Harry H. Edwards Award Winner - SH58 Ramp A Flyover Bridge, Golden, Colo.

Harry H. Edwards Award Winner - SH58 Ramp A Flyover Bridge, Golden, Colo.

This Colorado ramp flyover bridge is unique both for its use of state-of-the-art curved precast concrete girders and for the difficult, busy traffic thoroughfares over which it was built. All traffic crossings were high-volume roadways that required night and weekend erection and lane closures. The bridge currently has the longest span using constant-depth precast U-girder construction in Colorado. It employs a number of innovations and refinements of this type of construction, which demonstrates the flexibility inherent in the use of precast U-girders. The bridge’s design blends the advantages of cast-in-place concrete construction—for example, post-tensioning, torsional rigidity, and the ability to accommodate complex geometrics—with the quality of plant fabrication and cost effectiveness of using standard, predictable cross sections. By expanding the application of precast concrete to projects that involve complex, curved geometry and long-span structural design, the many advantages of using precast concrete products can be readily proven and eventually expanded to new markets. Precaster: Encon Bridge Co. LLC, Denver, Colo. Website: www.enconcolorado.net Engineer of record: CH2M Hill, Englewood, Colo. Website: www.ch2m.com Engineer of record: Summit Engineering Group, Inc., Littleton, Colo. Website: www.summit-eng-group.com/index.cfm

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