H&H provided hydraulic analysis, inspection, and design services for the O-10 / Sunset Avenue over Deal Lake bridge replacement project. Built in 1924, the original O-10 Bridge was a five-span, 284-foot-long concrete encased steel girder bridge. Structural inspections revealed structural problems with the bridge’s substructure and structural inadequacy of parapet/balustrade components. Additionally, the bridge exhibited significant deterioration and its two-girder, non-redundant construction was considered fracture-critical.
H&H designed a continuous four-span precast prestressed AASHTO I-girder replacement bridge with a contextually sensitive design that included decorative fascia girders, cantilevered sidewalk, and open balustrade. The design achieved several important project goals: 1) Replace the structurally-deficient bridge, 2) Improve roadway capacity, 3) Improve road user safety, and 4) Improve pedestrian and bicycle access.
H&H performed an HEC-RAS hydraulic analysis to determine design scour parameters and to satisfy NJDEP Flood Hazard Area permit requirements for this tidally influenced lake and developed a hydraulic report. H&H also performed highway lighting analysis to support a historic lighting improvement to bring back the period lighting that once existed on the bridge.
With our subconsultants, H&H designed roadway improvements that improved pedestrian safety through several traffic calming measures and improved several substandard design elements. Our design scope included extensive community involvement activities to ensure the construction detour adequately addressed the concerns and requirements of the residents and commercial stakeholders