8-1/2 Mile Relief Drain Drainage District In-System Storage Project

Wednesday, March 8, 2023 - 11:30 AM - Wednesday, March 8, 2023 - 12:30 PM

Progressing toward cleaner water, Macomb County initiated the “in-system storage” project. The project consists of installing a permanent inflatable rubber dam inside of the existing 8-1/2 Mile Interceptor. During wet weather, rather than discharging into the Chapaton Retention Basin, the dam will be inflated to store up to 3.5 million gallons of flow. Storing flow upstream of the dam is expected to reduce treated combined sewer overflows into Lake St. Clair by roughly 15%. To install the dam, an approximately 50 feet by 70 feet temporary earth retention structure (TERS) is being constructed to allow for the approximately 35-foot excavation to expose and open the interceptor.


Lunch, Presentation, and Tour at Chapaton Pump Station:
23001 E 9 Mile Rd.,
St. Clair Shores, MI 48080

In-Line Storage Project Site Tour
Intersection of Oak Ave. and Beaconsfield Ave
Eastpointe, MI 48021
(Directions from Chapaton Pump Station to the project site will be provided a week before the event) 


11:30 AM – 12:15 PM – Presentations/Lunch/Tour
12:15 PM – 12:30 PM – Site tour


By Email to [email protected] or
By Phone at (269) 240-3968

(Please RSVP by February 27th, 2023)

$10 per member for lunch
$20 per non-member for lunch

PayPal: Send payment to [email protected]

Make checks payable to ASCE SE Michigan Branch
Mail checks to:
Attn: Bryce Burkett
2631 Pineview Trail
Brighton, MI 48144