San Miguel
Coal power plant in Atascosa County, Texas. 410 MW of nameplate capacity across 1 generator, operated by San Miguel Electric Coop, Inc.
Also known as San Miguel Power Plant · EIA plant 6183
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Key facts
- Capacity
- 410 MWNameplate
- Generators
- 1 operatingEIA-860M, August 2026
- Operating since
- January 1982First generator online
- Operator
- San Miguel Electric Coop, IncEIA operator ID 16624
- Grid
- ERCOTBalancing authority ERCO
- Price nodes
- 1 ERCOT nodeResource nodes with prices
- Location
- Atascosa County, TX28.7044, −98.4775
- EIA plant ID
- 6183EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power San Miguel produces
Free · EIA-923Net generation, 2025
1.42 TWh
1,421,219 MWh, final
Capacity factor, 2025
39.6%
2024: 36.2%
January to July 2026
668 GWh
Provisional. 6 of 7 months reported
Range, 2015 to 2025
1.3–2.6
TWh a year. Low 2024, high 2017
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | 2,980,041 | Not reported | 12 of 12 |
| 2001 | 2,824,026 | Not reported | 12 of 12 |
| 2002 | 2,855,097 | Not reported | 12 of 12 |
| 2003 | 2,688,833 | Not reported | 12 of 12 |
| 2004 | 2,648,725 | Not reported | 12 of 12 |
| 2005 | 2,850,653 | Not reported | 12 of 12 |
| 2006 | 2,937,194 | Not reported | 12 of 12 |
| 2007 | 2,713,947 | Not reported | 12 of 12 |
| 2008 | 2,706,129 | Not reported | 12 of 12 |
| 2009 | 2,861,774 | Not reported | 12 of 12 |
| 2010 | 2,859,362 | 79.6% | 12 of 12 |
| 2011 | 2,952,760 | 82.2% | 12 of 12 |
| 2012 | 2,901,545 | 80.6% | 12 of 12 |
| 2013 | 2,678,806 | 74.6% | 12 of 12 |
| 2014 | 2,173,032 | 60.5% | 12 of 12 |
| 2015 | 2,169,628 | 60.4% | 12 of 12 |
| 2016 | 2,351,858 | 65.3% | 12 of 12 |
| 2017 | 2,556,977 | 71.2% | 12 of 12 |
| 2018 | 2,509,410 | 69.9% | 12 of 12 |
| 2019 | 2,071,883 | 57.7% | 12 of 12 |
| 2020 | 2,318,144 | 64.4% | 12 of 12 |
| 2021 | 1,903,062 | 53.0% | 12 of 12 |
| 2022 | 2,099,389 | 58.5% | 12 of 12 |
| 2023 | 1,384,087 | 38.5% | 12 of 12 |
| 2024 | 1,305,128 | 36.2% | 12 of 12 |
| 2025 | 1,421,219 | 39.6% | 12 of 12 |
| 2026 (provisional, partial year) | 667,864 | 37.5% | 6 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
1.72M
US short tons. 2024: 1.77M
SO₂, 2025
5,078
US short tons
NOx, 2025
1,024
US short tons
CO₂ per MWh, calculated
1.21 t
About 2,425 lb per MWh
1 of 1 EPA units reported CO₂ in 2025 (SM-1), matched to EIA plant 6183 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
1,325
million gallons
Consumption, 2024
1,325
million gallons
Source
Wells
Ground, Fresh. Induced-draft tower
Watershed stress
Severe · 0.977
USGS SUI, HUC12 Turkey Creek-Parita Creek
12 of 12 cooling months report withdrawal. Groundwater user; SUI describes surface water and is context only. Blank volumes are unreported, not zero.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Conventional Steam Coal | 410.0 | January 1982 |
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 San Miguel Electric Coop, Inc 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 San Miguel
Questions about San Miguel
How much power does San Miguel produce?
San Miguel reported 1,421,219 MWh (1.42 TWh) of net generation in 2025, a 39.6% capacity factor on 410 MW of nameplate capacity. From January to July 2026 it reported 668 GWh, which is provisional.
Where is San Miguel?
San Miguel is in Atascosa County, Texas, at 28.7044, −98.4775. It is in the Electric Reliability Council of Texas, Inc. balancing area (ERCO).
Who operates San Miguel?
EIA-860M for August 2026 lists San Miguel Electric Coop, Inc as the operator (EIA operator ID 16624). The operator is not always the owner.
When did San Miguel start operating?
Its first generator began operating in January 1982, according to EIA-860M.
Does InfraMap have power prices for San Miguel?
Yes. InfraMap has ERCOT day-ahead and real-time prices at 1 price node linked to San Miguel, 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