Related Clues:

• River spanned by the Bagnell Dam
• Largest tributary of the Missouri
• Siouan tongue
• Western Amerind
• River named for an Indian tribe
• Siouan
• Platte River people
• Sioux speaker
• Language from which 'Nebraska' comes
• Some Sooners
• They lived along the Missouri
• Speaker of Siouan
• Iowa cousin
• Nebraska natives
• Missouri tributary