Mining Companies Mining Companies Search | Advanced Search | New Members | Coupons and Discounts | All Categories Sort alphabetically by... Name City MiningMinnesota _ PO Box 16666Duluth, MN 55816 (218) 393-2301 Learn More | Visit Site PolyMet Mining _ P.O. Box 475Hoyt Lakes, MN 55750 (218) 471-2150 Learn More | Visit Site Iron Mining Association of Minnesota _ 324 W Superior St. #502Duluth, MN 55802 1725Kelsey Johnson (218) 722-7724 Learn More | Visit Site | View on Google Maps Twin Metals Minnesota, LLC _ 380 St. Peter Street, Suite 705St. Paul, MN 55119 (651) 842-6800 Learn More | Visit Site If your business isn't here, contact us today to get listed!