Town Hall Address PO Box 76 Copper Harbor, MI 49918 United States- Keweenaw County Website https://www.granttownshipmi.org/ Zoning 906-289-4292 PO Box 76 Copper Harbor, MI 49918 United States Town Clerk 906-289-4292 PO Box 76 Copper Harbor, MI 49918 United States Water 906-289-4292 PO Box 76 Copper Harbor, MI 49918 United States Sewer 906-289-4292 PO Box 76 Copper Harbor, MI 49918 United States Tax Collector 906-289-4292 PO Box 76 Copper Harbor, MI 49918 United States Code Enforcement 906-289-4292 230 Gratiot Street Cooper Harbor, MI 49918 United States Town Hall Hours Call for hours County Keweenaw