Under an existing on-call agreement with the City of Charlotte, Alpha & Omega Group designed a permeable pavement section of bicycle lane as part of a road widening project along Prosperity Church Road. With the roadway widening already designed, the City’s goal was to tie sections of roadway together with a roundabout and to introduce the permeable pavement as a pilot project.

A&O performed hydraulic analysis with the use of permeable pavement to ensure appropriate storage and treatment of stormwater. We designed storm structures to tie into the City’s existing drainage system, while providing potential for future upgrade, if needed. We designed storage structures and permeable pavement to support traffic loading and provided details on plan sheets to be incorporated into the City’s plan set. A&O prepared an engineer’s cost estimate for construction.

After design was completed, the City discovered a 24-inch water line in the middle of the road, previously unknown, which would not allow the depth of the needed sand filter to be constructed for the project. The project is in re-design without permeable pavement.

Overview
 Client:
 City of Charlotte
Location:

     Charlotte, NC
Subconsultant: 

  F&R – Survey
Contact:
 
   Samantha Miller, PE, PMP, ADACTP 

   Program Manager

   City of Charlotte

   (980) 250-2569
Design fee: 

   $29,280 
Start/completion: 
 
     4/2021 – 

     9/2021 (Initial attempt) 

   Ongoing (Re-design)
Project manager: 
Ted Bartelt, PE
 
  Experience
  Hydraulic design
Drainage design
Stormwater control management
Erosion control
Traffic control
Engineer's opinion of probable cost