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Putnam Street Bridge Replacement
Marietta, Ohio
The Putnam Street Bridge replacement will carry traffic across the Muskingum River in Marietta, Ohio. It is the first cast-in-place segmental bridge in the state of Ohio. Finley McNary redesigned the bridge as a Value Engineering Cost Proposal (VECP) for the Kokosing Construction Company.
The bridge was originally designed as a precast dual box structure. The redesigned structure consists of a single cell, full width cast-in-place box girder with two cantilevers and three spans measuring 55.5, 98.0 and 55.5 meters. The wide box cross-section was designed with a transverse top deck strut to accommodate a deck width of 21.29 meters. The project was cast-in-place with form travelers using the balanced cantilever erection method, with Finley McNary also providing construction engineering.
Construction of the substructure began in the spring of 1998. The final mid-span closure was jacked apart and cast at the end of May 2000. The approaches, sidewalks, and barriers were completed and the bridge opened to traffic in June of 2000. The town of Marietta is extremely excited for the opening of the new bridge which provides a vital passage across the river.
The previous Putnam Street Bridge, which was a steel truss bridge, was demolished in order to complete the new structure.
The structure was completed on schedule in September of 2000. At the dedication ceremony, the owner remarked that not only had the redesign saved money, but also made the structure even more aesthetically pleasing than the original design. This resulted in a ‘win-win’ solution for everyone involved, including the owner, the citizens of Marietta, and the contractor.
Finley McNary provided the VECP Redesign of superstructure and substructure, integrated segment drawings, geometrical control of casting, erection, and procedural manuals, casting curves, analysis of construction loading, design of erection equipment and falsework, post-tensioning calculations, and on and off-site technical assistance.
Owner:
Ohio Department of Transportation
Washington County, Ohio
Client:
Kokosing Construction Company, Inc.
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