Frost line depth in Lawrence County, AR
How deep the ground freezes in Lawrence County, AR
14 in. Dig to 14 in, just below the frost. Nearest NOAA station: Alicia 2nne, 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.