South Dakota Codified Laws 7-1-6. Brookings County boundaries
Beginning on the boundary line between the states of South Dakota and Minnesota where the township line between townships one hundred twelve and one hundred thirteen north intersects the same, thence west and along said township line to the northwest corner of township one hundred twelve north of range fifty–two, west of the fifth principal meridian; thence south and along the range line between ranges fifty–two and fifty–three west, to the southwest corner of township one hundred nine north of range fifty–two west; thence east and along the second standard parallel north to the boundary line between the states of Minnesota and South Dakota; thence north and along said state line to the place of beginning.
Source: SL 1862, ch 16; SL 1870-1, ch 10; SL 1872-3, ch 16, § 4; SDC 1939, § 12.0107.