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        Lake Mead At Historic Low Levels As Drought Continues In Western US | Human Impact on the Physical Environment | Geography

        LAKE MEAD, NRA, NV - JULY 14: The Mike O'Callaghan-Pat Tillman Memorial Bridge part of the Hoover Dam Bypass is shown above the Hoover Powerplant and Colorado River at the Hoover Dam on July 14, 2014 in the Lake Mead National Recreation Area, Nevada. Last week, North America's largest man-made reservoir dropped below 1,082 feet above sea level, the lowest it's been since the Hoover Dam was built in the 1930s.

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