Frost line depth in Presque Isle County, MI

How deep the ground freezes in Presque Isle County, MI

46 in. Dig to 46 in, just below the frost. Nearest NOAA station: Alpena 10nw, 9.9 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