Limestone
NRG Texas Power LLC · Limestone County · ERCOT
Limestone Electric Generating Station is a two-unit coal and lignite-fired power plant near Jewett in Limestone County, Texas, registered as EIA Plant ID 298. EIA and NRG report 1,660 MW of net operating capacity. ERCOT lists Unit 1 as LEG_LEG_G1 with 893 MW installed and 831 MW seasonal capability, in service December 1, 1985, and Unit 2 as LEG_LEG_G2 with 957 MW installed and 857 MW seasonal capability, in service December 1, 1986. NRG Texas Power LLC owns and operates the station as a wholly owned NRG Energy subsidiary.
Overview
Key fields
- Net capacity
- 1,660 MW
EIA and NRG operating capacity.
- Technology
- Conventional steam
Two coal and lignite-fired units.
- Registry anchor
- Plant 298
NRG Texas Power LLC · Limestone County · ERCOT
- Unit 1 in service
- Dec 1, 1985
LEG_LEG_G1 · 893 MW installed · 831 MW seasonal.
- Unit 2 in service
- Dec 1, 1986
LEG_LEG_G2 · 957 MW installed · 857 MW seasonal.
- Resource stack
- 2 resources
LEG_LEG_G1 · LEG_LEG_G2
Profile
- Operating configuration
- Two conventional-steam coal and lignite units with 1,660 MW of reported net operating capacity.
- ERCOT resources
- LEG_LEG_G1 and LEG_LEG_G2 at the LIMESTONE settlement point.
- Air-quality controls
- NRG reports flue-gas desulfurization, low-NOx burners/overfire air, activated-carbon injection, and electrostatic precipitators.
Structured profile
- Net capacity
- 1,660 MW
EIA / NRG
- Installed ratings
- 893 / 957 MW
ERCOT Units 1 and 2
- Seasonal capability
- 831 / 857 MW
ERCOT Units 1 and 2
- Owner / operator
- NRG Texas Power LLC
Wholly owned NRG Energy subsidiary
- TCEQ regulated entity
- RN100542927
3964 N FM 39, Jewett
- Wastewater permit
- WQ0002430000
EPA ID TX0082651
Units and generators
Operating generator records and technology attributes reported through EIA-860.
| Generator | Capacity | Technology | Operation | Status |
|---|---|---|---|---|
| 1 | 893 MW 831 MW summer | Conventional Steam Coal Subbituminous Coal · ST | Dec 1985 Retirement: Dec 2029 | Operating |
| 2 | 956.8 MW 857 MW summer | Conventional Steam Coal Subbituminous Coal · ST | Dec 1986 Retirement: Dec 2029 | Operating |
Performance
Monthly EIA generation history and recent market-resource behavior where linked telemetry is available.
Peer context
- Technology capacity
- 1,849.8 MW
- National rank
- #22
- TX rank
- #3
Monthly generation
Download CSVMonthly generation is reported through EIA-923. Capacity factor uses the current EIA nameplate capacity and is shown only for complete calendar years.
ERCOT disclosed dispatch
2 ERCOT market resources · Coal / lignite
Generation
3 mo through May 22, 2026Capacity factor is average output vs. this plant's observed peak.
Output by hourlocal time · 90 days through May 22, 2026
Latest disclosed outputhourly · 2 weeks ending May 22, 2026
Generation from ERCOT's 60-Day SCED Disclosure (≈60-day lag), summed over this site's market resources.
Grid and market context
Deterministic links to ERCOT market resources, price records, outage disclosures, queue records, and nearby infrastructure. Candidate joins remain labeled until corroborated.
Market registration
ERCOT public disclosuresOperating context
ERCOT market recordsNearby substations
HIFLD infrastructure inventoryRelated parties and identifiers
Parties, market resources, and identifiers tied to this asset, with owner, operator, developer, EPC, compliance provider, and interconnecting entity roles kept separate.
Relationship graph
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Parties and identifiers
| Relationship | Entity | Basis |
|---|---|---|
| Owner | Owner for Limestone | |
| Operator | Operator for Limestone | |
| Market resources | LEG_LEG_G1, LEG_LEG_G2 | Linked ERCOT resources. |
| Grid selection | plant:plant-298 | Canonical asset page /ercot/assets/plant/limestone. |
Reporting portfolio
| Largest reported plants | Capacity | State |
|---|---|---|
| W A Parish | 4,008.4 MW | TX |
| LimestoneCurrent | 1,849.8 MW | TX |
| Cedar Bayou | 1,530 MW | TX |
| T H Wharton | 1,189.9 MW | TX |
| Greens Bayou | 432 MW | TX |
| San Jacinto Steam Electric Station | 176.4 MW | TX |
Portfolio membership follows the latest EIA-860 reporting entity. It does not imply ultimate ownership.
View full reporting portfolioTimeline and sources
Project milestones and public references behind the asset profile.
Project timeline
- Generator enters operationEIA-860
EIA-860 lists generator 1 with this operating date.
- Generator enters operationEIA-860
EIA-860 lists generator 2 with this operating date.
- TCEQ acknowledged ongoing air-permit activityTCEQ operat...
TCEQ acknowledged NRG's annual operational-status notification for the listed Limestone air authorizations under RN100542927.
- Latest disclosed generation interval
ERCOT SCED disclosure is delayed, so plant performance windows end at the latest disclosed interval.
- Planned generator retirementEIA-860
EIA-860 lists a planned retirement for generator 1, generator 2.
Sources
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