# Limestone

ERCOT asset profile · https://askthegrid.com/assets/facilities/limestone

NRG Texas Power LLC - Limestone County - ERCOT

Limestone Generating Station is a two-unit, coal- and lignite-fired steam generating station near Jewett, Texas, wholly owned and operated by NRG Texas Power LLC. Unit 1 entered commercial service in December 1985 and Unit 2 in December 1986. The facility has a nameplate capacity of 1,849.8 MW and is located approximately nine miles north of Jewett in Limestone County. The station historically burned lignite from the adjacent Jewett Mine but also uses subbituminous coal. NRG replaced major equipment on Unit 2 in 2006. The facility operates as baseload generation in the ERCOT market and is interconnected at 345 kV.

## Metrics

- **Nameplate capacity:** 1849.8 MW — Canonical EIA plant baseline.
- **Registry anchor:** Plant 298 — plant-298

## Facts

- **Technology:** Conventional Steam Coal
- **Operator:** NRG Texas Power LLC

## Related parties

- **Owner / operator:** NRG Texas Power LLC — Current owner and operator ([source](https://www.nrg.com/))
- **Parent company:** NRG Energy, Inc. — Parent company ([source](https://www.nrg.com/))
- **Former owner / operator:** Texas Genco LLC — Predecessor owner/operator
- **Former owner:** Houston Lighting & Power Company — Earlier utility owner ([source](http://centerpointenergy.com/en-us/about-us))
- **Fuel supplier:** Jewett Mine — Lignite mine and fuel supplier
- **Balancing authority / market operator:** Electric Reliability Council of Texas — Balancing authority and wholesale market operator ([source](https://www.ercot.com/))
- **Regulator:** Texas Commission on Environmental Quality — Environmental regulator and permit administrator ([source](https://www.tceq.texas.gov/))
- **Transmission owner:** CenterPoint Energy Houston Electric, LLC — Transmission owner
- **Operator:** CERT Operations RCB LLC — Historical operator listed in regulatory records

## Sources

- [sec.gov](http://sec.gov/Archives/edgar/data/1328992/000104746905016455/a2158987zs-1.htm) — sec.gov · authoritative — Source retained for exact-record publication review.
- [api.eia.gov](https://api.eia.gov/v2/electricity/operating-generator-capacity/data?api_key=DEMO_KEY&data[0]=nameplate-capacity-mw&data[1]=net-summer-capacity-mw&data[2]=net-winter-capacity-mw&end=2025-12&facets[plantid][]=298&frequency=monthly&start=2025-12) — api.eia.gov · authoritative — Source retained for exact-record publication review.
- [interchange.puc.texas.gov](https://interchange.puc.texas.gov/Documents/55172_9_1310271.PDF) — interchange.puc.texas.gov · authoritative — Source retained for exact-record publication review.
- [investors.nrg.com](https://investors.nrg.com/news-releases/news-release-details/nrg-announces-comprehensive-repowering-initiative) — investors.nrg.com · public_source — Source retained for exact-record publication review.

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Canonical page: https://askthegrid.com/assets/facilities/limestone
Website: [NRG Texas Power LLC](https://www.nrg.com/)

Source: Ask the Grid — https://askthegrid.com/