Frost line depth in Hoonah-Angoon Census Area, AK

How deep the ground freezes in Hoonah-Angoon Census Area, AK

28 in. Dig to 28 in, just below the frost. Nearest NOAA station: Glacier Bay, 3.7 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