Frost line depth in Corson County, SD

How deep the ground freezes in Corson County, SD

49 in. Dig to 50 in, just below the frost. Nearest NOAA station: Mc Intosh 6 Se, 11.5 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