SANITARY SEWER EVALUATION

Project Details

CLIENT
Clayton County Water Authority

LOCATION
Morrow, GA

 

As part of its ongoing program to locate, prioritize and remove infiltration and inflow (I/I) from its collection system, Clayton County Water Authority (CCWA) contracted with Woolpert to perform a countywide sanitary sewer evaluation survey (SSES). Woolpert provided all services required by the first three-year contract and is currently working under a second three-year contract with the county.

Areas for SSES work were selected based upon the results of previous wastewater flow monitoring and institutional knowledge of the system. Woolpert’s tasks included:

    • Smoke testing (677,695 linear feet)
    • Manhole inspections (3,062 manholes)
    • Dye flooding (60 tests)
    • CCTV inspection (249,838 linear feet)
    • Sewer cleaning
    • Flow isolations
    • Bypass pumping
    • Flow monitoring (multiple basins, including performance monitoring)
    • Electro-scanning (10,260 linear feet)
    • GPS location of manholes and defects

Over the course of this contract, Woolpert has identified many significant defects that were allowing I/I to enter the system. Based on this data, CCWA crews performed immediate repairs to enhance operational performance and remove large quantities of I/I flow from the system.