Frost line depth in Millard County, UT

How deep the ground freezes in Millard County, UT

23 in. Dig to 24 in, just below the frost. Nearest NOAA station: Black Rock, 19.7 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.

Code depth · Method