Along with being cautious every time venturing out on the ice, take extreme care on lakes with winter aeration systems. Watch for the large orange and black warning signs at high use public accesses and the required thin ice signs around open water areas.
Aeration creates areas of thin ice and open water that are extremely hazardous to people and pets. Open water areas can shift or change shapes depending on weather conditions, and leaks may develop in airlines, creating other areas of weak ice or open water. The updated list of aerated lakes and more information is available on the DNR website.
Questions concerning aeration or thin ice can be answered by calling your regional or area fisheries office or call the DNR at 888-646-6367.