Construction of a 0.9-mile segment of new 115-kV high voltage transmission line (HVTL) – named Minnesota Power 155 Line – is expected to begin in November, Minnesota Power told the Minnesota Public Utilities Commission on Oct. 11.
As noted in the filing, the commission in March granted Great River Energy and Minnesota Power a route permit for the Motley Area HVTL Project. Minnesota Power noted that its portion of the project includes a 0.9-mile segment of new 115-kV high voltage transmission line (HVTL) and an expansion of its existing Dog Lake substation.
According to the commission’s March 23 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. The companies stated that 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. The PUC also noted that the companies anticipate that construction would begin in fall 2016, and that the line would be energized in summer 2017.
Among other things, the commission 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.