Frost line depth in Lincoln County, MT

How deep the ground freezes in Lincoln County, MT

27 in. Dig to 27 in, just below the frost. Nearest NOAA station: Libby 1 Ne Rs, 10.9 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.

Code depth · Snow