General

U.S Geological Survey
www.usgs.gov

Michigan

Michigan Department of Environmental Quality
www.michigan.gov/deq

Michigan Department of Natural Resources
www.michigan.gov/dnr

Minnesota

Mining Minnesota
www.miningminnesota.com

Iron Mining Association
www.taconite.org

Iron Range Resources
www.irrrb.org

Minnesota Geological Survey
www.geo.umn.edu/mgs

Minnesota Department of Natural Resources
www.dnr.state.mn.us

Wisconsin

Wisconsin Department of Natural Resources
www.dnr.state.wi.us

Wisconsin Geological and Natural History Survey
www.uwex.edu/wgnhs