H&H performed design studies for the replacement bridge. The alternative studies were summarized in a design matrix to compare and contrast the various bridge alternatives. Corresponding advantages, disadvantages, service life, maintenance concerns, maintenance of traffic, and construction schedules were all prepared for each alternative as part of the BRPR and preliminary design process.
New bridge concepts range from steel superstructure through girder design, prestressed concrete girders, steel arch design, and cable-stayed concepts. The new bridge will cross the heavily used FDR Drive as well as a parallel access road, providing pedestrian access to the nearby high school as well as the privately-owned Waterside condominiums along the East River. In addition to the design alternative analysis, H&H was involved in coordinating with the adjacent community and evaluating right-of-way impacts.
The study was part of the NYCDOT Bridge Reconstruction Project Report phase (BRPR), consisting of six replacement alternatives to replace the existing East 25th Street Pedestrian Bridge crossing Franklin D. Roosevelt Drive in Manhattan.
The project scope included an in-depth condition inspection in determining the structural capacity of the existing bridge and highlighting non-conforming design details.
