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Development Of A Long Term Control Plan LTCP For Combined Sewer Overflow (CSO)

Client:Pittsburgh Water & Sewer Authority
Location:Pittsburgh, Pennsylvania


As part of the efforts by the Pittsburgh Water and Sewer Authority (PWSA) to comply with EPA Combined Sewer Overflow (CSO) policies and regulations, PWSA has embarked on a project to develop a Long Term Control Plan to address the CSO problems. PWSA divided the entire system area into two regions and Chester is one of the companies studying Region 2. The primary challenges faced by PWSA in the development of better municipal management systems include the ability to accurately and comprehensively characterize the entire system, develop a defensible modeling to evaluate system performance under different conditions, develop a sustainable and affordable long term control plan, and at the end satisfy the regulators in complying with NPDES permit requirements.


Key Project Features:

  • Historical Review & Development of CSO Monitoring & Sampling Plans
  • Evaluation of CSO Diversion Chambers and Outfalls
  • Evaluation of Televised Sewer Node Networks
  • Installation and Collection of Flow Monitoring and Water Quality Data
  • Collection System Modeling
  • System Inventory, System Hydraulic and Hydrologic Characterization Reporting
  • Development and Evaluation of CSO Control Alternatives
  • Development of a Long Term Control Plan
  • Organization of Public Participation Meetings


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