Frost line depth in Kodiak Island Borough, AK

How deep the ground freezes in Kodiak Island Borough, AK

23 in. Dig to 23 in, just below the frost. Nearest NOAA station: Kodiak Ap, 53 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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