S.D. Codified Laws § 7-1-38

Beginning at the northwest corner of township two north of range twenty-six east Black Hills meridian, thence south and along the range line between ranges twenty-five and twenty-six east to the center of the main channel of White River; thence easterly and along the center of the main channel of said White River to the west line of range seventy-nine west of the fifth principal meridian; thence north and along said range line to its intersection with the township line between townships two and three north Black Hills base line; thence west and along said township line to the place of beginning.