net generation4,608GWh12 mo to Aug 2026
Capacity factor66%gas/coal/oil units, summer MW
Heat rate7,042Btu/kWhfossil units, electric fuel, HHV
First online2002Runs 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) |
|---|---|---|---|
| 2002 | 1,258.8 | — | — |
| 2003 | 1,227.4 | 19.9% | 7,815 |
| 2004 | 1,453.1 | 23.5% | 7,699 |
| 2005 | 3,160.6 | 51.2% | 7,203 |
| 2006 | 3,902.6 | 63.2% | 7,416 |
| 2007 | 2,574.9 | 41.7% | 7,599 |
| 2008 | 2,813.2 | 44.0% | 7,300 |
| 2009 | 2,323.7 | 36.2% | 6,895 |
| 2010 | 2,127.2 | 32.2% | 6,960 |
| 2011 | 2,686.2 | 40.6% | 7,039 |
| 2012 | 2,755.7 | 41.5% | 6,963 |
| 2013 | 2,344.4 | 35.4% | 6,893 |
| 2014 | 3,022.4 | 45.6% | 6,811 |
| 2015 | 3,352.9 | 50.6% | 6,851 |
| 2016 | 3,079.2 | 44.7% | 6,872 |
| 2017 | 2,475 | 36.0% | 7,297 |
| 2018 | 3,115.8 | 45.3% | 7,342 |
| 2019 | 4,082.2 | 58.5% | 7,280 |
| 2020 | 4,103.4 | 57.1% | 7,183 |
| 2021 | 4,063.6 | 59.7% | 7,104 |
| 2022 | 4,529.7 | 66.5% | 7,235 |
| 2023 | 4,377 | 63.7% | 7,247 |
| 2024 | 5,029.3 | 72.3% | 7,142 |
| 2025 | 4,144.3 | 59.2% | 7,115 |
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 |
|---|---|---|---|---|---|---|---|---|
| CTG1 | Natural Gas Fired Combined Cycle | CT | 223.5 | 165.5 | May 2002 | Operating | — | coming soon |
| CTG2 | Natural Gas Fired Combined Cycle | CT | 222 | 165.5 | May 2002 | Operating | — | coming soon |
| CTG3 | Natural Gas Fired Combined Cycle | CT | 223.5 | 165.5 | May 2002 | Operating | — | coming soon |
| STG1 | Natural Gas Fired Combined Cycle | CA | 439 | 303 | May 2002 | Operating | — | coming soon |
Owner / operator
Operator: City of San Antonio - (TX). Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| City of San Antonio - (TX) | 100.0% | 1,108 MW |
Nearby plants
Within 80 km.
| Niagara Bottling - Seguin | 5 MW | 0.6 km |
| TP 4 | 2 MW | 5.6 km |
| Abbott TP 3 | 3 MW | 6.5 km |
| Nolte | 2 MW | 7.3 km |
| Dunlap TP 1 | 4 MW | 8.8 km |
| Libra Storage | 236 MW | 14.4 km |