Montana-Dakota Utilities Co., a division of MDU Resources Group Inc., on July 18 filed an application with the North Dakota Public Service Commission (PSC) for a certificate of public convenience and necessity to build and operate about nine miles of 115-kV electric transmission line and associated interconnection facilities.
The new line is required to enhance the electric service reliability and Montana-Dakota is fit, willing and able to build and operate its portion of the project, the company said.
The line would be located in Dickey County in North Dakota, and Brown and McPherson counties in South Dakota, the company said.
The line would interconnect the company’s existing Ellendale substation in Ellendale, N.D., to a new substation in Leola, S.D., the company said, adding that the new Leola substation would interconnect to Montana-Dakota’s existing sub-transmission system.
The project is needed to provide another power source to the existing transmission system around Leola, the company said, adding that the current transmission system supporting that area consists of very long transmission lines between power sources.
Those lines expose Montana-Dakota’s customers to more frequent and extended outages due to lightning strikes or storms. The company added that power quality is also a concern under some system configurations, limiting operation flexibility.
The addition of the line would provide a new power source into the area and provide additional support on the integrated system, the company said.
Among other things, the company said that it requests that the commission give notice of opportunity to request a hearing to interested parties and, if no hearing is requested within 20 days, to waive the hearing.