Frost line depth in Asotin County, WA

How deep the ground freezes in Asotin County, WA

14 in. Dig to 14 in, just below the frost. Nearest NOAA station: Lewiston Nez Perce Co Ap, 16.7 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 · Snow