Mike O'Callaghan–Pat Tillman Memorial Bridge, Arch bridge near Boulder City, United States.
The Mike O'Callaghan–Pat Tillman Memorial Bridge is a reinforced concrete arch bridge in Mohave County and Clark County that stretches 579 meters across the Colorado River, linking Nevada and Arizona. The roadway sits 270 meters (886 feet) above the water and offers pedestrians a direct view into the Black Canyon and down to the dam below.
Construction began in 2005 and finished in 2010, replacing a route that had run directly over the dam for decades. The new crossing relieved congestion and improved safety for traffic moving between the two states.
The crossing honors Mike O'Callaghan, who served as Nevada's governor, and Pat Tillman, a professional football player who joined the military and lost his life in Afghanistan. Their names link public service, sport, and military sacrifice in a single memorial structure.
A pedestrian walkway runs along the north side of the bridge only, reached by a short path from the Mike O'Callaghan–Pat Tillman Memorial Bridge Plaza on the Hoover Dam Access Road. Its railing gives an open view of Hoover Dam and the surrounding canyon, and the walkway ends on the far side of the bridge. High concrete barriers block the view from the roadway itself.
The bridge carries the widest concrete arch in the Western Hemisphere, with a main span of 1,060 feet (320 m) and twin arch ribs joined by steel struts. It was the first concrete-steel composite deck arch bridge built in the United States. During construction, wind-driven collapse of the cable crane system on September 15, 2005, injured no one but delayed completion from 2008 to 2010.
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