MACOMB, Mich. – Macomb County is beginning a major underground infrastructure project.
The project was initiated to prevent more sinkholes and the collapse of a major sewer system carrying sewage for over half a million county residents.
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The project will rehabilitate a 1.5-mile-long section of the 15 Mile interceptor.
The 15 Mile Interceptor is part of the large Macomb Interceptor Drain Drainage District, serving residents in 11 of Macomb County’s communities.
The interceptor has been severely degraded by corrosive sewer gas.
The project will include the lining of the 5-foot-diameter pipe along 15 Mile from two blocks east of Gratiot Avenue to just west of Groesbeck Highway in Clinton Township.
Steel-ribbed PVC spiral-wound liner is being installed along the inside wall of the pipe.
The project will cost $11.5 million and is scheduled to be completed by January 2027. The product is expected to last at least 50 years.
There will not be a sewer rate increase, county officials said.
“Underground infrastructure may seem out of sight, but it can’t be out of mind, and it certainly isn’t in our department,” said Macomb County Public Works Commissioner Candice S. Miller.
For more information, Miller has created an explainer video. You can view it here.