South Dakota Codified Laws 31-4-151. State Highway 28 from U.S. Highway 281 to Minnesota
The state trunk highway system includes the following in Spink, Clark, Hamlin, and Deuel counties:
(1) From a point on U.S. Highway 281 south of Redfield near the southwest corner of section thirty–five, township one hundred fourteen north, range sixty–four west, thence easterly via Willow Lake and Bryant to U.S. Highway 81 south of Watertown near the southeast corner of section thirteen, township one hundred thirteen north, range fifty–three west;
(2) From a point on U.S. Highway 81 south of Watertown near the northwest corner of section eighteen, township one hundred thirteen north, range fifty–two west, thence easterly via Estelline and Toronto to the Minnesota state line east of the northeast corner of section twenty–eight, township one hundred thirteen north, range forty–seven west.
Source: SL 1984, ch 209, § 24.