Where is Marengo Wind Plant?

In Columbia County, Washington (WA). 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 Marengo Wind Plant?

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

Who owns Marengo Wind Plant?

EIA-860M names PacifiCorp 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 Marengo Wind Plant LLC?

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

Is Marengo Wind Plant still running?

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

Marengo Wind Plant

Marengo Wind Plant is a 234 MW wind farm in Columbia County, Washington, operated by PacifiCorp. EIA-860M lists 2 generating units here. Its units entered service between 2007 and 2008.

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: 234 MW; 234 MW net summer
Generating units: 2
In service: 2007–2008
EIA plant ID: 56466

Where it is

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County: Columbia County, Washington
Coordinates: 46.3747, -117.7772
Balancing authority: PACW
Sector: Electric Utility

Units, technology and status

Operator of record: PacifiCorp
Primary energy source: Wind
Technologies: Onshore Wind Turbine
Status: Operating

Every plant PacifiCorp reports to EIA →

Marengo Wind Plant: FAQ

Where is Marengo Wind Plant?: In Columbia County, Washington (WA). 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 Marengo Wind Plant?: 234 MW of nameplate capacity across 2 units, as of the EIA-860M release for 2026-07.
Who owns Marengo Wind Plant?: EIA-860M names PacifiCorp 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 Marengo Wind Plant LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — PacifiCorp 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 "Marengo Wind Plant LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Marengo Wind Plant still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.