US rivers

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Across
  1. 3. the river that is located in one of the most famous national parks in the US
  2. 7. the longest river in the US
  3. 9. the major tributary of the Mississippi River
Down
  1. 1. the tributary of the Missouri River
  2. 2. the largest river flowing into the Pacific Ocean from North America
  3. 3. the river located in Alaska
  4. 4. the source of drinking water for more than five million people
  5. 5. the river that passes through seven states and two nations
  6. 6. the river's name is in Spanish
  7. 8. the river names by a long legless animal