Frost line depth in Powder River County, MT

How deep the ground freezes in Powder River County, MT

37 in. Dig to 37 in, just below the frost. Nearest NOAA station: Broadus, 7.6 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