How many power plants does NorthWestern Energy - (SD) operate?

EIA-860M lists 6 operating plants against “NorthWestern Energy - (SD)” for 2026-07, totalling 279 MW of nameplate capacity in 1 state.

Is NorthWestern Energy - (SD) the owner of these plants?

EIA-860M names one reporting entity per generator. That entity operates the plant on the survey; ownership can sit with a parent, a partnership or a tax-equity structure that the form does not record.

Why are affiliates listed separately?

Because EIA files them separately. Rolling subsidiaries into a parent would need an ownership map EIA-860M does not publish, so this page does not invent one.

NorthWestern Energy - (SD) power plants

Every generating plant EIA-860M files against NorthWestern Energy - (SD) for 2026-07: 6 plants, 279 MW of nameplate capacity, across 1 state and 3 energy sources.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Plants: 6
Nameplate capacity: 279 MW
States: 1; SD
Energy sources: 3

NorthWestern Energy - (SD) plants by energy source

Natural gas3 plants · 193 MW
Petroleum2 plants · 5 MW
Wind1 plants · 80 MW

Full list of NorthWestern Energy - (SD) power plants

Power plants operated by NorthWestern Energy - (SD)

Aberdeen CT2 technologies	NorthWestern Energy - (SD)	Brown	111	2	1978	Operating
Beethoven WindOnshore Wind Turbine	NorthWestern Energy - (SD)	Bon Homme	80	1	2015	Operating
Bob Glanzer Generating StationNatural Gas Internal Combustion Engine	NorthWestern Energy - (SD)	Beadle	69	6	2022	Operating
Yankton2 technologies	NorthWestern Energy - (SD)	Yankton	13.4	4	1963	Standby/Backup
Clark (SD)Petroleum Liquids	NorthWestern Energy - (SD)	Clark	2.7	1	1970	Standby/Backup
FaulktonPetroleum Liquids	NorthWestern Energy - (SD)	Faulk	2.7	1	1969	Standby/Backup

NorthWestern Energy - (SD): FAQ

How many power plants does NorthWestern Energy - (SD) operate?: EIA-860M lists 6 operating plants against “NorthWestern Energy - (SD)” for 2026-07, totalling 279 MW of nameplate capacity in 1 state.
Is NorthWestern Energy - (SD) the owner of these plants?: EIA-860M names one reporting entity per generator. That entity operates the plant on the survey; ownership can sit with a parent, a partnership or a tax-equity structure that the form does not record.
Why are affiliates listed separately?: Because EIA files them separately. Rolling subsidiaries into a parent would need an ownership map EIA-860M does not publish, so this page does not invent one.