We own and maintain electric transmission lines in Minnesota, North Dakota, and South Dakota. Our transmission system is made up of high-voltage power lines that transmit electricity from generation plants to distribution substations. These lines also transmit power among utilities to ensure reliability within the region.
Large transmission projects
This transmission line will extend 160 to 170 miles from the Big Stone South Substation near Big Stone City, South Dakota, to the Ellendale Substation near Ellendale, North Dakota. Otter Tail Power Company and Montana-Dakota Utilities Co. own this project estimated to be in service in 2019. Our company is the lead developer and is managing construction.