S.D. Codified Laws § 7-1-29
Beginning at the northeast corner of township one hundred fifteen north of range fifty-one, west of the fifth principal meridian, thence west and along the township line between townships one hundred fifteen and one hundred sixteen north, to the northwest corner of township one hundred fifteen north of range fifty-five west; thence south and along the range line between ranges fifty-five and fifty-six west to the southwest corner of township one hundred thirteen north of range fifty-five west; thence east and along the third standard parallel north, to the southeast corner of township one hundred thirteen north of range fifty-one west; thence north and along the range line between ranges fifty and fifty-one west, to the place of beginning.
SDCL 7-1-29