How does the CSO retention/treatment shaft work?
Dearborns treatment shafts are about 100 feet in diameter and approximately 130 feet deep. About two-thirds of Dearborn is served by a combined sanitary/storm water sewer system. The treatment shaft system is designed to reduce overflows from the existing 45-55 to 2-3 per year and provide treatment of those discharges to meet federal water quality standards for body contact and for supporting healthy aquatic life.
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- How does the CSO retention/treatment shaft work?
