Continental Villas

Locust Valley, NY

H2M planned and designed the pump station and conveyance system to serve all 60 residential parcels within Continental Villas.

The Continental Villas subdivision in Locust Valley, NY was developed in the 1960s during a period of historically low groundwater levels. Immediately after completion of a number of was installed to service many of the failing septic tanks. Septic tank discharges to Mill River Preserve. This measure was intended as a temporary remedy, and the discharge from the contact chamber did not meet current water quality standards. The Nassau County Department of Public Works was given the responsibility of making failing on-site sanitary systems.

H2M planned and designed the pump station and conveyance system to serve all 60 residential parcels within Continental Villas and to allow the future connection of an additional 120 homes located in a residential area immediately to the south of Continental Villas. Wastewater from these areas is conveyed to the Locust Valley Regional Sewage Pump Station located within the Continental Villas subdivision. The pump station is located at the site of the existing disinfection chamber. In lieu of construction of a wastewater treatment plant on a parcel within Continental Villas, wastewater generated within the planning area is conveyed to the City of Glen Cove for treatment and disposal. The environmental include elimination of residential septic system discharge to groundwater near estuarine and marine wetlands and elimination of a chlorinated wastewater point source discharge to Mill Neck Creek, a tributary of the Long Island Sound.

Wastewater is conveyed from the pump station through a force main over three miles in length. To minimize road restoration and most of the HDPE force main pipe. The use of HDPE pipe will also reduce operating costs due to friction losses compared to other pipe material.

Two pairs of pumps in series have been provided to convey the wastewater. A precast concrete wet well, a precast concrete dry well and two precast concrete buildings were utilized. Architectural input by local residents. A vapor phase odor control system was provided for the wet well and ventilation from the wet well was through an activated carbon vessel. An emergency standby power generator and an aboveground, double-walled fuel oil tank were also provided at the facility. In lieu of an asphalt pavement driveway, a permeable reinforced concrete grid paver has been installed. 1,150 feet of 10 inch diameter sewer was installed to provide for future connections.

Awards
ACEC New York – Gold Award
ASCE L.I. Branch – Quality of Life Award