<P> The Mike O'Callaghan -- Pat Tillman Memorial Bridge is an arch bridge in the United States that spans the Colorado River between the states of Arizona and Nevada . The bridge is located within the Lake Mead National Recreation Area approximately 30 miles ( 48 km ) southeast of Las Vegas , and carries U.S. Route 93 over the Colorado River . Opened in 2010 , it was the key component of the Hoover Dam Bypass project , which rerouted US 93 from its previous routing along the top of Hoover Dam and removed several hairpin turns and blind curves from the route . It is jointly named for Mike O'Callaghan , Governor of Nevada from 1971 -- 1979 , and Pat Tillman , an American football player who left his career with the Arizona Cardinals to enlist in the United States Army and was later killed in Afghanistan by friendly fire . </P>
when was the bridge over the hoover dam built
2010