Mike O'Callaghan-Pat Tillman Memorial Bridge
Coordinates: 36 ° 0 ′ 44 " N , 114 ° 44 ′ 31" W.
| Hoover Dam bypass | ||
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| Official name | Mike O'Callaghan - Pat Tillman Memorial Bridge | |
| use | US Highway 93 , pedestrians | |
| Crossing of | Colorado River | |
| construction | Arch bridge | |
| overall length | 580 m | |
| height | 270 m | |
| building-costs | $ 114 million | |
| completion | October 14, 2010 | |
| location | ||
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The Mike O'Callaghan - Pat Tillman Memorial Bridge , also known as the Hoover Dam Bypass Bridge and Colorado River Bridge , is an arched bridge over the Colorado River in the Black Canyon that opened in 2010 . It is 580 m long and brings US Highway 93 near the Hoover Dam at an altitude of 270 m from Arizona to Nevada . When completed, the bridge was one of the longest and tallest concrete arch bridges in the Western Hemisphere , as well as the second tallest bridge in America.
history
The bridge is part of the 5.6 km long Hoover Dam Bypass - a bypass road that relieves the crest of the Hoover Dam from through traffic and also bypasses several hairpin bends on the Arizona side. The idea of a bypass road was raised in the late 1960s, but it was not until 1998-2001 that planning was started for the road that crosses the Colorado River 460 m south of the Hoover Dam. Construction of the bridges began in 2003. At a festive ceremony in 2004, the bridge was named after the former football star and US soldier Pat Tillman, who died in Afghanistan a few months earlier, and the former governor of Nevada, Mike O'Callaghan . Construction of the bridge began in February 2005. The construction work suffered a setback when the cable crane system collapsed on September 15th due to strong winds . No one was injured in the accident, but it resulted in a two-year delay in work, so the completion date was moved from 2008 to 2010. The traffic was opened on October 19, 2010 at 10:00 p.m. local time.
In 2012 the construction project received the Outstanding Civil Engineering Achievement Award from the American Society of Civil Engineers (ASCE). The bridge was already an attraction during construction. A visitor parking lot was specially created from which the footbridge of the bridge can be reached via a serpentine path.
Building
The arch of the bridge consists of two parallel prestressed concrete arches that are connected to one another by eight concrete-clad Vierendeel girders . During the cantilever construction of the arch halves, each side was anchored to a turret using cables. Each arch consists of 52 concrete segments poured on site. A total of 6900 m³ of high-strength concrete was used for the two arches. The winds of over 100 km / h and the temperatures of up to 50 ° C during the day, which only allowed the concrete to set during the night, were a particular challenge.
The pillars, up to 88 m high, made of three-meter-long precast reinforced concrete parts, which are connected in pairs at the head with a cap, stand on the arches . A total of 440 prefabricated elements were used, and when the bridge was completed, the pillars were the highest prefabricated columns in the world. They carry a steel composite superstructure consisting of a steel box girder with an in-situ concrete slab cast on top. The box girder was delivered in 35 m long 50-ton parts.
Pictures from the construction of the bridge
April 2009, the two arched ribs with the Vierendeel girders between them can be seen
Cantilever construction of the bridge arch in May 2009
Finished bridge arch in September 2009
View from Hoover Dam on the bridge on May 7, 2016
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Web links
- The Hoover Dam Bypass Project - Official website of the Hoover Dam Bypass Project
- Mike O'Callaghan-Pat Tillman Memorial Bridge - private site with many pictures from the construction of the bridge
- Mike O'Callaghan-Pat Tilman Memorial Bridge on HighestBridges.com
Individual evidence
- ↑ Las Vegas route over Hoover Dam bridge coming soon. AZ Central, August 20, 2010, accessed November 22, 2013 .
- ^ Bridge rises in the shadow of Hoover Dam. In: BBC News. August 6, 2009, accessed November 22, 2013 .
- ^ D. Goodyear, B. Klamerus, R. Turton: New Colorado River Arch Bridge at the Hoover Dam. (PDF; 5.9 MB) (No longer available online.) International Brich Conference, 2005, archived from the original on November 11, 2006 ; accessed on November 22, 2013 (English). Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ^ The Mike O'Callaghan - Pat Tillman Memorial Bridge at Hoover Dam. August 2011, accessed November 22, 2013 .
