In 2010, the state of Ohio passed legislation to allow the Ohio Department of Transportation (ODOT) to deliver the I-71/I-670 Interchange as a best value design-build project, allowing the largest highway project in Central Ohio history to begin two and a half years earlier and save $40 million dollars when compared to traditional project delivery methods. The project reconstructed approximately one mile of I-71 and one and a half miles of I-670 Eastbound along with 18 ramps within the project area. Twenty new bridges — including two new flyover bridges — two reconstructed bridges, twenty-six retaining walls, two new local urban avenues, a realigned 60” storm sewer and a 54” micro-tunnel represent the major construction elements.
Owner: Ohio Department of Transportation
Design-Builder, Estimator: Kokosing Construction Company, Inc.
Engineers: CH2M HILL, E.L. Robinson Engineering
Specialty Contractor: Super Excavators, Inc.
Specialty Consultant: Delcan Corporation