South Dakota Codified Laws
Chapter 19 - River Basin Natural Resource Districts
Section 46A-19-11 - White River and Niobrara River district.

46A-19-11. White River and Niobrara River district.
The White River and Niobrara River Basin Natural Resource District is hereby established. The district shall include the portions of Bennett, Fall River, Gregory, Jackson, Jones, Lyman, Mellette, Oglala Lakota, Pennington, Todd, and Tripp counties located in the White River hydrologic basin and the Niobrara River hydrologic basin.

Source: SL 2015, ch 227, ยง11.