Western Sussex County Sewer Regionalization
Location Sussex County, DE
Client Sussex County, DE
Size 2.7 mile force main
Costs $11.6 million
Date of Completion 2020
Services #Construction Services #Consulting #Water / Wastewater Engineering
Sectors #Consulting #Government #Infrastructure #Wastewater Systems
The Town of Bridgeville, DE was facing unaffordable EPA-mandated upgrades to their wastewater treatment plant. Discussions between the Town of Bridgeville and neighboring City of Seaford identified an opportunity for regionalization. Bridgeville and Seaford partnered with Sussex County to develop a concept plan for conveying Bridgeville’s wastewater to Seaford for treatment. GMB was hired by Sussex County to assist with planning, design, and construction phase services for the regionalization project.
The project consists of the following elements:
- Modifications to the existing Bridgeville wastewater treatment facility (WWTF) and Heritage Shores Pump Station (HSPS) to reverse the flow direction through an existing force main to convey flow from the existing Bridgeville WWTP to the HSPS site, and to provide flow equalization storage at each location
- A new 2.7-mile sewage transmission force main to provide conveyance of wastewater flow from the HSPS to a new pump station located at the northerly extent of the City of Seaford City limits and within a planned future sanitary sewer district.
- A new Pump Station 16 (PS 16) with 42-inch flow equalization piping and 6.5-mile transmission force main to provide conveyance of the wastewater from PS 16 to the City of Seaford’s sanitary sewer collection system.
- Upsizing of ½ mile of existing gravity sewers in the City’s collection system for conveyance of flow to the existing Seaford WWTF.
- Flow monitoring and smoke testing to identify inflow sources and corrective action for removal of extraneous flows.
- A 1760 square foot garage to house County vacuum trucks and equipment to service the new District
Formation and regionalization of the Western Sussex County Sewer District proved to be cost-effective for both Bridgeville and Seaford. The County assumed all municipal sewer related assets, liabilities, and operational and maintenance duties of the District. The City of Seaford retained ownership of their WWTF. The project received funding from the DE Clean Water Revolving Loan Fund. GMB also assisted with cost estimating, council presentations, and the development of inter-municipal agreements.
