S.D. Codified Laws § 31-4-163 (2026)
The state trunk highway system includes the following in Gregory County: From a point on the Nebraska state line near the southeast corner of section thirty-three, township ninety-five north, range sixty-eight west, thence northwesterly to near the northwest corner of section thirty-three, township ninety-five north, range sixty-eight west.
Source: SL 1984, ch 209 , § 36.