Frost line depth in Iron County, MI

How deep the ground freezes in Iron County, MI

64 in. Dig to 65 in, just below the frost. Nearest NOAA station: Amasa 1w, 6.1 mi.

Your building department sets the legal frost line depth (IRC Table R301.2(1)); footings must go below it (R403.1.4.1). Call them before you dig.

Code depth · Snow