Transmission

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

Big Stone South South-to-Ellendale 345-kv line

This project is a 345-kv transmission line that 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 that's estimated to cost $293 million to $370 million and be in service in 2019. Our company is the lead developer and is managing construction. 

Big Stone South-to-Brookings County 345-kv line

This project is a 345-kv transmission line that will extend 70 miles from the Big Stone South Substation near Big Stone City to the Brookings County Substation near Brookings in South Dakota. Xcel Energy is the lead developer and is managing construction of this project that's estimated to cost about $225 million and be in service in 2017.

Major transmission-planning efforts

Midcontinent Independent System Operator (MISO) Transmission Expansion Plan >
CapX2020 >
Minnesota Electric Transmission Planning >

Search