Client: Alexandria Borough-Porter Township Joint Sewer Authority, Huntingdon County, PA
Year Completed: 2014
Project Cost: $14,000,000
After an extensive wastewater planning process, the Alexandria Borough-Porter Township Joint Sewer Authority retained Gwin, Dobson & Foreman to design a regional sewer system extension and wastewater treatment facility upgrade project.
The project included the following:
- Wastewater collection system extension for 285 unsewered customers along Juniata Valley Pike, Barree Road, Loop Road and Juniata Valley Pike in south Porter Township. The project also connected the Juniata Valley Junior-Senior High School to the system.
- Installation of 66,000 LF of sanitary sewer pipe, 12 sewage grinder pumping units, 6 submersible lift stations and 15,000 LF of force main pipe.
- Process upgrades that included installation of a continuously sequencing reactor (Schreiber CSR™) to replace an existing contact stabilization system. The outer ring of the system operates in an activated sludge process while the center ring provides final clarification. Because the CSR can be operated in phased oxic, anoxic and anaerobic modes, future biological nutrient removal is possible.
- Ancillary facilities included a new influent wastewater pump station and headworks structure, control building, return activated sludge building, rotary press sludge dewatering system, UV disinfection unit, conversion of contact stabilization tanks to aerobic digesters, renovations to the existing sludge bagger building, cascade aeration structure, electrical and instrumentation work and process control system.
The project was funded by the Pennsylvania Infrastructure Investment Authority.