The major station rehabilitation was part of MTA’s Second Avenue Subway program, which helped alleviate overcrowding on 4, 5, and 6 IRT Lexington Avenue lines.
OHLA USA company, Judlau Contracting, Inc. (Judlau), converted the station’s one-sided platforms into cast-in-place, island platforms and constructed four entrances—Entrance 1 featuring street-level escalators, Entrances 3 and 4 with access to staircases, while Entrance 2 provides access to ADA-accessible elevator.
Judlau also installed five elevators, two escalators, and various architectural finishes at the platform levels, including stainless steel column covers, porcelain enamel and aluminum composite ceilings, granite floor tile, and a porcelain ceramic wall tile system. In addition, at the corner of 63rd Street and Third Avenue, a tenantoccupied building was jacked to provide clearance to install support beams for the installation of finishes and an escalator.
The crews demolished and removed station’s ventilation system and installed normal and emergency station mechanical system that includes tunnel ventilation. Restricted space for the HVAC and ventilation equipment required detailed sequencing of the installation and the construction of two fan plants designed to operate together in the event of an emergency. The complete ventilation system incorporates four fans, 25 dampers, four motor control centers, four variable frequency drives and two supervisory control cabinets linked to a SCADA network accessible from the rail control center. The electrical distribution systems were also modified to provide 480V, 208V and 120V electrical service to the station and adjacent tunnel areas.
Site access for materials delivery and removal poised a challenge. Judlau’s unique delivery methods included forming a customized gantry team to assist steel construction and material handling. In addition, the team optimized use of work trains and General Orders and sequenced the work carefully to maximize access.
- Subway station rehabilitation
- Construction of cast-in-place platforms
- Installation of elevators and escalators
- Installation of mechanical systems including ventilation
- 2018 – American Society of Civil Engineers (ASCE) – Outstanding Civil Engineering Achievement Award
- 2017 – New York Transit Museum – Honoree