The state trunk highway system includes the following in Hanson and McCook counties:
From a point on Interstate Highway 90 north of Alexandria north of the southeast corner of section four, township one hundred two north, range fifty-eight west, thence southeasterly via Alexandria, Emery, and Bridgewater to State Highway 42 in Bridgewater west of the southeast corner of section thirteen, township one hundred one north, range fifty-six west.
SDCL 31-4-225