Frost line depth in Campbell County, VA
How deep the ground freezes in Campbell County, VA
15 in. Dig to 15 in, just below the frost. Nearest NOAA station: Lynchburg Rgnl Ap, 9.8 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.