Frost line depth in Kusilvak Census Area, AK

How deep the ground freezes in Kusilvak Census Area, AK

86 in. Dig to 86 in, just below the frost. Nearest NOAA station: Bethel Ap, 112.8 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.

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