Frost line depth in Keweenaw County, MI

How deep the ground freezes in Keweenaw County, MI

54 in. Dig to 55 in, just below the frost. Nearest NOAA station: Hancock Houghton Co Ap, 15.2 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