How many power plants does Otter Tail Power operate?

EIA-860M lists 13 operating plants against “Otter Tail Power Co” for 2026-07, totalling 2 GW of nameplate capacity in 3 states.

Is Otter Tail Power 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.

Otter Tail Power plants

Every generating plant EIA-860M files against Otter Tail Power for 2026-07: 13 plants, 2 GW of nameplate capacity, across 3 states and 6 energy sources.

EIA files this entity as “Otter Tail Power Co”.

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: 13
Nameplate capacity: 2 GW
States: 3; MN, ND, SD
Energy sources: 6

Otter Tail Power plants by energy source

Coal2 plants · 901 MW
Hydro1 plants · 1 MW
Natural gas2 plants · 400 MW
Petroleum2 plants · 72 MW
Solar1 plants · 50 MW
Wind5 plants · 350 MW

Full list of Otter Tail Power plants

Power plants operated by Otter Tail Power Co

Big Stone2 technologies	Otter Tail Power Co	Grant	451	2	1975	Operating
CoyoteConventional Steam Coal	Otter Tail Power Co	Mercer	450	1	1981	Operating
Astoria StationNatural Gas Fired Combustion Turbine	Otter Tail Power Co	Deuel	349	1	2021	Operating
Merricourt Wind Energy CenterOnshore Wind Turbine	Otter Tail Power Co	McIntosh	150	1	2020	Operating
Ashtabula Wind III LLCOnshore Wind Turbine	Otter Tail Power Co	Barnes	62.4	1	2010	Operating
Solway CT2 technologies	Otter Tail Power Co	Beltrami	51.3	2	2003	Operating
Hoot Lake SolarSolar Photovoltaic	Otter Tail Power Co	Otter Tail	49.9	1	2023	Operating
Luverne Wind Energy CenterOnshore Wind Turbine	Otter Tail Power Co	Steele	49.5	1	2009	Operating
JamestownPetroleum Liquids	Otter Tail Power Co	Stutsman	48.2	2	1976	Standby/Backup
Ashtabula Wind Energy CenterOnshore Wind Turbine	Otter Tail Power Co	Barnes	48	1	2008	Operating
Langdon Wind Energy CenterOnshore Wind Turbine	Otter Tail Power Co	Cavalier	40.5	1	2007	Operating
Lake PrestonPetroleum Liquids	Otter Tail Power Co	Kingsbury	24.1	1	1978	Standby/Backup
Hoot LakeConventional Hydroelectric	Otter Tail Power Co	Otter Tail	1	1	1914	Operating

Otter Tail Power: FAQ

How many power plants does Otter Tail Power operate?: EIA-860M lists 13 operating plants against “Otter Tail Power Co” for 2026-07, totalling 2 GW of nameplate capacity in 3 states.
Is Otter Tail Power 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.