For more information on ice safety contact the MN DNR and ask for our free ice safety publications, which include the brochures, "Danger, Thin Ice" and "Hypothermia the Cold Facts" and the wallet-sized reference card and 11X14 posters titled, "Minimum Recommended Ice Thicknesses." Metro (651) 296-6157 or toll free outside the metro area 1-888-646-6367 or email the Information Center at info@dnr.state.mn.us.

http://www.dnr.state.mn.us/safety/ice/index.html