A member of the U.S. Coast Guard walks Friday on the deck of a barge used to place navigational buoys, seen at right, along the Mississippi River to aid vessels as they travel up and down the waterway.
A Coast Guard boat patrols in the foreground as a barge makes its way down the Mississippi River Friday in St. Louis.
A barge powers its way up the Mississippi River Friday, in St. Louis.
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The lengthy drought has parched the nation's two largest rivers, leaving water levels dangerously low. And long-range forecasts call for the drought to extend into spring.