Pozotrigo Engineering P.C.

Reconstruction of Route 9A following the World Trade Center attack, delivered as a 24/7, fast-paced project requiring extensive coordination with the federal government, Office of the Mayor, NYCDDC, PANYNJ, MTA, NYCDOT, NYSDOT, and private utility companies. A temporary roadway was built in seven weeks and praised by the Governor; it included new utilities, sewers, watermains, pavement, and landscaping. Work continued for two additional years and included construction of a new pedestrian bridge over Route 9A. Construction cost: $30 million.

Complex nine-stage reconstruction of a three-deck FDR Drive structure carried out under live traffic. Work included demolition of the middle deck, construction of a temporary outboard detour road (ODR) in the East River using large drilled caissons, four million pounds of structural steel, one kilometer of precast concrete deck slab, and a first-of-its-kind one-kilometer tubular fender system 11 feet in diameter anchored to the river bottom by iron chains. Main structure rehabilitation required demolition of the 27-inch concrete deck slab sandwiched between live traffic below and building structures above, followed by full seismic retrofit including moment connection plates with full penetration welds, column strengthening, and fiber polymer and cement-lining wraps. Praised by NYSDOT for execution, timing, and savings to NYC motorists. Construction cost: $147 million.

Construction inspection services for rehabilitation of the Alexander Hamilton Bridge (AHB) and six Highbridge Interchange structures. Scope included substructure rehabilitation, full deck replacement, and widening the AHB deck by 11 feet on each side to introduce standard shoulders. The Ramp TE bridge - connecting the Trans Manhattan Expressway to the George Washington Bridge over Highbridge Park and I-95 - was a complete replacement requiring extensive park mitigation including a new skateboard park and new plantings. The six Highbridge Interchange ramps received full deck replacement and 1.75-foot widening on each side. Four temporary ramps comprising eight temporary bridge structures managed traffic during construction; work zone traffic control required coordination affecting the George Washington Bridge, Harlem River Drive, and Major Deegan Expressway. Construction cost: $420 million.