Mill Creek Expressway Phase 5A (HAM-75-3.84) Design-Build
Cincinnati, Ohio
American Structurepoint is lead design engineer for Walsh Construction Company on this $86 million Design/Build construction project in Hamilton County, Ohio. The project is along I-75 from Hopple Street to Mitchell Avenue and along I-74 to the interchange with I-75. The scope of work includes adding both a northbound and southbound I-75 thru-lane, replacing the I-75 mainline pavement south of Ludlow Avenue, resurfacing the pavement north of Ludlow Avenue, and separating the combined sewer system within the ODOT right-of-way. This work includes two conduits constructed under the existing railroad tracks by jack and bore methods. Work also includes adding a second exit lane on the southbound exit to Hopple Street and the reconstruction of the I-74 EB Hopple Street ramps to I-75 to improve the ramp connectivity and level of service (LOS).
This project also includes the rehabilitation and replacement of several structures. The eastbound I-74 structures over S. Beekman Street, North Beekman Street and Elmore Street will have their existing decks removed and replaced. The structure over Spring Grove, Mill Creek, and the CSX/NS railroad tracks will be habilitated, including a new deck. The existing structure on the I-74 EB to I-75 NB ramp over I-75 mainline is to be removed and replaced with a new multi-span, curved steel girder structure. Both the I-75 mainline 3-span structures over the ramp from Hopple Street to WB I-74 are to be replaced with a new single-span concrete beam structure.
Due to the widening I-75, it is necessary to construct five new retaining walls along the corridor. The three southbound walls are to eliminate any impacts to the adjacent CSX/NS tracks. The two northbound walls will eliminate impacts on the adjacent local road (Streng Street) and minimize impacts to Mount Storm Park.
New highway lighting, ITS, and traffic control is also included within the project corridor. Maintenance-of-traffic is critical in the design and construction of this project. Traffic is to be maintained at all times during construction in this heavily traveled corridor in Cincinnati.
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