Frost line depth in Okanogan County, WA

How deep the ground freezes in Okanogan County, WA

24 in. Dig to 24 in, just below the frost. Nearest NOAA station: Omak Ap, 12 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