Willis Avenue Bridge Reconstruction

This $612M project involved the replacement of the Willis Avenue Bridge, a swing-type movable bridge, over the Harlem River. The project area included work on and over the Harlem River, the FDR Drive approach ramp and the ramp onto Bruckner Boulevard, CSX Railroad, and over the Major Deegan Expressway. The project consisted of all aspects of bridge and highway construction including water and waterfront geotechnical, foundation, structural, electrical, mechanical, steel fabrication, and extensive maintenance and protection of traffic, and traffic signal-related work. The new bridge was constructed south of the existing bridge.

The new swing span was fabricated and assembled off-site and was floated into place once the foundations, center pier, and rest pipes were ready to receive it. Construction phases include: mobilization, preparation of shop drawing, traffic management, laying foundation in land and water, building temporary loop ramps and viaduct, paving and graduate demolishing of existing structures, deck construction, installation of machinery and electrical work, overseeing the fabrication and assembling of the new bridge at an off-site location, final restoration, and sign installation. At the completion of the construction a complete inspection of all bridge elements took place followed by operators training and preparation of O&M manuals.



New York City Department of Transportation (NYCDOT)


Key Services

  • Resident Engineering Inspection
  • Environmental Inspection
  • Construction Inspection
  • Office Engineering
  • Site Safety Management

Project Description

EnTech provided the resident engineer, chief inspector, inspectors, office engineers, environmental engineers and site safety managers. Our environmental engineers were responsible for all services related to the hazardous material sampling, lab data review, remediation design, and abatement of lead, asbestos and other hazardous materials in and around the structure. They oversaw environmental site activities, composed reports, reviewed contractor’s work plans and health and safety plans, and ensured proper air monitoring was performed during abatement activities. Other responsibilities included overseeing project activities including technical construction issues, managing daily activities at the site, review of field operations, review of payments to the contractors, review of RFIs and shop drawings, and resolving constructability problems. EnTech coordinated with involved parties such as NYSDOT, USCG, OCMC, CSX Rail Road, NYSDEC, NYCDEP, and NYCDOT offices such as EAB and QA, while coordinating with CSS regarding the design modifications.