Frost line depth in Lee County, IA

How deep the ground freezes in Lee County, IA

31 in. Dig to 32 in, just below the frost. Nearest NOAA station: Donnellson, 4.5 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