Lewis and Clark County water rights

18,537 rights recorded with the state of Montana · 231 without a priority date

Open Lewis and Clark County on the map
Groundwater
14,168
Surface water
4,369

Streams and named sources

Each source page lists its rights in priority order, which is the order water is shared out in a shortage.

Every right in the county, most senior first

Priority date · senior to junior

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