Frost line depth in Kidder County, ND
How deep the ground freezes in Kidder County, ND
60 in. Dig to 61 in, just below the frost. Nearest NOAA station: Steele 4n, 10.7 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.