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

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2.78 -C- what is currently included in the FDD design to prevent sediment, sand, and other obstructions from "gathering" at the former low point in the footing pipe, and ultimately blocking the footing drain "upstream" of new FDD sump pump?

Posted by Lori Byron on 22 Dec, 2013
Category: Category 2 - about potential recommendations

Frank Burdick’s Log Number: 67
Submitted by: Burdick log
Category (1,2,3): 2
Status: Closed
Estimated date to address: TBD, CAC to prioritize

Q. It is presumed, that the footing drain piping that was initially installed when the house was built, is laid with a slight slope so that it will  "drain" or flow to the lowest point.  The existing clean-outs and connection to the existing sanitary sewer, and FDD required sump pump presumably occur at this lowest point.  In the event that a new FDD sump is not positioned at this lowest point, (ie: another location in the basement) due to the Homeowners' request, or due to other obstructions or restrictions, what is currently included in the FDD design to prevent sediment, sand, and other obstructions from "gathering" at the former low point in the footing pipe, and ultimately blocking the footing drain "upstream" of new FDD sump pump?

Comments

Lori Byron on 9 Jan, 2014:

City team members have referred this question to CDM to learn if the contractors have experienced this issue, and if so, how they handled the case. 

Lori Byron on 24 Jan, 2014:

[CITY]: 
It is a misconception that the footing drains are sloped. Typically, they are not sloped to a low point. The only sloped sections may be those that lead from the perimeter to a connection, and often that may be to get to the elevation of the connection to the sanitary lead. Even so, in the alternate sump location scenario presented, there is a risk that the footing drain system will not function as effectively as before, or that the footing drains are configured in a way that causes sediment build-up. This is explained to the homeowner before an alternate sump location is approved and the reason the alternate sump location release form must be signed.