The questions / info would be:

What are the size of these ?

When were they installed?

How effective were they?

What maintenance challenges or issues do they cause?

What lesson learned were gleaned from these?

 

If this storage capacity is in the street, buried somewhere, does it interfere with other utility pipes and lines when work needs to be done on one? I would think that some lines would need to cross over it or under it. If it is down deeper, then it would be hard to place such a system in a street that has existing lines and pipes.

Where exactly are these storage pipes located?In a street or in a field somewhere?

The facility near Yost Blvd (not Yost arena) & Salem Ct was installed in the late 60’s to provide relief for the Swift Run trunkine. The facility consists of three 54”x85” arch pipes which can handle 118,613 gallons of storage, and is still in service. Refer to the attached record drawing (Swift Run Storage Drawing.tif) for more information. The facility is located in open area adjacent to the Swift Run drain.  The need for additional relief was identified in the late 1990’s which led to the construction of a relief sewer further downstream from this existing storage facility.

The facility in Bluett & Georgetown consists of a 58” x 94” arch pipe installed in 1969, which can handle 149,012 gallons of storage, and is still in service.  The facility is located in the road right-of-way.  Refer to the attached record drawing (Bluett Storage Drawing.tif) for more information.  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. 

Conflict with existing utilities is a valid concern and will need to be considered during the alternative analysis phase when looking at storage as a possible alternative.