Conner Creek CSO Control Facility: Michigan’s Largest Client: Detroit Water and Sewerage Department Location: Detroit, MI When storm ows overloaded Detroit’s combined sewer system, untreated wastewater owed from three outfalls into Conner Creek, a half-mile-long tributary to the Detroit River. This constituted the largest CSO discharge in the state of Michigan, totaling about two billion gallons per year. Due to the enormous volume and widely uctuating nature of these discharges (ranging from less than 500 to over 14,000 cubic feet per second), controlling these ows presented a complex engineering challenge. The Detroit Water and Sewerage Department retained Hazen and Sawyer as the lead of a multi- disciplinary team, to assist in the planning, design, and construction oversight of a ne

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