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Connecting power sources and end users

Minnesota Power has 8,742 miles of electric transmission and distribution lines with 164 substations. In 2009, Minnesota Power purchased a 465-mile direct current transmission line between Duluth, Minn., and Center, N.D., to transport renewable wind energy from its Bison Wind Energy Center in North Dakota.

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For Minnesota Power and ALLETE, Minnesota Power’s parent company, investing in transmission is a cornerstone of their growth strategy. Those investments include:

Great Northern Transmission Line

In April 2014, Minnesota Power applied to state and federal regulators for permits to build the 500-kilovolt Great Northern Transmission Line from the Minnesota-Manitoba border to an electric substation on the Mesabi Iron Range. The Minnesota Public Utilities Commission approved a route permit for the transmission line in April 2016, and the U.S. Department of Energy approved a Presidential Permit for the international connection at the U.S.-Canadian border in November 2016.

Construction of the transmission line, an essential component of a long-term power purchase agreement between Minnesota Power and Manitoba Hydro, began in January 2017. The line is expected to be in service in 2020.

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American Transmission Co.

ALLETE began investing in ATC in 2006 and the company’s investment in the Wisconsin-based public utility now represents an 8 percent ownership interest. ATC is the first multistate, transmission-only utility in the United States. It owns and operates transmission systems in portions of Minnesota, Wisconsin, Michigan and Illinois.

CapX2020

Minnesota Power is a participant in the CapX2020 initiative, a collaboration consisting of Minnesota’s largest transmission owners as well as electric cooperatives, municipals and investor-owned utilities.

Minnesota Power participated in two CapX2020 transmission line construction projects: the new 345-kilovolt Monticello-Fargo line, and a new 230-kilovolt line between Bemidji and the Boswell Energy Center near Grand Rapids, Minn. Our participation with CapX continues with operation and maintenance of the lines.

The Bemidji-Grand Rapids line was completed in September 2012, and the last segment of the Monticello-Fargo line was energized in April 2015.


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