# Martin Lake

ERCOT asset profile · https://askthegrid.com/assets/facilities/martin-lake

Luminant · Rusk County · ERCOT

Martin Lake is a three-unit coal-fired steam station near Tatum in Rusk County, Texas. EIA reports 2,410 MW of net summer capability for Plant 6146, and ERCOT identifies the generators as MLSES_UNIT1, MLSES_UNIT2, and MLSES_UNIT3. Luminant Generation Company operates the Vistra-owned station. The units entered service from 1977 through 1979; Unit 1 returned to service in February 2026 after a November 2024 fire.

## Profile

- **Grid role:** Three conventional steam coal generators in the ERCOT North zone.
- **Plant configuration:** Three conventional steam coal generators entered service in 1977, 1978, and 1979. Vistra reports 2,250 MW of plant nameplate capacity, while EIA reports 2,410 MW of net summer capability. EPA records identify cold-side electrostatic precipitators, wet flue-gas-desulfurization systems, and activated-carbon injection on all three units.
- **Grid connection:** ERCOT resource nodes MLSES_UNIT1, MLSES_UNIT2, and MLSES_UNIT3; the existing Martin Lake 345-kV substation is owned by Oncor Electric Delivery.
- **Environmental controls:** EPA records identify cold-side ESP, wet-scrubber, and activated-carbon-injection controls. Fluor announced EPC work for SNCR and activated-carbon-injection projects at Martin Lake in 2008.

## Metrics

- **Reported capacity:** 2,410 MW — EIA-reported net summer capability; other nameplate and seasonal ratings may differ.
- **Technology:** Conventional Steam Coal — Primary generation technology.
- **Registry anchor:** Plant 6146 — Rusk County · ERCOT
- **Operating status:** Operating — Martin Lake is operating.
- **Resource stack:** 3 resources — MLSES_UNIT1 · MLSES_UNIT2 · MLSES_UNIT3

## Facts

- **Operating status:** Operating — ERCOT lists all three MLSES resources as operating; Unit 1 returned to service in February 2026. · confidence: high
- **Owner / operator:** Luminant Generation Company LLC — Vistra is the parent company. · confidence: high
- **Plant configuration:** 3 coal steam units — Units entered service in 1977, 1978, and 1979. · confidence: high

## Related parties

- **Operator:** Luminant Generation Company LLC — Operator for Martin Lake ([source](https://luminant.com/))

## Sources

- [EIA Form 860](https://www.eia.gov/electricity/data/eia860/) — U.S. Energy Information Administration · regulatory — Plant identity, operator, technology, capacity, and generator records.
- [Martin Lake 345-kV substation filing](https://interchange.puc.texas.gov/Documents/55999_200_1569846.PDF) — Public Utility Commission of Texas · regulatory — Existing 345-kV substation ownership and transmission context.

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Canonical page: https://askthegrid.com/assets/facilities/martin-lake
Website: [Vistra Corp](https://vistracorp.com/)
Profile published: 2026-07-17T03:34:32.994Z
Source: Ask the Grid — https://askthegrid.com/