<p>Sewer and water line infrastructure guides specific to Duluth and the Twin Ports.</p>
Most residential sewer lines are buried 2 to 8 feet deep. In Duluth and Superior, laterals typically run 5 to 8 feet down so they sit below frost. Duluth requires insulation on any sanitary sewer service with 6 feet of cover or less, and Wisconsin sets a hard 42 inch minimum for building sewers in […]