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R.L. Jackson Sewer Model

ClientClayton County Water Authority
LocationClayton County, GA

R.L. Jackson Sewer Model

The sewer system model owned by the Clayton County Water Authority (CCWA) was developed in 2010 and is an effective steady-state model, using peaking factors to simulate wet weather conditions and only include limited piping. As a sub-consultant to CH2M Hill, R2T was tasked with enhancing CCWA’s sewer model within the InfoWorks CS software platform. The enhanced model will allow CCWA to more effectively identify available pipeline capacity for planning decisions. The enhanced model includes:

  • All pipes 10” and larger
  • Dynamic calibration to dry and wet weather flow monitoring
  • Updates from new and abandoned features 

While part of the project team was tasked with updating areas already modeled, R2T was tasked to build and calibrate a sewer model for the R.L. Jackson basin within the larger W.B. Casey sewershed, which had never been modeled. The model’s construction also included flow and rainfall monitoring, record drawings, and topographic data.

The completed model is to be used to output static pipe capacities for use in capital planning, with capacity being determined by a desired level of freeboard between overflow level and peak sewage level. These pipe capacities will be used to plan for capital improvement projects and future customer connections.