Limestone — Plant Summary
- EIA Plant ID
- 298
- Capacity
- 1849.8 MW
- Primary Fuel
- Coal
- Technology
- Conventional Steam Coal
- Status
- Operating
- Location
- Limestone, TX
- Operating Since
- 1985
- Generators
- 2
- Operator
- NRG Texas Power LLC
- Parent Company
- NRG Energy
- Annual Generation
- 7,523,395 MWh
- Capacity Factor
- 46.3%
- Balancing Authority
- Electric Reliability Council of Texas, Inc.
- ISO/RTO
- ERCOT
- NERC Region
- TRE
Limestone
OperatingSub. Coal
Ranked #3 of 9 Sub. Coal plants in TX#12 of 103 nationally
1849.8 MW Sub. Coal operating in Limestone, TX — Electric Reliability Council of Texas, Inc.
EIAWD
1,849.8 MW
Nameplate Capacity
2
Generators
units
Conventional Steam Coal
Technology
1985
Operating Since
Location
Coordinates
31.4219, -96.2525
County
Limestone, TX
Nearby Plants
- Diver Solar, LLCSolar225 MW · 23.1 km
- Avant Prairie ESSBESS200 MW · 25.8 km
Ownership & Operator
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | NRG Texas Power LLC | NRG Texas Power | — |
| Owner(s) | NRG Texas Power LLC | NRG Energy | — |
| Status | Operating | — | — |
Ownership Chain
About
Limestone Generating Station is a coal-fired power plant in the United States, one of the largest in Texas. In 2022 it was the 6th largest emitter of carbon dioxide in the state. In 2022 there was an underground fire of a conveyor belt linking from a disused mine. It is one of 3 most NOx emitting power plants in Texas.
Read more on WikipediaThe Limestone power plant is located in Limestone County, Texas. It is a conventional steam coal plant with a total capacity of 1849.8 MW across two generators. The plant began operating in 1985 and is owned by NRG Energy, with NRG Texas Power LLC as the operator. Limestone is the second-largest coal plant in Texas (out of 8) and the ninth-largest in the United States (out of 75).
In the most recent year with available data, Limestone generated 7,523,395 MWh of electricity, resulting in a capacity factor of 46.3%. The plant operates within the Electric Reliability Council of Texas (ERCOT) balancing authority, which falls under the Texas Reliability Entity (TRE) NERC region.
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
NR
Entity Type
Independent Power Producer
Sector
IPP Non-CHP
Generation
428.1K MWh
Latest Month
7.5M MWh
Annual Generation
46.3%
Capacity Factor
Jan 2023 – Dec 2025
Financial Data
No financial data available for this plant.
Pricing & Market Data
HIGH confidencePoint of Interconnection
Nearest Substation
Limestone Station · 345 kV
Substation Distance
< 10 km
Operator
CenterPoint Energy
Coord Source
OSM spatial
Market Position
ISO/RTO Market
ERCOT
LMP Node
LEG_LEG_G2
Pricing Hub
HB_NORTH
Secondary Zone
LZ_NORTH
Location Type
Resource Node
Node Source
EIA-860 direct report
News & Articles (10)Beta
General
Texas Boosts Power Grid: Gov. Abbott Announces NRG's $617M Natural Gas Plant In Harris County
Texas Gov. Greg Abbott announced NRG Energy's plans to build $617 million natural gas power plant in Harris County.
Dallas Express·4 weeks ago
General
NRG Energy to expand power plant complex in northeast Harris County
The company plans to build another natural gas facility that will power about 110000 homes once it is completed.
Houston Public Media·4 weeks ago
General
NRG Energy to build $617M power plant in Harris County, Governor Abbott announces
A $617 million investment is coming to Harris County as NRG Energy plans a new 455-megawatt natural gas plant at its Greens Bayou facility...
Click2Houston·4 weeks ago
General
Gov. Abbott announces new NRG power plant to be located near Houston’s Greens Bayou
NRG Energy to build a $617M natural gas power plant in Texas to enhance energy infrastructure and meet rising energy demand by 2028.
CW39 Houston·4 weeks ago
Last updated 2026-03-26
View all 10 articles