Frost line depth in Copper River Census Area, AK

How deep the ground freezes in Copper River Census Area, AK

92 in. Dig to 93 in, just below the frost. Nearest NOAA station: Silver Lake, 36.8 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