Highway 81. The state trunk highway system includes the following in Hamlin County: From a point on State Highway 28 at Lake Norden near the south line of section seventeen, township one hundred thirteen north, range fifty - three west, thence northerly and east via Hayti to U.S. Highway 81 east of Hayti near the northeast corner of section twenty - five, township one hundred fourteen north, range fifty - three west. Source: SL 1984, ch 209 , § 19.
State Highway 21 from State Highway 28 to U.S
SDCL § 31-4-146 — under STATE TRUNK HIGHWAY SYSTEM.
SDCL § 31-4-146