South Dakota Codified Laws 7-1-44. McCook County boundaries
Beginning at the northeast corner of township one hundred four north of range fifty–three west of the fifth principal meridian, thence west and along the first standard parallel north, to the northwest corner of township one hundred four north of range fifty–six west; thence south and along the range line between ranges fifty–six and fifty–seven west, to the southwest corner of township one hundred one north of range fifty–six west; thence east and along the base line to the southeast corner of township one hundred one north of range fifty–three west; thence north and along the range line between ranges fifty–two and fifty–three west, to the place of beginning.
Source: SL 1872-3, ch 16; SL 1879, ch 12; SL 1881, ch 46, § 1; SDC 1939, § 12.0145.