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Sanitary Sewer Capacity Study
DeKalb County, Georgia

Client Challenge:

The sanitary sewer systems in several basin within DeKalb County are reaching their capacity.  Some of the pump stations in these basins are operating at or near capacity and have experienced overflows during wet weather.  The sewage flows in the basins will increase in the future as development occurs, further taxing this infrastructure.  The County needs a plan for improving the sanitary sewer system in these basins to insure adequate capacity and maintain the reliability of the system.

 
PRIME Solution:

Prime provided the County with a Capital Improvement Plan (CIP) for upgrading the sanitary sewer systems in the basins.  The improvements insured the system contains adequate capacity to convey the current and future flows.


Prime Engineering is currently analyzing the sewage flows, sanitary sewers, and pump stations in nine basins to determine the infrastructure improvements required to convey future flows in the basins within DeKalb County.

The Scope of Work for the project includes the following:

  • Determination of existing and future sewage flows in the basins
  • Analysis of the hydraulic capacity of the existing sanitary sewer infrastructure
  • Determination of the required improvements and modifications to each basin
  • Conceptual layout of gravity sewers in the Yellow River basin.

Prime Engineering will also develop a Capital Improvement Plan (CIP) for upgrading thesanitary sewer systems in the basins, insuring adequate capacity and maintaining the reliability of the system. 

The Capital Improvement Plan includes the following:

  • Estimate of the existing and future sewage flows in the basins;
  • Analysis of the hydraulic capacity of the existing infrastructure;
  • Recommendations for improvements to provide adequate capacity to meet the existing and future demands
  • Schedule and cost estimates for implementation of the improvement program.

The project also includes the following:

  • Analysis of existing sewage flow utilizing land use information in the County GIS system.
  • Flow metering at key locations to provide an estimate of the magnitude of any infiltration and inflow problems impacting the pump stations and verify accuracy of flow estimates.  

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