We at CVT have ice fished lake Champlain for close to 30 years, we know the ever changing ice conditions at all times. 

The American Pulpwood Association has developed a table for judging the relative safety of ice on lakes and streams. This is just a guide.

 

 
Ice Thickness Table
Ice Thickness Permissible Load
2 inches one person on foot
3 inches group in single file
7.5 inches one car (2 tons)
8 inches light truck (2.5 tons)
10 inches truck (3.5 tons)
12 inches heavy truck (7-8 tons)
15 inches 10 tons
20 inches 25 tons

Note: This guide is based on clear, blue, hard ice on non-running waters. Slush ice is about 50 percent weaker. Clear, blue ice over running water is about 20 percent weaker.