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Duff Street Storm Sewer
Community Involved: Borough of Emsworth
Project Goal: To assess the cost-effectiveness of removing a direct stream discharge into a sanitary sewer and its effect on eliminating wet weather sewer overflows at a pump station.
Project Summary: This project called for the construction of a storm sewer to remove from a sanitary sewer line two springs and runoff from approximately two acres. The goal of the project was to demonstrate that spring removal is cost-effective when a pump station is involved.
Total Cost: $ 51,405
3 Rivers Wet Weather Grant Award: $30,250
Start Date: September 2000
Completion Date: Winter 2002
Project Progress: Complete
Final Project Report: This project consisted of the construction of 640 linear feet of 12 inch diameter storm sewer, 2 inlets, one manhole and one storm sewer outfall. Eliminating spring water from the sanitary system decreases the flow entering the pump station by an average of 21,600 gallons per day, a 34% reduction of flow which results in an annual reduction of pumping costs of $1,274. This reduction also decreases the treatment cost by approximately $17,500 per year. The direct stream removal has eliminated a large amount of grit and debris at the pump station, therefore reducing the operating and maintenance costs by approximately $2,000 per year. Over the next four years, this cost savings to the Borough will equal the total project costs, including design and construction. This direct stream removal allows for future development by increasing the available capacity of the pump station.
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Completed storm sewer drains to natural groundwater recharge area
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