Missouri River

417 water rights in Cascade County, Montana, with priority dates from January 1, 1876 to June 5, 2026.

Listed in priority order. When Missouri River runs short, the rights near the top of this list are filled first and the ones at the bottom are the first asked to stop. Rights on the same stream in a neighbouring county, or on connected groundwater, can sit in the same line; the state's water commissioner or district office has the full picture. Sources are matched by name within the county, so two different streams with the same name would share this page.

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Priority date · senior to junior

  • Before 1880
  • 1880–1899
  • 1900–1919
  • 1920–1949
  • 1950–1972
  • 1973–1999
  • 2000 and later
  • No priority date