The Mike O’Callaghan – Pat Tillman Memorial Bridge bypass bridge around Hoover Dam between Arizona and Nevada, USA.

The Mike O’Callaghan – Pat Tillman Memorial Bridge, the key component to the Hoover Dam Bypass project, was the first concrete-steel composite arch bridge built in the United States, and it incorporates the widest concrete arch in the Western Hemisphere. Opened on October 19, 2010, this four-lane highway bridge provides a crossing of the Colorado River for U.S. Route 93, linking Nevada with Arizona about 1,600 feet (about 500 meters) downstream from the Hoover Dam. This bridge is located about 30 miles (48 kilometers) southeast of Las Vegas, Nevada. At 840 feet (260 meters) above the Colorado River, this bridge is the second-highest in the United States, following the Royal Gorge Bridge.
http://en.wikipedia.org/wiki/Hoover_Dam_Bypass

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