Transportation JEREMIAH MORROW BRIDGE

INSIDE THE PROJECT

The Jeremiah Morrow Bridge sits 239-feet above the Little Miami River and spans 2,252-feet in length. Kokosing was awarded an $88.1 million contract to replace the existing steel deck truss structures with cast-in-place, balanced cantilevered concrete segmental box girder bridges. The six-span superstructures sit on hollow-box monolithic piers and consist of single-cell boxes varying in height from 10-feet to 19-feet. Kokosing’s custom-built forms advanced the piers while a custom-modified form-traveler system serviced the superstructure.

This challenging project was driven by the linear schedule created from concrete strength and post-tensioning requirements. The first bridge was constructed between the existing I-71 northbound and southbound structures, allowing eight feet of clearance on each side. Access to the work was limited to a stair tower at each pier. The superstructure required a “balanced” installation by pouring the cantilever in 16-foot segments alternating each direction, casting a total of 244 segments between the two structures. The six-year project duration involved the installation of 49,000-cubic-yards of concrete, ten million pounds of reinforcing steel, and 3.2-million-feet of post-tensioning strand.

The project was extremely successful due to the hard work and partnering between Kokosing, ODOT, and their consultants.