SDCL § 31-4-150: State Highway 27 from U.S. Highway 12 to North Dakota.

The state trunk highway system includes the following in Day and Marshall counties:

(1) From a point on U.S. Highway 12 southeast of Andover near the southeast corner of section eighteen, township one hundred twenty-two north, range fifty-eight west, thence northerly via Langford and Britton to State Highway 10 near the northeast corner of section twenty-six, township one hundred twenty-seven north, range fifty-eight west;

(2) From a point on State Highway 10 east of Britton near the southeast corner of section twenty-three, township one hundred twenty-seven north, range fifty-seven west, thence north to the North Dakota state line near the northeast corner of section two, township one hundred twenty-eight north, range fifty-seven west.