Northern States Power Company and Great River Energy are proposing to build about 8.5 miles of new 115-kV single circuit transmission line facilities and to change the operating voltage of 2.9 miles of an existing 69-kV line to 115 kV.
All of the proposed work will take place in Carver and Scott counties, near the cities of Chaska and Carver, through Laketown, Dahlgren and Jackson townships, in Minnesota, according to the application for a certificate of need for the upgrade of the Southwest Twin Cities (SWTC) Chaska area transmission line filed May 15 with the state Public Utilities Commission. The project will also include modifications at certain associated facilities, including the existing Augusta, Victoria, West Creek, Chaska and Scott County substations.
“By ‘change’ we mean that, in most all cases, we will remove the poles and wires that are there and replace them with new and larger poles and wires,” the companies said.
The companies will need to obtain new right-of-way to build new poles and wires in relation to the new 115-kV transmission facilities.
The required right-of-way will depend on the ultimate route selected, the companies said, adding that in the route permit proceeding, they will propose to locate 6.1 miles of the 115-kV facilities within the existing 50-foot right-of-way of the existing 69-kV line. For the 2.4 miles of the new 115-kV facilities, the companies propose a new 75-foot-wide right-of-way.
The southwest region of the Twin Cities has recently experienced growth and development, including a new data center in the city of Chaska, the companies said, adding that they have evaluated different ways to provide electrical service to the new data center and additional transmission support in the area. “We believe that the [115-kV] transmission facilities proposed in this application are necessary to serve the electrical needs of this area,” the companies said.
It is estimated that the processing and approval of the application, along with the route permit application, will be complete in the spring 2013. If approved, project construction will begin soon after permits are obtained with an in-service date of spring 2014.
The companies also said the project is estimated to cost about $18.2m.
Northern States Power is an Xcel Energy (NYSE:XEL) company. Great River Energy is a Touchstone Energy Cooperative.