The John Jay College project involves the construction of foundation including over 180 caissons from 20" to 36" in diameter. The site was the former location of a manufactured gas plant.

There are many complicating factors that have made the safe and timely completion of this project quite challenging. Because the site was the location of a manufactured gas plant, the site showed significant contamination and wet soil conditions. There are also highly variable geology and rock contours that meandered inconsistently throughout the site. Unexpected obstructions, debris and unsound rock are also found throughout the site, which have required implementation of rock sockets, caisson splicing and reinforcing.

Further, the project requires demolition of an existing roof slab spanning Amtrak's Northeast corridor main tracks, and significant changes have been made to the contract scope during construction to facilitate future vertical expansion of the college.

Posillico teamed with its Joint Venture partner, Gateway Industries, Inc. to plan, train and prepare its workforce to safely work in and around an extremely hazardous rocky and unsound construction environment.

Acute attention is paid to the varied contaminated materials present that are to be disposed of during construction. An organized method has been developed to handle and dispose of those materials to different facilities. This has minimized the impact to the work areas and project schedule.

Since the plan requires frequent track outages, we maintain diligent communication and a collaborative working relationship with Amtrak personnel. We plan carefully to optimize our productivity during those outages to keep them as brief as possible. We also maintain safe work zones that do not "foul" the Amtrak North East corridor rail line.