Where is Union Power Station?

In Union County, Arkansas (AR). 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 Union Power Station?

2 GW of nameplate capacity across 12 units, as of the EIA-860M release for 2026-07.

Who owns Union Power Station?

EIA-860M names Entergy Arkansas LLC 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 Union Power Station LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Entergy Arkansas LLC 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 "Union Power Station LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Union Power Station still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Union Power Station

Union Power Station is a 2 GW natural gas power plant in Union County, Arkansas, operated by Entergy Arkansas LLC. EIA-860M lists 12 generating units here, inside MISO. Its units entered service in 2003.

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: 2,428 MW; 2,048.6 MW net summer
Generating units: 12
In service: 2003
EIA plant ID: 55380

Where it is

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County: Union County, Arkansas
Coordinates: 33.2961, -92.5894
Balancing authority: MISO
Sector: Electric Utility

Units, technology and status

Operator of record: Entergy Arkansas LLC
Primary energy source: Natural gas
Technologies: Natural Gas Fired Combined Cycle
Status: Operating

Every plant Entergy Arkansas LLC reports to EIA →

Union Power Station: FAQ

Where is Union Power Station?: In Union County, Arkansas (AR). 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 Union Power Station?: 2 GW of nameplate capacity across 12 units, as of the EIA-860M release for 2026-07.
Who owns Union Power Station?: EIA-860M names Entergy Arkansas LLC 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 Union Power Station LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Entergy Arkansas LLC 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 "Union Power Station LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Union Power Station still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.