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1.60 -C- Is there sanitary storage capacity in Plymouth Road corridor? If so, what impact did this have on flow data and reduction of backups since 2001?

Posted by Lori Byron on 31 Dec, 2013
Category: Category 1 - SSWWEP Questions and Presentations

Frank Burdick’s Log Number: 83
Submitted by: Burdick log
Category (1,2,3): 1
Status: Closed
Estimated date to address: N/A

Q. 1.60 Research has revealed that sanitary storage capacity may have been installed since 2001 in the Plymouth Road corridor. Is this correct? What impact DID this have on the Flow data recently presented by OHM and on the reduction of Sanitary Backups since 2001? (Burdick 83, 12/30/13)

Comments

Lori Byron on 8 Jan, 2014:

The City is not aware of any projects along the Plymouth Road corridor since 2001 that have added sanitary storage capacity. 

Frank Burdick on 14 Jan, 2014:

Was there any storage projects installed in this area prior to 2001?

Lori Byron on 21 Jan, 2014:

Email from Nick Hutchinson, asking for more information:

Frank, may I follow up on this with some clarifying questions?  When you say “in the Plymouth Road corridor” do you mean in or adjacent to Plymouth Road, or do you mean anywhere on the northeast side of town? Is there a specific location that you are thinking of? There is some detention at the Georgetown/Bluett area, but that was installed very long ago – late 60’s or early 70’s, I believe. Are you referring to this?

Frank Burdick on 22 Jan, 2014:

There is some detention at the Georgetown/Bluett area, but that was installed very long ago – late 60’s or early 70’s, I believe. Are you referring to this?

What can you tell us about this?  What did it consist of and how effective is it.?

Lori Byron on 22 Jan, 2014:

Thanks, Frank. I've sent your follow up question to Nick Hutchinson.

Lori Byron on 30 Jan, 2014:

[CITY]: 

The detention consists of a 58” x 94” arch pipe installed in 1969, which can handle 149,012 gallons of storage, and is still in service.  In the late 1990’s and early 2000’s the area still experience numerous basement backups, which resulted in this area becoming one of the FDD study areas.  So, it appears that this detention was insufficient to prevent basement backups.

Jim Osborn on 30 Jan, 2014:

I doubt that this pipe is empty prior to a rain, so therefore its storage must be somewhat less.
How deep is it? basement backups of storm water or raw sewage?

I wonder what expense it adds to other in-street plumbing projects, as it must be worked around and avoided whenever the road is dug up to replace other pipes.

What a curious shape