Frost line depth in Grand Traverse County, MI

How deep the ground freezes in Grand Traverse County, MI

36 in. Dig to 36 in, just below the frost. Nearest NOAA station: Traverse City Cherry Cptl Ap, 2.1 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