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Arapaho Road Bridge, 2007 OCEA
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The 1,575 ft. long Arapaho Road Bridge is the signature piece of a two-mile extension of Arapaho Road. It carries four lanes of traffic and is a model of innovation for standard pre-cast concrete and materials. The bridge’s deck was constructed with pre-cast/pre-stressed U-beams and deck panels and is suspended by a series of steel rope hangers which attach to the arches and cast-in-place concrete diaphragms. The design is also notable for its use of round pipe for the arch rib, which was painted blue to tie the bridge into the town of Addison’s most famous public art piece - a sculpture called “Blueprint of Addison.” The use of round pipe was not only stylistically valuable, it also provides a high strength arch with good capacity against buckling and eliminates the need for lateral bracing.

 

Inventive methods of arch construction were utilized to mitigate traffic disruptions, which included construction of a temporary bent in the median of the road to allow the two free-standing 85-ft. long U-beam sections to be set in place. The steel pipes were fabricated using induction bending and the arch pieces were erected in two pieces overnight prior to being set and spliced together. Then, once the diaphragms and deck were cast, hangers were installed and stressed, lifting the bridge off of its temporary bent. Apart from occasional overnight road closures, traffic on Midway Road continued to flow unimpeded throughout construction of the main span. The cost of constructing the bridge and its lighting system was less than $6 million -  to the satisfaction of Addison’s budget. Completed in July of 2004 and open to traffic in January of 2006, the Arapaho Road relieves an estimated 11,000 vehicles per day from Belt Line Road without any additional congestion at the Midway Road intersection. The aesthetic theme of Arapaho Road Bridge unites the two areas of Addison, and creates a striking gateway into the town’s restaurant district.


Owner: 
City of Addison, Texas
Engineer/Contractor: 
URS Corporation

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