Oakwood Beach Interceptor
Trenchless Pipeline Installation
Staten Island, New York
This $200 Million microtunneling project involved the installation of 8.25 miles of sanitary interceptor sewer, connecting communities along the southern shore of Staten Island, New York, with an existing treatment plant in the Oakwood Beach section of the Island. Paulus, Sokolowski and Sartor (PS&S) provided structural and geotechnical engineering services for the final design phase, which included about 5,000 feet of 60" diameter and 600 feet of 10" diameter reinforced concrete pipe and nine manholes that ranged from 30 to 80 feet below the ground surface.
The microtunneling and pipe jacking methods of sewer installation below urban streets proved to be efficient and cost-effective for the New York City Department of Environmental Protection. Conventional trenching methods would have required opening up miles of streets for months at a time, creating significant disturbance to residents, and would have included extensive and costly dewatering.
PS&S was awarded the 1994 New Jersey Consulting Engineers Council Engineering Excellence Grand Award for its design efforts on this project.