The state trunk highway system includes the following in Yankton County: From State Highway 52 near Gavins Point Dam in the northwest quarter of section seventeen, township ninety - three north, range fifty - six west, thence north to State Highway 50 northwest of Yankton near the northeast corner of section six, township ninety - three north, range fifty - six west. Source: SL 1984, ch 209 , § 72.