South Dakota Codified Laws
Chapter 19 - River Basin Natural Resource Districts
Section 46A-19-7 - Upper Missouri River Trench district.

46A-19-7. Upper Missouri River Trench district.
The Upper Missouri River Trench Basin Natural Resource District is hereby established. The district shall include the portions of Campbell, Corson, Dewey, Edmunds, Faulk, Haakon, Hughes, Hyde, McPherson, Potter, Stanley, Sully, Walworth, and Ziebach counties located in the Upper Missouri River Trench hydrologic basin.

Source: SL 2015, ch 227, ยง7.