Link to home page


Comment Period for Environmental Scoping Report Open Through March 14

Through March 14, 2014, the public can provide comments that will help develop the scope of the CN environmental report which will be prepared for the Great Northern Transmission Line project.

>> More news

GNTL Economic Study

Delivering Clean Energy to Minnesota

500 kV Transmission Line and Substations

Minnesota Power is proposing to build the Great Northern Transmission Line to bring clean, emission-free energy into Minnesota, meet growing energy demands and increase system reliability. The Great Northern Transmission Line, which will deliver hydropower generated by Manitoba Hydro to customers in the United States, will consist of a 500 kV transmission line from the Minnesota-Manitoba border to the Blackberry 500 kV Substation near Grand Rapids, Minnesota, as well as associated substation facilities and transmission system modifications at the Blackberry 500 kV Substation site.

At the beginning of Project planning, Minnesota Power anticipated development of two transmission lines and associated facilities - the Project and a separate 345 kV transmission line. The 345 kV transmission line, as previously described, would have run between the Blackberry Substation and the Arrowhead Substation near Hermantown, Minnesota. However, Minnesota Power determined that there was not sufficient transmission service requests to support the 345 kV transmission line. Therefore, Minnesota Power is not pursuing the 345 kV transmission line at this time.

Several priorities are driving the need for the Great Northern Transmission Line including:

  • Access to clean, affordable, reliable energy for Minnesota Power customers and the region
  • Increased industrial load growth on Minnesota's Iron Range
  • Strengthen system reliability for Minnesota Power and the region


Link to Maps page


Find answers to your questions


Join our mailing list

A project of:

Link to Minnesota Power website