SDCL § 31-4-208: State Highway 324 from Interstate Highway 29 to State Highway 13.

The state trunk highway system includes the following in Brookings County:

From a point on Interstate Highway 29 on the north line of section nineteen, township one hundred nine north, range forty-nine west, thence east to State Highway 13 west of Elkton near the northeast corner of section twenty-one, township one hundred nine north, range forty-eight west.