Frost line depth in Monroe County, IN

How deep the ground freezes in Monroe County, IN

23 in. Dig to 23 in, just below the frost. Nearest NOAA station: Bloomington Indiana Univ, 0.9 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.