New NY Bridge
The existing Tappan Zee Bridge is a 3-mile crossing over the Hudson River connecting Rockland and Westchester Counties. Subsurface conditions are extremely challenging: a rock profile that extends deeper than 700 feet, with thick soft compressible clay deposits. Working for the NY State Thruway Authority, MRCE leveraged decades of marine foundation knowledge and expertise to abate the significant risks and uncertainty introduced by the challenging subsurface conditions.
MRCE designed and executed a pre-bid Pile Installation and Load Demonstration test program, the first ever on a NY State Thruway Authority project. The MRCE pile test program reduced uncertainty in the design of the foundations, provided pile installation and test data to prospective bidders, which significantly reduced the risk foundation construction introduced to cost and schedule. MRCE provided design peer review, construction inspection, and construction management services to the Thruway Authority for pile foundation construction.