Frost line depth in Morris County, KS
How deep the ground freezes in Morris County, KS
22 in. Dig to 22 in, just below the frost. Nearest NOAA station: Council Grove Lake, 7.7 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.