Frost line depth in Blue Earth County, MN

How deep the ground freezes in Blue Earth County, MN

50 in. Dig to 50 in, just below the frost. Nearest NOAA station: Mankato, 8.6 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