Frost line depth in North Slope Borough, AK

How deep the ground freezes in North Slope Borough, AK

107 in. Dig to 107 in, just below the frost. Nearest NOAA station: Nuiqsut Ap, 79 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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