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Conway/Briabend Storm Drainage Improvements

Public Meeting No. 1 Meeting Minutes

Location:    Grace United Methodist Church

Date/Time:     September 14, 2006 @ 7:00 P.M.    

Homes Represented:   8

Personnel Present:

Jennifer Barker, City of Charlotte                     
Chad Nussman, City of Charlotte
Steve Sands, USI of Carolina, Inc.                   
Josh Letourneau, Armstrong Glen, P. C.
John Driscoll, City of Charlotte                                     

Introduction by Jennifer Barker, Project Manager:

  • Introduction of the City of Charlotte-Mecklenburg Storm Water Services (CMSWS) personnel and the consultants
  • Looking at two main systems:  the Kenlough culvert (completed Kenlough project) and the pipe system upstream of the Firwood channel (current Conway/Briabend project).   
  • We plan to compare existing storm water models with Citizen storm water observations and service requests.  It is important that everybody gives feedback.   
  • Currently in the Planning Phase, the first phase of six phases in this project.
  • Video of the CMSWS program
  • Video of CMSWS CIPs and associated phases.

Questions / Comments During Presentation:

Citizen - Is the Kenlough culvert going to be a new project?

Jennifer Barker -  We will look at the Kenlough culvert as part of this project.  We cannot look to improving the upstream storm drain system without looking downstream.  How we handle the Kenlough culvert will depend on alternative analysis results and all citizen responses.    

Citizen - You tell us that certain rare storms flood our neighborhood in a given year.  We have been here for 18 years and I know for a fact that our house floods every time it rains.  My neighbors and I have to basically flood proof our homes every time we hear rain in the forecast.  15 minutes of hard rain result in flood water outside of the channel banks.  It seems water is always within 4' of entering our house.  We see deep, fast moving water coming down Firwood regularly.  The flooding patterns seem to have changed.  

Jennifer Barker -  All this information we receive from homeowners will be used to help adjust the models to accurately show the severity of the flooding present in the neighborhood.  The goal of the project is to lessen flooding within the design guidelines of City of Charlotte Storm Water Services.

Citizen -  Will the upstream SCIP project have an effect on our storm drain system?

Jennifer Barker –No.  The upstream SCIP work will not contribute any additional watershed to the neighborhood.

Citizen – How will bigger upstream pipes affect the Kenlough culvert.

Jennifer Barker – We will make sure that the larger upstream pipes will not negatively impact Kenlough.  One option is to look into upstream detention to help store and slow down the water.

Citizen - What caused the August 15 flood in our neighborhood?

Jennifer Barker – Collinswood Elementary School has a rain gage station which records rainfall data every 5 minutes.  The rain gage reported 5.5 inches of rain over a 4 hour period on August 15th.  This equates to little over a 25-year storm event.

Citizen – We've lived here for 10 years now.  We had 3 other storm events with similar strength as the August 15th storm.  Our fence line is a river during these storm events.  This rain is not a 50- or 100-year storm event.  These are just normal rain events causing all these problems. 

Jennifer Barker – We will adjust models/flood maps to better illustrate the flooding problems in the neighborhood. 

Citizen – We've lived here for 30 years.  We never had any flooding problems until 5 years ago.  Now, every time it rains I have to bail out water from my home.  The water seems to come from the bowling alley.  I want to know what has changed over the past 5 years that would cause such an increase in runoff.  We wonder if the upstream storage buildings have divert flow.

Jennifer Barker – Some pipes within the upstream property may have been upsized, causing additional water to flow downstream.  There also could be blockages in the pipe system. 

Citizen - During the August 15th storm event, our whole backyard flooded.  However, the flooding only lasted 5 minutes and then the water was gone. 

Jennifer Barker – We refer to this as flash conditions.  An Impervious watershed causes a quick peak runoff event.  The peak flow comes and goes within a small amount of time. 

Jennifer Barker – Who has had sewer backups along Kenlough Ave?  CMUD will need to be notified.

Citizen - Is storm water infiltrating the sewer system a problem for Charlotte Storm Water Services? 

Jennifer Barker – No.  CMUD is responsible for their sewer system.  There are measures that can be taken to minimize storm water infiltration.  

Citizen – The sewer line in from of my house had a rock stuck in it.  How does that happen?

Jennifer Barker –It is possible that something fell inside a sewer manhole.

Public meeting adjourned @ 9:00 p.m.