Topaz Generating
Topaz Generating is a 605 MW natural gas power plant in Galveston County, Texas, operated by City of San Antonio - (TX). EIA-860M lists 10 generating units here, inside ERCOT. Its units entered service in 2021.
As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m
- Nameplate capacity
- 605 MW
- 445 MW net summer
- Generating units
- 10
- In service
- 2021
- EIA plant ID
- 63688
Where it is
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- County
- Galveston County, Texas
- Coordinates
- 29.4264, -94.9767
- Balancing authority
- ERCO
- Sector
- Electric Utility
Units, technology and status
- Operator of record
- City of San Antonio - (TX)
- Primary energy source
- Natural gas
- Technologies
- Natural Gas Fired Combustion Turbine
- Status
- Operating
Topaz Generating: FAQ
- Where is Topaz Generating?
- In Galveston County, Texas (TX). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
- How big is Topaz Generating?
- 605 MW of nameplate capacity across 10 units, as of the EIA-860M release for 2026-07.
- Who owns Topaz Generating?
- EIA-860M names City of San Antonio - (TX) as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
- Is this the same as Topaz Generating LLC?
- Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — City of San Antonio - (TX) here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Topaz Generating LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
- Is Topaz Generating still running?
- EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.