Charlotte Water determined that a portion of the existing Paw Creek Outfall had an extremely limited wastewater capacity, a situation likely to grow more serious with future area development. McKim & Creed was selected to analyze multiple alternatives, including the construction of a parallel relief sewer and the complete replacement of the outfall, for providing the necessary additional wastewater conveyance capacity.
As part of the alternative analysis, McKim & Creed conducted a thorough and systematic evaluation of the Paw Creek Outfall. The team assessed existing manholes, monitored channel flows, generated projected wastewater flows, and evaluated stormwater inflow and ground water infiltration effects on the existing interceptor. These activities culminated in the development of rehabilitation and replacement initiatives that addressed structural inadequacies and accommodated for future hydraulic conditions.
The project team determined to proceed with a full replacement of approximately 12,500 LF of the Paw Creek Tributary Outfall with 36-inch and 30-inch ductile iron gravity sewer pipes. McKim & Creed delivered the required engineering, surveying and SUE services to ensure the success of the project, including preliminary and detailed design, bidding, contract administration, resident observation and operational phase services. The team provided a sanitary sewer system evaluation, a preliminary engineering report (PER), significant bypass pumping and diligent coordination with Charlotte Water.