Frost line depth in Oglala Lakota County, SD

How deep the ground freezes in Oglala Lakota County, SD

36 in. Dig to 36 in, just below the frost. Nearest NOAA station: Manderson 3 Ne, 7.9 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