RFK/HRLS Fender Study
Under the ongoing contract, on an as-needed basis, INFOTRAN served as a sub-consultant, providing professional engineering and surveying services to the Triborough Bridge and Tunnel Authority (TBTA) for various work orders. For this work order, RFK HRLS Fender System Rehabilitation Upgrade and Tower Piers Access Walkway, INFOTRAN provided a 3D topographic and utility survey, and a Project Base Map, extending from Manhattan shore to Randall’s Island Shore for the Harlem River Lift Span, and up and down the river from either end of the Bridge Piers. For the Fender System Rehabilitation and the Tower Piers Access walkway, options were investigated to repair or replace the existing timber fender cribs and riprap fill at the base of both bridge towers.
The conditions of the fender piles, including marine borer damage to fender piles and fender boards, and corroded wire rope fender piles fastening were investigated along with the sinkhole caused due to the loss of stone fill from timber cribbing. The Project Team installed a new galvanized steel access walkway at the base of both bridge towers and connected to the existing navigation lights access walkway, along with the coordination of design with work to install the new walkway under project RK-83. The existing fender system are being investigated to check if they meet the current AASHTO code. Feasibility studies were performed for preventing vessel accidental grounding below HRLS eastern approach truss span. Miscellaneous findings were also reported in the biennial inspection report. The environmental survey was performed and a report on the findings was provided on the same.
MTA TBTA
LocationNew York, NY
Unique AttributesFender cribs and rip-rap fill 3D topographic and utility survey Feasibility studies
