Bergen Point Wastewater Treatment Plant: Grit Improvements

West Babylon, NY

Suffolk County DPW

Contract Value:
$11.5 Million

Project Dates:
2014 to 2017


• Grit removal system improvements
• Demolition of existing grit building
• Construction of new grit washer building
• Lighting, plumbing, HVAC
• Construction of new channel aeration blower system
• Relocation of utilities
• Dewatering
• CFA piles


Posillico Skanska JV was brought in by Suffolk County DPW to perform improvements to the Bergen Point WWTP Grit Removal System. The project consisted of the construction of a new concrete grit channel, the retrofit of 2 existing grit channels and the installation of (12) grit air lift systems. Posillico demolished the existing mechanical, electrical and HVAC systems in existing grit building and constructed a new grit washer building, complete with lighting, plumbing, HVAC, mezzanine levels, architectural features, electrical controls, blower rooms and a new channel aeration blower system. Work included associated piping, relocation of various underground utility systems, installation of new utilities, dewatering and miscellaneous sitework such as new concrete structures installed on new CFA piles.


As is usually the case with this type of essential infrastructure upgrade, the scope of work had to be completed while the facility maintained continuous plant operations. This presented both safety and logistical challenges which had to be addressed in addition to the sequencing of the work based on restricted work areas. Coordination with ongoing contracts while on site at Bergen Point Wastewater Treatment Plant.


Posillico leveraged its robust safety training and field protocols to ensure the smooth progression of the project while keeping everyone present safe. Ongoing coordination with other trades onsite contributed to the effort to complete the work with no disruption to the plant operations. Through extensive communication and collaboration with Suffolk County and the Engineer of Record, Posillico facilitated design changes which resulted in significant reduction of overall construction risk to stakeholders, and ultimately allowed for the delivery of a superior final product.