Putnam Street Bridge Replacement

The Putnam Street Bridge replace-ment carries traffic across the Muskingum River in Marietta, 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.

The Putnam Street Bridge replacement is the first cast-in-place segmental bridge in the state of Ohio.

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 was opened to traffic in June of 2000.

The previous Putnam Street Bridge, which was a steel truss bridge, was demolished in order to complete the new structure.