S.D. Codified Laws § 31-4-237 (2026)
The state trunk highway system includes the following in Oglala Lakota County: From a point on the Nebraska state line south of Pine Ridge near the northeast corner of section twenty-four, township thirty-five north, range forty-five west, thence north to U.S. Highway 18 in section twelve, township thirty-five north, range forty-five west.
Source: SL 1984, ch 209 , § 110; SL 2015, ch 56 (HJR 1005), eff. May 1, 2015.