J K Spruce
Bexar County, Texas · EIA plant ID 7097 · Operator: City of San Antonio - (TX)
Nameplate1,489MWSummer 1,345 MW
Generators2in service
Net generation6,426GWh12 mo to Aug 2026
Capacity factor55%gas/coal/oil units, summer MW
Heat rate9,568Btu/kWhfossil units, electric fuel, HHV
First online1992Runs 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) |
|---|---|---|---|
| 2001 | 4,470.7 | 92.0% | 12,038 |
| 2002 | 4,135.8 | 80.7% | 9,435 |
| 2003 | 4,385 | 85.6% | 9,621 |
| 2004 | 4,866.3 | 94.7% | 9,743 |
| 2005 | 4,190.5 | 81.8% | 9,788 |
| 2006 | 4,040.8 | 83.1% | 9,860 |
| 2007 | 4,107.2 | 84.5% | 9,876 |
| 2008 | 4,340.1 | 89.0% | 10,018 |
| 2009 | 3,623.2 | 74.5% | 9,971 |
| 2010 | 6,601.4 | 70.1% | 9,722 |
| 2011 | 8,978.5 | 77.1% | 9,569 |
| 2012 | 9,332.1 | 79.3% | 9,769 |
| 2013 | 7,536 | 64.2% | 9,735 |
| 2014 | 9,278.9 | 79.0% | 9,648 |
| 2015 | 4,525.8 | 38.3% | 10,224 |
| 2016 | 5,451.1 | 46.1% | 10,086 |
| 2017 | 5,987.6 | 50.8% | 10,044 |
| 2018 | 7,228.9 | 61.4% | 10,028 |
| 2019 | 6,692.3 | 56.8% | 9,961 |
| 2020 | 5,344.5 | 45.2% | 10,322 |
| 2021 | 7,329 | 62.2% | 10,121 |
| 2022 | 6,784.9 | 57.6% | 9,966 |
| 2023 | 5,077.9 | 43.1% | 10,104 |
| 2024 | 6,124.1 | 51.8% | 10,177 |
| 2025 | 6,462.3 | 54.9% | 9,776 |
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 | Conventional Steam Coal | ST | 566 | 560 | Dec 1992 | Operating · retirement planned | Dec 2028 | coming soon |
| 2 | Conventional Steam Coal | ST | 922.5 | 785 | May 2010 | 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% | 1,489 MW |
Nearby plants
Within 80 km.
| J T Deely | retired | 0.3 km |
| O W Sommers | 892 MW | 0.4 km |
| Padua 2 | 150 MW | 1.8 km |
| Padua 3 | — | 1.8 km |
| Padua 1 | 50 MW | 1.8 km |
| Rush ESS | — | 2.3 km |