S.D. Codified Laws § 31-4-221 (2026)
The state trunk highway system includes the following in Buffalo County: From a point on State Highway 47 near the southeast corner of section fourteen, township one hundred seven north, range seventy-two west, thence northeasterly to State Highway 34 near the northwest corner of section thirteen, township one hundred seven north, range seventy-two west.
Source: SL 1984, ch 209 , § 94.