Barney M Davis
Natural gas power plant in Nueces County, Texas. 1,082.2 MW of nameplate capacity across 4 generators, operated by City of San Antonio - (TX).
Also known as Barney Davis Power Plant · EIA plant 4939
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 1,082.2 MWNameplate
- Generators
- 4 operatingEIA-860M, August 2026
- Operating since
- May 1974First generator online
- Operator
- City of San Antonio - (TX)EIA operator ID 16604
- Grid
- ERCOTBalancing authority ERCO
- Price nodes
- 1 ERCOT nodeResource nodes with prices
- Location
- Nueces County, TX27.6064, −97.3117
- EIA plant ID
- 4939EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Barney M Davis produces
Free · EIA-923Net generation, 2025
1.58 TWh
1,579,099 MWh, final
Capacity factor, 2025
16.7%
2024: 16.4%
January to July 2026
893 GWh
Provisional
Range, 2015 to 2025
0.9–1.8
TWh a year. Low 2016, high 2018
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 3,455,934 | Not reported | 12 of 12 |
| 2001 | 2,993,651 | Not reported | 12 of 12 |
| 2002 | 1,563,689 | Not reported | 12 of 12 |
| 2003 | 1,057,732 | Not reported | 12 of 12 |
| 2004 | 664,326 | Not reported | 7 of 12 |
| 2005 | 817,840 | Not reported | 12 of 12 |
| 2006 | 527,265 | Not reported | 12 of 12 |
| 2007 | 276,375 | Not reported | 12 of 12 |
| 2008 | 720,316 | Not reported | 12 of 12 |
| 2009 | 302,790 | Not reported | 12 of 12 |
| 2010 | 1,817,573 | Not reported | 10 of 12 |
| 2011 | 2,206,487 | 23.3% | 12 of 12 |
| 2012 | 2,615,871 | 27.5% | 12 of 12 |
| 2013 | 2,309,173 | Not reported | 12 of 12 |
| 2014 | 1,793,002 | 18.9% | 12 of 12 |
| 2015 | 1,728,431 | 18.2% | 12 of 12 |
| 2016 | 900,721 | 9.5% | 12 of 12 |
| 2017 | 1,197,723 | 12.6% | 12 of 12 |
| 2018 | 1,800,646 | 19.0% | 12 of 12 |
| 2019 | 1,547,751 | 16.3% | 12 of 12 |
| 2020 | 1,228,027 | 14.1% | 11 of 12 |
| 2021 | 1,057,830 | 12.2% | 11 of 12 |
| 2022 | 1,284,352 | 14.8% | 11 of 12 |
| 2023 | 1,540,696 | 16.3% | 12 of 12 |
| 2024 | 1,560,909 | 16.4% | 12 of 12 |
| 2025 | 1,579,099 | 16.7% | 12 of 12 |
| 2026 (provisional, partial year) | 893,424 | 16.2% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · ERCOTEmissions
Free · EPA CAMPDCO₂, 2025
728,923
US short tons. 2024: 746,900
SO₂, 2025
4
US short tons
NOx, 2025
98
US short tons
CO₂ per MWh, calculated
0.46 t
About 923 lb per MWh
3 of 3 EPA units reported CO₂ in 2025 (1, 3, 4), matched to EIA plant 4939 through the EPA–EIA crosswalk. The per-MWh rate is EPA CO₂ divided by EIA-923 net generation. The two reporting boundaries can differ.
Water use
Free · EIA-923 cooling, USGSWithdrawal, 2024
122,207
million gallons
Consumption, 2024
Not reported
million gallons
Source
Laguna Madre
Surface, Saline. Once-through with cooling pond
12 of 12 cooling months report withdrawal. Saline, brackish or ocean intake; not tested. Cooling-pond plants report water circulated through the pond as withdrawal, so withdrawal is far above consumption. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Natural Gas Steam Turbine | 352.0 | May 1974 |
| 2 | Natural Gas Fired Combined Cycle | 351.0 | July 1976 |
| 3 | Natural Gas Fired Combined Cycle | 189.6 | March 2010 |
| 4 | Natural Gas Fired Combined Cycle | 189.6 | March 2010 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists City of San Antonio - (TX) as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Barney M Davis
More plants operated by City of San Antonio - (TX)
Questions about Barney M Davis
How much power does Barney M Davis produce?
Barney M Davis reported 1,579,099 MWh (1.58 TWh) of net generation in 2025, a 16.7% capacity factor on 1,082.2 MW of nameplate capacity. From January to July 2026 it reported 893 GWh, which is provisional.
Where is Barney M Davis?
Barney M Davis is in Nueces County, Texas, at 27.6064, −97.3117. It is in the Electric Reliability Council of Texas, Inc. balancing area (ERCO).
Who operates Barney M Davis?
EIA-860M for August 2026 lists City of San Antonio - (TX) as the operator (EIA operator ID 16604). The operator is not always the owner.
When did Barney M Davis start operating?
Its first generator began operating in May 1974, according to EIA-860M.
Does InfraMap have power prices for Barney M Davis?
Yes. InfraMap has ERCOT day-ahead and real-time prices at 1 price node linked to Barney M Davis, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- EPA CAMPD annual emissions through the EPA–EIA crosswalk, 1995 to 2025
- ERCOT day-ahead and real-time prices; node and hub assignments as of 2026-10-05
- EIA-923 cooling water 2024 and the USGS surface water supply and use index, Water years 2010-2020 (Oct 2009 to Sep 2020), mean of monthly values
- Plant names from OpenStreetMap, © OpenStreetMap contributors (ODbL)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page