Frost line depth in Buffalo County, SD

How deep the ground freezes in Buffalo County, SD

47 in. Dig to 48 in, just below the frost. Nearest NOAA station: Gann Valley 4nw, 6.6 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