31-4-190.State Highway 109 from U.S. Highway 12 to State Highway 15.
The state trunk highway system includes the following in Grant and Roberts counties:
From a point on U. S. Highway 12 in Big Stone City in the northwest quarter of section seventeen, township one hundred twenty-one north, range forty-six west, thence northwest to State Highway 15 east of Hartford Beach near the northwest corner of section twelve, township one hundred twenty-two north, range forty-eight west.
Source: SL 1984, ch 209, §63.