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

2.68 - Why can't the FDD be done out at the street level rather than in residents' homes?

Posted by Lori Byron on 21 Dec, 2013
Category: Category 2 - about potential recommendations

Frank Burdick’s Log Number: 58
Submitted by: Burdick log
Category (1,2,3): 2
Status: Closed
Estimated date to address: N/A

Q. Why can't the FDD be done out at the street level rather than in residents' homes? Couldn't a separate storm line (for FDD water only) be constructed? 

[CITY] A.58. For a typical house with a footing drain connected, the footing drains beneath a house and the sanitary sewer lines in the house merge at a confluence point beneath the house foundation, and a single sanitary sewer service lead transports both flows to the sanitary sewer. Therefore, separation of the footing drain flow from the sanitary flow requires construction within the basement of the house. 

That construction in the house entails the installation of sump pump and a sump pump discharge line transports the footing drain flows to a pipe in the street.  Often, there is not a convenient location to connect this sump pump discharge line into the storm sewer system, so a curb-line drain is installed within the right-of-way behind the curb to collect the sump pump flow several houses.  This curb line drain then connects to the storm sewer system at the next convenient storm manhole or curb inlet. Therefore, disconnection of the footing drains entails both construction within the homes and construction within the right-of-way at the street. 

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