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410 MW Lignite operating in Atascosa, TX — Electric Reliability Council of Texas, Inc.
410 MW
Nameplate Capacity
1
Generators
unit
Conventional Steam Coal
Technology
1982
Operating Since
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | San Miguel Electric Coop, Inc | — | — |
| Owner(s) | San Miguel Electric Coop, Inc | — | — |
| Status | Operating | — | — |
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
ISO/RTO
ERCOT
Market
ISO/RTO Member
NERC Region
TRE — Texas Reliability Entity
Balancing Authority
107.8K MWh
Latest Month
1.4M MWh
Annual Generation
39.5%
Capacity Factor
CO₂ Intensity
2850 lb/MWh
NOx
2 lb/MWh
SO₂
Point 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
Alt. Hub / Zone
LZ_SOUTH
Location Type
Resource Node
Node Source
EIA-860 direct report
Last updated 2026-03-26
View all articlesElectric Reliability Council of Texas, Inc. (ERCO)
Grid Voltage
345.0 kV
Regulatory Status
RE — Regulated
Entity Type
Cooperative
Sector
Electric Utility
7 lb/MWh
CH₄
0.328 lb/MWh
N₂O
0.048 lb/MWh
Capacity Factor
38.5%
Annual Net Gen
1384 GWh
CO₂eq
2872 lb/MWh
Subregion
ERCOT All