In Campbell County, Wyoming (WY). 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 Wygen III?

116 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.

EIA-860M names Black Hills Power, Inc. 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 Wygen III LLC?

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

Is Wygen III still running?

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

Wygen III

Wygen III is a 116 MW coal power plant in Campbell County, Wyoming, operated by Black Hills Power, Inc.. EIA-860M lists 1 generating unit here. Its unit entered service in 2010.

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: 116 MW; 100 MW net summer
Generating units: 1
In service: 2010
EIA plant ID: 56596

Where it is

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County: Campbell County, Wyoming
Coordinates: 44.2919, -105.3806
Balancing authority: WACM
Sector: Electric Utility

Units, technology and status

Operator of record: Black Hills Power, Inc.
Primary energy source: Coal
Technologies: Conventional Steam Coal
Status: Operating

Every plant Black Hills Power, Inc. reports to EIA →

Wygen III: FAQ

Where is Wygen III?: In Campbell County, Wyoming (WY). 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 Wygen III?: 116 MW of nameplate capacity across 1 unit, as of the EIA-860M release for 2026-07.
Who owns Wygen III?: EIA-860M names Black Hills Power, Inc. 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 Wygen III LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Black Hills Power, Inc. 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 "Wygen III LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Wygen III still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.