Route 206 Over Stony Brook Bridges Reconstruction and Replacement

Arora was the prime consultant of the rehabilitation of the Route 206 Arch Structure over Stony Brook, the replacement of the adjacent Route 206 Bridge over the Stony Brook Flood Channel and a long-term stabilization plan for the adjacent Worth’s Mill Ruin. The Route 206 Arch Structure over Stony Brook is a three-span masonry arch structure originally constructed in 1792 and widened in 1916 and is the oldest highway bridge in use in New Jersey. Responsibilities included the hydrologic and hydraulic analysis of the three arch culverts and a rectangular bridge opening acting as a relief along the left floodplain. Performed gutter flow analysis and drainage pipe calculations to space the roadway inlets and provide proper outfall pipe sizes. Stormwater management plans and calculations were performed in compliance with the stormwater rules to secure required environmental permits. Coordinated with NJDOT BLAES, Arora reviewed, and prepared the environmental permit applications, plans and addressed NJDOT and NJDEP comments to secure all permits, FHA-IP and FWW-IP. Arora performed a scour analysis to design the scour countermeasures along the relief bridge and the three arches. Articulated concrete block matting was used to provide erosion/scour protection. A small riprap line rectangular channel was also designed to convey low flows and avoid ponding below the relief bridge. Riprap stones were sized to provide erosion protection.