FALL 2007

ASPIRE is a quarterly magazine published by PCI in cooperation with the associations of the National Concrete Bridge Council. The editorial content focuses on the latest technology and key issues in the Concrete Bridge Industry.

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38 | ASPIRE , Fall 2007 Dry Fork Creek in Hamilton County, Ohio, is recognized as one of the state's cleanest streams, holding many species of fish that the county and local park district are interested in preserving. Crossing Dry Fork Creek was the original West Road Bridge, which was badly in need of replacement. So, in addition to the standard challenge of designing a new bridge structure that is affordable, functional, and aesthetically pleasing for the community, LJB Inc.—a Dayton, Ohio-based full-service consulting firm— also had larger responsibilities. design Considerations In its original condition, the West Road Bridge, which was built as a Works Progress Administration structure in 1939, featured a curved three-span, reinforced concrete T-beam superstructure supported on reinforced concrete cap and column piers with wall-type abutments. In evaluating the appropriate design for the new bridge, two structure types were considered—a single-span structure and a three-span structure. The evaluation also took into account the impact to nearby roads, the existing hydraulic conditions, and improved functionality. A single-span structure was considered in an attempt to avoid the creek and its wildlife as much as possible. To execute this option, though, the horizontal alignment would have to be adjusted, and the road's profile would have to be raised. This significant change was not possible due to an adjacent intersection. The option of a three-span bridge allowed for a reduced superstructure profile weSt RoaD BRIDge / HAMIlton County, oHIo EnginEE r: lJb, Inc., dayton, ohio p rimE ContraCtor: Sunesis Construction, west Chester, ohio PRESERVING A Community gateway by Mark P. Henderson, LJB, Inc. The roadway curve, hill, and adjacent intersection created a challenge for the design. The 1939 bridge was in need of replacement. 10802_Aspire_Fall07.indb 38 8/30/07 3:02:46 PM

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