S.D. Codified Laws § 7-1-25
Beginning at the southeast corner of township one hundred seventeen north of range sixty-six, west of the fifth principal meridian, thence north and along the range line between ranges sixty-five and sixty-six west, to the northeast corner of township one hundred twenty north of range sixty-six west; thence west and along the township line between townships one hundred twenty and one hundred twenty-one north, to the northwest corner of township one hundred twenty north of range seventy-two west; thence south and along the range line between ranges seventy-two and seventy-three to the southwest corner of township one hundred seventeen north of range seventy-two west; thence east and along the township line between townships one hundred sixteen and one hundred seventeen north, to the place of beginning.
SDCL 7-1-25