Frost line depth in Des Moines County, IA

How deep the ground freezes in Des Moines County, IA

31 in. Dig to 31 in, just below the frost. Nearest NOAA station: Gladstone Dam 18, 8.8 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