MTA 55 Th Street Ventilation Facility, New York

The $56 million facility when completed will provide critical ventilation for the new tunnels that will carry Long Island Rail Road trains to Grand Central Terminal, as well as Grand Central's new LIRR passenger concourse. Unlike most other ventilation facilities, this one will be built entirely underneath the street's pavement; it will not have an above-
ground component.
EWF was engaged to perform the control survey so the new structure would be constructed in the correct horizontal and vertical position with respect to other completed features of the East Side Access project and existing structures in the vicinity of and adjacent to the new structure. Following the control survey, EWF has provided construction layout and
as-built construction survey services with one full-time on-site survey field crew with technical support from EWF’s NYC office.
EWF has also performed the 3D scanning and Modeling of the Cavern.