Great Northern Transmission Line

The Great Northern Transmission Line is the southern portion of the greater Minnesota Power and Manitoba Hydro transmission project. The northern half of the project, sponsored by Manitoba Hydro, will reach from Winnipeg to the Canadian-Minnesota Border.  The line will then run from this interconnect at the border to the Blackberry substation. The total length of the project is expected to be approximately 220 miles, all of which will be operated at 500-kV. The new transmission line is being proposed in order to strengthen the electric grid, enhance regional reliability and promote a greater exchange of sustainable energy.  Construction of the project began in January 2017 with an in-service date of 2020. On July 2nd, 2014, the Draft EIS Scoping Document was submitted to the Minnesota Public Utility Commission. The Draft EIS is expected to be complete on February 2nd, 2015.

Project Sponsor Line Miles Voltage (kV) From State To State Year in Service
Minnesota Power 220 500 MB MN 2020
Estimated Costs ($M) Voltage Type Project Status Project Group Origin Point Destination Point
710 Under Construction MMTP Manitoba-Minnesota Border Blackberry
Interstate Build Start NERC ISO/RTO Country Project Partners
2017 MRO MISO US Minnesota Power and Manitoba Hydro