• Geotechnics
  • Railroad / Transit Tunnels
  • Tunnel Rehabilitation
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Weehawken Tunnel West Portal Retaining Wall

New Jersey Transit (NJT)

The Weehawken Tunnel Project consisted of the rehabilitation of an approximately 4,200 foot (1,280 meter) long, 23 foot (7 meter) wide excavated tunnel from a double-track freight rail to a double-track light rail system. The project also included a large underground station cavern, an approximately 40 foot (12 meter) diameter elevator shaft, and extensive portal slope stabilization and drainage measures. In order for the 120-year-old Weehawken Tunnel to be reconstructed, a deteriorating slope at the west approach to the tunnel needed to be stabilized.

Slope Stability Analysis, Design, and Consulting:

Gall Zeidler Consultants provided Slope Stability analysis and design services for a heavyweight retaining wall made of individual cast-in-situ concrete blocks. In 2009, the design was honored with the Community Service Award for its excellence in construction and renovation of the Hudson-Bergen Light Rail Transit System (HBLRTS).


North Bergen, New Jersey


2005 – 2006


Retaining Wall


9 feet (3 meters)


Highly Weathered Sandstone


Approximately $150 Million


Twenty First Century Rail Corporation


New Jersey Transit (NJT)