In Yankton County, South Dakota (SD). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

13 MW of nameplate capacity across 4 units, as of the EIA-860M release for 2026-07.

EIA-860M names NorthWestern Energy - (SD) 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 Yankton LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — NorthWestern Energy - (SD) 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 "Yankton LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Yankton still running?

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

Yankton

Yankton is a 13 MW natural gas power plant in Yankton County, South Dakota, operated by NorthWestern Energy - (SD). EIA-860M lists 4 generating units here, inside SPP. Its units entered service between 1963 and 1975.

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: 13.4 MW; 13.5 MW net summer
Generating units: 4
In service: 1963–1975
EIA plant ID: 8034

Where it is

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County: Yankton County, South Dakota
Coordinates: 42.8933, -97.3533
Balancing authority: SWPP
Sector: Electric Utility

Units, technology and status

Operator of record: NorthWestern Energy - (SD)
Primary energy source: Natural gas
Technologies: Natural Gas Internal Combustion Engine, Petroleum Liquids
Status: Standby/Backup

This site runs on more than one energy source. EIA-860M capacity splits: Natural gas 9 MW, Petroleum 5 MW. It is filed here under Natural gas, the source with the most capacity.

Every plant NorthWestern Energy - (SD) reports to EIA →

Yankton: FAQ

Where is Yankton?: In Yankton County, South Dakota (SD). 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 Yankton?: 13 MW of nameplate capacity across 4 units, as of the EIA-860M release for 2026-07.
Who owns Yankton?: EIA-860M names NorthWestern Energy - (SD) 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 Yankton LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — NorthWestern Energy - (SD) 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 "Yankton LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Yankton still running?: EIA-860M files it as "Standby/Backup" for 2026-07. Statuses change monthly, and this page follows the monthly release.