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Energy Generation

Delivering reliable, low-cost, and responsible power for decades to come

We create electricity from coal, hydroelectric, natural gas, oil, solar, and wind facilities. We also purchase electricity from the Midcontinent Independent System Operator, or MISO, energy market when buying it is more economical than generating it ourselves. This mix ensures reliable, low-cost, and increasingly clean electricity 24 hours a day, 7 days a week.

Our Integrated Resource Plan outlines the combination of resources our company will use to meet our customers’ needs for reliable service during the next 15 years.

Our energy mix

Resource Nameplate capacity (MW) Fuel source
Big Stone Plant 1 475.0 total
256.0 Otter Tail Power		 Coal 
(sub-bituminous)
Coyote Station 2 427.0 total
149.5 Otter Tail Power		 Coal
(lignite)
Astoria Station 249.7 Natural gas
Merricourt Wind Energy Center 150.0 Wind
Ashtabula III Wind Energy Center 62.4 Wind
Hoot Lake Solar 49.9 Solar
Luverne Wind Energy Center 49.5 Wind
Ashtabula Wind Energy Center 48.0 Wind
Solway Combustion Turbine 42.4 Natural gas
Jamestown Combustion Turbines (2 turbines) 41.0 Oil
Langdon Wind Energy Center 40.5 Wind
Lake Preston Combustion Turbine 19.4 Oil
Fergus Falls Hydroelectric Plants (5 plants) 2.6 Water
Blue Jay Solar/Blue Heron Solar <0.1 Solar
1 Plant co-owners are Otter Tail Power (53.9 percent), NorthWestern Energy (23.4 percent), and Montana-Dakota 
Utilities Co. (22.7 percent). We operate and maintain the plant on behalf of the co-owners.
2 Plant co-owners are Otter Tail Power (35 percent), Montana-Dakota Utilities Co. (25 percent), Northern 
Municipal Power Agency (30 percent), and NorthWestern Energy (10 percent). We operate and maintain the 
plant on behalf of the co-owners.

Read our full ESG Report and learn how we’re introducing new energy sources, protecting the environment, partnering for positive change, and delivering power for local communities to thrive.