O W SommersRetirement planned
Bexar County, Texas · EIA plant ID 3611 · Operator: City of San Antonio - (TX)
Nameplate892MWSummer 830 MW
Generators2in service
Net generation2,278GWh12 mo to Dec 2025
Capacity factor31%gas/coal/oil units, summer MW
Heat rate10,400Btu/kWhfossil units, electric fuel, HHV
First online1972Runs as intermediate
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 | 1,206.5 | 15.7% | 11,088 |
| 2002 | 814.9 | 10.9% | 11,134 |
| 2003 | 739.9 | 9.9% | 11,152 |
| 2004 | 644 | 8.6% | 11,329 |
| 2005 | 966.7 | 13.0% | 11,012 |
| 2006 | 1,305.5 | 18.0% | 11,166 |
| 2007 | 1,402.7 | 19.4% | 11,126 |
| 2008 | 1,390.3 | 18.0% | 11,318 |
| 2009 | 1,360.9 | 17.6% | 11,699 |
| 2010 | 761 | 9.9% | 12,276 |
| 2011 | 437.5 | 5.7% | 11,986 |
| 2012 | 660.1 | 9.0% | 11,890 |
| 2013 | 800.4 | 11.0% | 12,096 |
| 2014 | 470.9 | 6.5% | 12,399 |
| 2015 | 517.2 | 7.1% | 12,617 |
| 2016 | 424.3 | 5.8% | 12,662 |
| 2017 | 421.8 | 5.8% | 12,561 |
| 2018 | 912.4 | 12.6% | 11,857 |
| 2019 | 1,108.6 | 15.3% | 11,438 |
| 2020 | 914.4 | 12.5% | 11,945 |
| 2021 | 1,166.3 | 16.0% | 11,890 |
| 2022 | 1,401.3 | 19.3% | 11,679 |
| 2023 | 1,904.8 | 26.2% | 11,101 |
| 2024 | 2,531.7 | 34.7% | 10,711 |
| 2025 | 2,278.2 | 31.3% | 10,400 |
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 |
|---|---|---|---|---|---|---|---|---|
| 1 | Natural Gas Steam Turbine | ST | 446 | 420 | Apr 1972 | Operating · retirement planned | Mar 2027 | coming soon |
| 2 | Natural Gas Steam Turbine | ST | 446 | 410 | Jan 1974 | Operating · retirement planned | Mar 2029 | 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% | 892 MW |
Nearby plants
Within 80 km.
| J T Deely | retired | 0.1 km |
| J K Spruce | 1,489 MW | 0.4 km |
| Padua 1 | 50 MW | 1.9 km |
| Padua 3 | — | 1.9 km |
| Padua 2 | 150 MW | 1.9 km |
| Rush ESS | — | 2.7 km |