SIOUX FALLS, S.D. (KELO)–A member of the Cheyenne River Sioux Tribe is the first Native American to serve as the USDA’s … board of the Northwest Area Foundation and serving on the Tribal Council for …SIOUX FALLS, S.D. (KELO)–A member of the Cheyenne River Sioux Tribe is the first Native American to serve as the USDA’s … board of the Northwest Area Foundation and serving on the Tribal Council for …