The Brooklyn-Battery Tunnel crosses under the mouth of the East River connecting Brooklyn to Manhattan. The tunnel consists of twin tubes containing four traffic lanes and carries over 57,000 vehicles per day. As the structure continues to age, the Authority has undertaken major rehabilitations of the Brooklyn toll plaza, particularly at the portal in the direction bound for Manhattan. These repairs are disruptive to traffic, require significant spending, and negatively impact tunnel operations. The purpose of the feasibility study and the investigations was to recommend preferred alternatives that will minimize the frequency of maintenance and repairs that have to be performed on the Brooklyn Battery Tunnel plaza pavement.
The civil engineering design scope of this project included a hydrology study of the existing conditions at the Brooklyn Battery Tunnel toll plaza. Based on the calculations, we provided recommendations for alternative solutions, developed notable risks, and proposed probable mitigation strategies. The alternative solutions included the design and sizing of potential storm drain system replacements.
Prime Contractor: Gannett Fleming Engineers and Architects, P.C.