Frost line depth in Montgomery County, TN

How deep the ground freezes in Montgomery County, TN

14 in. Dig to 15 in, just below the frost. Nearest NOAA station: Clarksville No.2, 2.5 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.

Code depth · Snow