News Posted July 23, 2013 Share Posted July 23, 2013 A new online tool released by the Department of the Interior this week allows users to select any major stream and trace it up to its sources or down to its watershed. One map exported from the tool highlights all the major tributaries that feed into the Mississippi River, illustrating the river's huge catchment area of approximately 1.15 million square miles.More... Link to comment Share on other sites More sharing options...
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