Iron Range - St. Louis County - Arrowhead 345kV Transmission Line Project

Minnesota Power and American Transmission Company, LLC (ATC) propose to construct approximately 67.5 miles of transmission line from Minnesota Power's Iron Range Substation near Grand Rapids, Minnesota to Minnesota Power's St. Louis County Substation near Hermantown, Minnesota, with a connection to American Transmission Company's nearby Arrowhead Substation along portions of Itasca and St. Louis Counties. The project is needed to provide additional transmission capacity, mitigate current capacity issues, and improve electric system reliability. The proposed project includes three segments. Segment one consists of 32.7 miles of new 345 kV line along existing HVTL ROW from the Iron Range Substation to the north of the St. Louis River in St. Louis County. Segment two would replace approximately 33.3 miles of existing 230 kV HVTL with 345 kV HVTL from north of the St. Louis River in St. Louis County to Minnesota Power's St. Louis County Substation in Solway Township. Segment three consists of 1.5 miles of new 345 kV HVTL from St. Louis County Substation to the ATC Arrowhead Substation in Hermantown, Minnesota. The Iron Range - St. Louis County - Arrowhead 345kV Transmission Line Project will also require a certificate of need (CN-25-111).