Where is Westlake Plaquemine?

In Iberville County, Louisiana (LA). 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 Westlake Plaquemine?

306 MW of nameplate capacity across 3 units, as of the EIA-860M release for 2026-07.

Who owns Westlake Plaquemine?

EIA-860M names Westlake Chemicals & Vinyls 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 Westlake Plaquemine LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Westlake Chemicals & Vinyls 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 "Westlake Plaquemine LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Westlake Plaquemine still running?

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

Westlake Plaquemine

Westlake Plaquemine is a 306 MW natural gas power plant in Iberville County, Louisiana, operated by Westlake Chemicals & Vinyls LLC. EIA-860M lists 3 generating units here, inside MISO. Its units entered service in 1997.

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: 306 MW; 225 MW net summer
Generating units: 3
In service: 1997
EIA plant ID: 55051

Where it is

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County: Iberville County, Louisiana
Coordinates: 30.2586, -91.185
Balancing authority: MISO
Sector: Industrial CHP

Units, technology and status

Operator of record: Westlake Chemicals & Vinyls LLC
Primary energy source: Natural gas
Technologies: Natural Gas Fired Combustion Turbine
Status: Operating

Every plant Westlake Chemicals & Vinyls LLC reports to EIA →

Westlake Plaquemine: FAQ

Where is Westlake Plaquemine?: In Iberville County, Louisiana (LA). 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 Westlake Plaquemine?: 306 MW of nameplate capacity across 3 units, as of the EIA-860M release for 2026-07.
Who owns Westlake Plaquemine?: EIA-860M names Westlake Chemicals & Vinyls 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 Westlake Plaquemine LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Westlake Chemicals & Vinyls 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 "Westlake Plaquemine LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Westlake Plaquemine still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.