The Henry Hudson Bridge, a two-level spandrel arch bridge, is a vital part of New York City’s highway network, carrying the Henry Hudson Parkway and 70,000 vehicles per day. In 2012, it became the first Triborough Bridge and Tunnel Authority (TBTA) facility to adopt cashless All-Electronic Tolling (AET). The TBTA contracted EnTech to provide construction administration and construction inspection (CA/CI) services for a project encompassing multiple major improvements to the bridge complex.

To yield faster travel across the bridge this complex reconstruction included: tollbooth removal on the upper and lower levels; toll plaza reconstruction; demolition and reconstruction of the bridge’s southbound approach; removal of support columns on the lower roadway, necessitating a new upper-roadway structure; reconstruction of a maintenance garage; and new and relocated electrical and utility feeds.

EnTech’s team monitored the contractor’s implementation of maintenance and protection of traffic (MPT) on northbound and southbound levels, including lane reductions. In addition to CA/CI and coordination, EnTech’s services included safety and health oversight, quality assurance, environmental compliance oversight, document control, scheduling, and managing independent confirmatory inspection and testing.

EnTech’s CI team contributed several significant innovations, including recommending high-performance internal curing concrete (HPIC) for the concrete deck, a first for a TBTA bridge. In recognition of EnTech’s exemplary work, the project earned the 2020 Project of the Year Award from the American Society of Highway Engineers (ASHE) NY Metro chapter.