San Miguel — Plant Summary
- EIA Plant ID
- 6183
- Capacity
- 410 MW
- Primary Fuel
- Lignite
- Technology
- Conventional Steam Coal
- Status
- Operating
- Location
- Atascosa, TX
- Operating Since
- 1982
- Generators
- 1
- Operator
- San Miguel Electric Coop, Inc
- Parent Company
- —
- Annual Generation
- 1,421,219 MWh
- Capacity Factor
- 39.5%
- Balancing Authority
- Electric Reliability Council of Texas, Inc.
- ISO/RTO
- ERCOT
- NERC Region
- TRE
San Miguel
OperatingLignite
Ranked #2 of 3 Lignite plants in TX#7 of 9 nationally
410 MW Lignite operating in Atascosa, TX — Electric Reliability Council of Texas, Inc.
EIAWD
410 MW
Nameplate Capacity
1
Generators
unit
Conventional Steam Coal
Technology
1982
Operating Since
Location
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | San Miguel Electric Coop, Inc | — | — |
| Owner(s) | San Miguel Electric Coop, Inc | — | — |
| Status | Operating | — | — |
Ownership Chain
No GEM tracker match for this plant — ownership chain unavailable.
About
The San Miguel power plant is a 410 MW conventional steam coal facility located in Atascosa County, Texas. The plant began operating in 1982 and has one generator. It is owned and operated by San Miguel Electric Coop, Inc. The primary fuel source for the plant is lignite (LIG).
In the most recent year with available data, the San Miguel plant generated 1,421,219 MWh of electricity, achieving a capacity factor of 39.5%. The plant operates within the Electric Reliability Council of Texas, Inc. (ERCOT) balancing authority. San Miguel ranks as the second-largest of three lignite plants in Texas, and seventh-largest of eight lignite plants nationally.
Generated from EIA, GEM, and public data sources
Engineering & Generators
Grid Context
NERC Region
TRE
Balancing Authority
Electric Reliability Council of Texas, Inc.
Grid Voltage
345 kV
Regulatory Status
RE
Entity Type
Cooperative
Sector
Electric Utility
Generation
107.8K MWh
Latest Month
1.4M MWh
Annual Generation
39.5%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
San Miguel Switchyard · 345 kV
Substation Distance
< 10 km
Operator
South Texas Electric Cooperative
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ERCOT
LMP Node
SAN_SANMIGG1
Pricing Hub
HB_SOUTH
Secondary Zone
LZ_SOUTH
Location Type
Resource Node
Node Source
EIA-860 direct report
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