Client: Sandy Township Municipal Authority
Year Completed: 2006
Project Cost: $7,000,000
In response to chronic sewer surcharging in its sewage collection and conveyance system, the Sandy Township Municipal Authority launched a comprehensive sewer improvement program. Gwin, Dobson & Foreman, Inc. developed a corrective action plan (including system diagnostics) and designed a sewer replacement project.
The project included the following work elements:
- Update of Township-wide Act 537 wastewater management plan including alternatives evaluation, institutional assessment, cost-effectiveness evaluation and recommendations including centralized treatment for 2,000 unsewered customers in 12 subareas
- Development of a PADEP approved corrective action plan with milestone compliance schedule
- Sewer system flow monitoring and hydraulic modeling (SewerCAD©) in four key subsystems
- Designed sewer system diagnostic work to determine excessive inflow and infiltration; work included internal TV inspection, smoke testing, dye testing, and house inspections, performed by Township and Authority personnel
- Preparation of I/I diagnostic report with recommendations
- Design of 61,000 LF of 8″-12″ diameter PVC sanitary sewer pipe replacement project in the Oklahoma, Iselin, Shaffer Road and Pentz Run areas
- Design of sewer system rehabilitation work including 3,000 LF of 6″-10″ diameter cured-in-place pipe lining, manhole replacement and sectional spot repair
- Preparation of plans, rights-of-way, specifications, contract documents and permit applications for sewer project
- Construction management and PennVEST grant administration
The multi-year project resulted in abatement of sewer surcharge conditions and a reduction in infiltration and inflow to the City of DuBois regional wastewater treatment facility. The project was completed under budget and within the compliance schedule time frame.