Frost line depth in Wrangell City and Borough, AK

How deep the ground freezes in Wrangell City and Borough, AK

18 in. Dig to 18 in, just below the frost. Nearest NOAA station: Wrangell Ap, 24.5 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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