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October 23, 2023 8:00 AM


• Dequindre Road south of Avon Road to Hamlin Road will be closed from November 6 through mid-December 2024
• Improvements include installation of new, re-routed 96-inch water transmission main along Rochester Hills and Shelby Township border
• Avon Road and new roundabout at the intersection of 23 Mile and Dequindre Roads now open to through traffic

DETROIT – The Great Lakes Water Authority (GLWA) and the Road Commission for Oakland County (RCOC) are beginning work on the next phase of significant infrastructure improvements in the area of Dequindre Road between Avon Road and Hamlin Road along the Rochester Hills and Shelby Township border as part of the 96-Inch Water Transmission Main Relocation Project.

This phase of the project, which will see Dequindre Road from south of Avon to Hamlin Road closed to through traffic, begins on Monday, November 6 and is expected to be completed by mid-December 2024. During the closure, the detour route for through traffic will be Avon Road to John R Road, south to Hamlin Road, east to Dequindre Road, and vice versa (see map).

The 96-inch water transmission main relocation project will enhance resiliency of the water transmission system that serves multiple communities throughout Oakland, Macomb and Lapeer Counties. In addition, the project will improve access for operations and maintenance and improve traffic flow and pedestrian safety at critical intersections. There is no planned disruption to water services to GLWA’s member partner communities during this time.

“We are thrilled with the progress we continue to make and proud of the collaboration across multiple communities,” said Cheryl Porter, Chief Operating Officer, Water and Field Services, GLWA. “We look forward to continuing to improve the resiliency of a very large water main that supplies water to nearly one million people. This project is an excellent example of regional collaboration. It showcases how we can work together to proactively address infrastructure needs and continue to provide water of unquestionable quality, all while reducing construction impacts to local communities.”

The Dequindre Road infrastructure improvements entail:
• Installing 8,000 linear feet of 96-inch diameter welded steel pipe starting on Dequindre Road between Avon and Hamlin Roads, followed by Dequindre Road between 23 Mile Road and the Macomb Orchard Trail;
• Reconstructing Dequindre Road between Hamlin Road and the Macomb Orchard Trail;
• Replacing the elliptical corrugated metal pipe culvert with a new concrete box culvert at the Honeywell Ditch.

“This has been a great cooperative effort between GLWA, RCOC, Macomb Department of Roads, the cities of Rochester Hills and Rochester, and Shelby Township,” said RCOC Chair Andrea LaLonde. “Not only does it ensure an uninterrupted water supply for the region, but it has also improved pedestrian and traffic safety and traffic flow along the Avon and Dequindre corridor. We look forward to the additional improvements as a result of the next phase.”

Further details of the GLWA and RCOC project can be found online at or by phone at 877-237-7311.


About the Great Lakes Water Authority (GLWA)
The Great Lakes Water Authority (GLWA) is the provider-of-choice for drinking water services to nearly 40 percent and efficient and effective wastewater services to nearly 30 percent of Michigan’s population. With the Great Lakes as source water, GLWA is uniquely positioned to provide those it serves with water of unquestionable quality. GLWA also has the capacity to extend its service beyond its 88 member partner communities. As part of its commitment to water affordability, the Authority offers a Water Residential Assistance Program to assist low-income households in participating member communities throughout the system. GLWA’s board includes one representative each from Oakland, Macomb and Wayne counties, two representatives from the city of Detroit and one appointed by the Michigan governor to represent customer communities outside of the tri-county area.

About the Road Commission of Oakland County (RCOC)
RCOC maintains the largest county road system in the state, with more than 2,700 miles of roads. It is a national leader in both road safety and the application of advanced technology to road and traffic management. For more information about RCOC, visit the RCOC website at

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Latest Update:

November 6, 2023 10:12 AM

Dequindre Road, Hamlin to Avon Road, is closed until November 2024 for Great Lakes Water Authority infrastructure work.