Frost line depth in Pierce County, ND

How deep the ground freezes in Pierce County, ND

71 in. Dig to 72 in, just below the frost. Nearest NOAA station: Rugby, 8.1 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