Ralph L. Wadsworth Construction was announced as one of nine national bridge building awards.
SKOKIE, Ill.--Nine winners have been named in Portland Cement Association’s (PCA) Eleventh Biennial Bridge Awards Competition. The competition, instituted in 1988, recognizes excellence in design and construction of concrete bridges. Roads and Bridges magazine was a co-sponsor of this year’s competition.
Big Cottonwood Canyon Bridge – Located in Salt Lake County, Utah, the Big Cottonwood Canyon Bridge provides access to a private development in the foothills of the Wasatch Mountains. The site has steep grades, a conservation easement, and is adjacent to protected property. To meet this challenge, the engineer designed two bridges on switchback curves. The lower bridge provides an aesthetic entrance to the development, is sensitive to the environment, and satisfies the concerns of county officials. The bridge is 450 feet long with a switchback radius of only 80 feet and a 12% grade. A cast-in-place concrete triple cell box girder with five 90-foot spans supports the integral concrete deck. The girders are supported by single column bents and integral caps on spread footings. The bridge is designed to resist very high seismic activity with a peak ground acceleration of 176% of gravity.
Project Principals: Wasatch Pacific, LLC owner; Michael Baker Jr. Inc., engineer; Ralph L. Wadsworth Construction, contractor; and Harper Ready Mix, concrete supplier.
Jury Comments: This is an excellent design solution to a highly challenging project. This bridge literally fits the site in which it has been placed. The project is an excellent example of the versatility of cast-in-place concrete.