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2.98 -C- Did the 2001 Sanitary Sewer Overflow Study consider what the impact to the stormwater system would be as a result of the flows being added by the sump pumps?

Posted by Lori Byron on 22 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. Did the 2001 Sanitary Sewer Overflow Study consider what the impact to the stormwater system would be as a result of the flows being added by the sump pumps?

A. The analysis performed in 2001 estimated footing drain disconnection could increase the volume of flow discharging to the storm drainage system by up to 3-5%. However, during the largest storms that cause basement flooding, the storm drainage system is not designed to convey these peak flows downstream, but instead temporarily stores some of this water in the streets. It was determined the increase stormwater volume from the sump pumps would not be noticeable because it would only increase the depth of the water in the streets by a few percent. 

Comments

Frank Burdick on 20 Jan, 2014:

1. Who has provided this response to Lori B?  As with all responses to the questions, they only can be perceived as credible IF the source of the response is indicated.  What prevents the consultants from "creating" their own responses to questions directed TO the city FROM the citizens.
2. If the above response is true, then why are certain areas of the city under a mortitorium to halt furhter discharges of FDD water into the storm system?  

Lori Byron on 22 Jan, 2014:

Frank, 

The second part of your question has been forwarded to the City for response.

Regarding who provides answers to questions, it is either the City or OHM Advisors (unless the question is about something peripheral, such as how Basecamp functions.) ALL responses are reviewed by the City's Project Manager before they are distributed (whether it's in a meeting summary, a log, or posted on Basecamp.)

Lori Byron on 27 Feb, 2014:

[CITY]

A: The existing suspension is on performing City required FDDs in the Morehead and Glen Leven study areas only; there is no moratorium on discharging FDD water into the storm system.