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• Measuring depth of water at Imperial Dam. Siltation is a problem at lower end of Colorado River, May 1972

  • Uploaded by: U.S. National Archives
  • License: No known copyright restrictions
  • 0 comments
  • 1 favorite
  • 10,952 views
  • Date taken: 1972-05
  • Date uploaded: 2012-05-02
  • Tags: nara:arcid=548882, usnationalarchives, environmentalprotectionagency, documerica
  • Visibility: public