I-96/Cascade Road Diverging Diamond Interchange

Michigan Department of Transportation | Grand Rapids, MI

Benesch served as Construction Manager for the reconstruction of the state of Michigan’s second Diverging Diamond Interchange (DDI) at Cascade Road and I-96. Comprised of multiple construction and staging areas with more than 11 sub-stages for each of the interchange’s six ramps, the project scope included 2.05 miles of pavement and hot mix asphalt removal and resurfacing, grading, drainage, concrete curb, gutter, sidewalk and ramps, signals, freeway lighting, signing, ITS, guardrail, high-tension cable barrier, bridge replacement, and pavement markings.

As part of the project, a new off-line structure was constructed to carry Cascade Road over I-96. The project also included multiple areas of simultaneous work and complex staging with more than 11 sub-stages on each of the six ramps, I-96 and Cascade Road.

Benesch provided a team of QA/QC and field inspection staff for the project to conduct reviews of field staff inspection and testing reports, site visits, and provide other engineering services when needed.

More than 20,000 vehicles a day from businesses, multiple clinics and hospitals, retirement homes, schools and private residences were impacted by the project. Construction of multiple temporary roadways was therefore required to maintain traffic and construction accessibility.

Benesch played an active role in monitoring the traffic staging and MOT plans and worked with the Michigan Department of Transportation to coordinate signage updates and communications with stakeholders to keep them informed of changing traffic patterns throughout the site.


  • 2017, Award of Excellence, Asphalt Paving Association - Michigan