MDOT: Incorrect concrete mix used for portion of I-75 construction project

Crews will need to remove, replace pavement in 2020

OAKLAND COUNTY, Mich. – Contractor paving crews will have to remove and replace some of the new I-75 concrete in Oakland County because an inspection revealed the incorrect concrete mix was used on portions of the new pavement.

The Michigan Department of Transportation announced Tuesday that inspection teams working on Segment 2 of the I-75 modernization project in Oakland County found the incorrect concrete mix was used recently on portions of the project, including the left two lanes of northbound I-75 from 13 1/2 Mile to 14 Mile roads, and the shoulders on the exit ramps to Big Beaver and Rochester roads.


  • MDOT and the project contractor determined the incorrect mix was used on small portions of Segment 2 of the I-75 modernization project.
  • The areas to be replaced include the left two lanes on northbound I-75 from 13 1/2 Mile to 14 Mile roads, and the shoulders on the exit ramps to Big Beaver and Rochester roads.
  • Some shoulder replacement has taken place; freeway replacement will occur next year.

MDOT said that due to this discovery, contractor paving crews will remove and replace those affected portions before all paving is completed in late 2020. Currently, both directions of I-75 are sharing the southbound side of the freeway, separated by a temporary concrete barrier between 13 Mile Road and Coolidge Highway. Two lanes are open in each direction.

“This is inspectors doing their jobs,” said MDOT Metro Region Engineer Kimberly Avery. “The pavement designated for replacement is safe for drivers to use, but the long-term durability is compromised and the reason for our actions.”

MDOT also said contractor crews began removing the shoulder on a portion of the Rochester Road ramp this past weekend and have already replaced the pavement. Replacement of the left lanes from 13 1/2 Mile to 14 Mile roads and the remainder of the shoulder pavement on the ramps will be delayed until next year during the final year of the overall project.


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