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.