# Lake Hubbard

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

Luminant · Dallas County · ERCOT

Lake Hubbard Steam Electric Station is a two-unit natural-gas steam station in Sunnyvale, Dallas County, Texas. EIA's May 2026 inventory reports 927.5 MW nameplate and 915 MW net summer and winter capability. ERCOT's September 2026 resource outlook separately lists LHSES_UNIT1 and LHSES_UNIT2A at 928 MW installed and 915 MW seasonal capability in the North zone.

## Profile

- **Grid role:** Dispatchable natural-gas steam generation in ERCOT's North zone.
- **Current configuration:** Two operating steam units: 396.5 MW and 531 MW nameplate, with 392 MW and 523 MW net summer capability.
- **Market mapping:** Resources LHSES_UNIT1 and LHSES_UNIT2A; price nodes LHSES_UNIT1 and LHSES_UNIT2.
- **Environmental record:** TCEQ RN100673490; Federal Operating Permit O50; wastewater permit WQ0001245000.

## Metrics

- **Net summer capacity:** 915 MW — EIA May 2026 · two operating units
- **Nameplate capacity:** 927.5 MW — 396.5 MW · 531 MW
- **ERCOT installed:** 928 MW — September 2026 MORA
- **Resources:** 2 — LHSES_UNIT1 · LHSES_UNIT2A
- **Registry anchor:** Plant 3452 — Luminant Generation Company LLC · ERCOT

## Facts

- **Operating units:** 2 — June 1970 · November 1973 · confidence: high
- **ERCOT zone:** North — GAS-ST resources · confidence: high
- **TCEQ entity:** RN100673490 — Federal Operating Permit O50 · confidence: high

## Sources

- [EIA May 2026 generator inventory](https://www.eia.gov/electricity/data/eia860m/) — U.S. Energy Information Administration · regulatory — Current units, ratings, technology, dates, operator, and ERCOT assignment.
- [ERCOT September 2026 MORA](https://www.ercot.com/files/docs/2026/07/02/MORA_September2026.pdf) — Electric Reliability Council of Texas · regulatory — Resource identifiers, North zone, installed capacity, and seasonal capability.
- [Lake Hubbard O50 statement of basis](https://www.tceq.texas.gov/assets/public/permitting/air/publicnotice/34870sob.pdf) — Texas Commission on Environmental Quality · regulatory — Current Luminant permit holder, exact site, and Federal Operating Permit O50.

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Canonical page: https://askthegrid.com/assets/facilities/lake-hubbard
Website: [Vistra](https://vistracorp.com/)
Profile published: 2026-07-17T03:34:28.841Z
Source: Ask the Grid — https://askthegrid.com/