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City of Ann Arbor SSWWEP - Citizens Advisory Committee Coordination — City of Ann Arbor

2.13 -C- What is the capacity of our storm system?

Posted by Lori Byron on 20 Dec, 2013
Category: Category 2 - about potential recommendations

Frank Burdick’s Log Number: N/A
Submitted by: August CAC meeting
Category (1,2,3): 2
Status: Closed
Estimated date to address: N/A

Q. What is the capacity of our storm system?

A. For a given area, the storm sewers generally have a much larger capacity than the sanitary sewers. This is because the flow generated from a property from stormwater runoff is significantly larger than the sanitary sewage generated, and the range of flows within a storm sewer system are much higher than that of a sanitary sewer system. Please note: storm systems are not designed to handle all storm events! In large events, surcharging into the streets is expected. The streets hold the water until it can enter back into the storm water system. The Stormwater Model Calibration and Analysis Project will determine the capacity and effectiveness of our storm sewer system. 

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