Th Hoover Dam Bypass, also called as The Mike O’Callaghan – Pat Tillman Memorial Bridge is a concrete steel arch bridge connecting the states of Colorado and Nevada. It runs accross Colorado River and was opened last October 19, 2010.
During our visit in Hoover Dam last May 2008, this bridge was still under construction. This is again another architecture in the United States considering that it is the first concrete-steel composite arch bridge built in this country.
The bridge provides a crossing of the Colorado River for U.S. Route 93, linking the U.S. states of Nevada and Arizona 1,600 feet (490 m) downstream from the Hoover Dam. It is located approximately 30 miles (48 km) southeast of Las Vegas, Nevada. The bridge is the 2nd highest in the United States, behind Royal Gorge Bridge, at 840 feet (260 m) above the Colorado River. Built as part of the Hoover Dam Bypass Project, which successfully finished within budget at a cost of $240 million, the bridge portion cost $114 million (2010 USD) more here
Its construction begun in 2003 and construction contract for the arch bridge was awarded in October 2004.
It is truly amazing how such high-tech engineering are happening nowadays. I believed the traffic in Hoover Dam is now very better with this new bridge.