The West River Water Development District is established. The district is comprised of:
(1) Haakon, Jones, and Mellette counties;
(2) That portion of Jackson County north of the White River, except Interior township and the unorganized Cedar township;
(3) That portion of Pennington County east of the Cheyenne River, except Castle Butte, Conata, Crooked Creek, Flat Butte, Imlay, and Scenic townships;
(4) The unorganized territory of the Badlands;
(5) That portion of the unorganized territory of east central Pennington County east of the Cheyenne River; and
(6) That portion of Lyman County north of the White River.