S.D. Codified Laws § 31-4-215 (2026)
The state trunk highway system includes the following in McPherson County: From a point on State Highway 10 west of Leola south of the northeast corner of section seven, township one hundred twenty-six north, range sixty-nine west, thence north to Long Lake near the southeast corner of section thirty-one, township one hundred twenty-eight north, range sixty-nine west.
Source: SL 1984, ch 209 , § 88.