Great River Energy finishes Motley Area transmission line

The company built about 16.5 miles of new 115-kV overhead transmission line

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Great River Energy on Aug. 23 told the Minnesota Public Utilities Commission – on behalf of itself and Minnesota Power – that construction of the Motley Area 115-kV Project was completed this month, and that energization is scheduled for Aug. 28, with minimal load, and Aug. 31, with full load.

As noted on Great River Energy's website, the company built about 16.5 miles of new 115-kV overhead transmission line in southern Cass County, eastern Todd County, and northern Morrison County to ensure the reliability of electric service to the members of Crow Wing Power.

As TransmissionHub reported, the commission in March 2016 granted the companies a route permit for the Motley Area HVTL Project. Minnesota Power told the commission in October 2016, that its portion of the project includes a 0.9-mile segment of new 115-kV high voltage transmission line and an expansion of its existing Dog Lake substation.

According to the commission’s March 23, 2016, order, Great River Energy and Minnesota Power in March 2015 filed applications for a certificate of need and a route permit to build about 15.5 miles to 16.5 miles of 115-kV transmission line and associated facilities in the Motley area.

According to the companies, the Motley Area 115 kV Transmission Line Project was needed to address power system overload issues in the area and to provide electric service to Minnesota Pipe Line Company’s proposed Fish Trap pumping station.

Among other things, the commission also said that project construction will involve several steps: building a new single-circuit 115-kV transmission line between Minnesota Power’s “24 Line” transmission line and a new Crow Wing Power Fish Trap Lake substation; converting the 34.5-kV Motley substation to 115 kV and adding a three-way switch; building the Fish Trap Lake substation to serve the new Fish Trap pumping station; adding breakers to Minnesota Power’s existing Dog Lake substation using a more reliable ring bus design and building a one-half-mile transmission line between the substation and the “24 Line” 115-kV line; and installing a three-way switch to allow for the future construction of a Crow Wing Power substation near Shamineau Lake.

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