On behalf of the New York City Department of Design and Construction (NYC DDC), STV is taking part in the third phase of the multi-year East Side Coastal Resiliency (ESCR) project to reduce flood risks to local properties and infrastructure while concurrently improving waterfront space in lower Manhattan. The firm is providing Resident Engineering Inspection (REI) services to help optimize drainage for a project which comprises parkland, floodwalls, and floodgates along 2.4 miles of the borough’s East side. As part of its REI services, STV will manage street and sidewalk closures, and potential watermain shutoffs. 

The project will modify infrastructure within the existing sewer system, including integrating two new isolation gates to sequester protected drainage areas from unprotected sections of the larger sewershed in the event of a storm surge, as well as installing new lines to increase capacity. These isolation gates will be installed in newly created chambers located 40 feet below grade, with the southern gate located near the Corlears Hook Bridge in Manhattan, and its northern counterpart adjacent to the East 20th Street service road. Each will close to eliminate pathways that would let storm waters flood the system and inland chambers, operating system controls contained in each new interceptor building.