Alpha & Omega Group provided civil, structural and water resources engineering services for the design of new sidewalk infill and a new pedestrian bridge linking sidewalks along SW Cary Parkway. Previously, along the south side of the parkway, a pedestrian bridge over a Crabtree Creek tributary connected sidewalk at street level, but on the north side, no bridge existed. The Town of Cary asked Alpha & Omega Group to provide engineering services for a new pedestrian bridge on the north side of SW Cary Parkway, linking sidewalks at street level.

A&O designed a pre-fabricated bridge based on “no-rise” conditions to show that the bridge would not cause base flood elevation increases. The bridge was placed so that it would completely span the floodway above the 100-year base flood elevation. We provided erosion and sediment control design to preserve natural topography, minimize fill or impacts to existing infrastructure and natural resources where feasible. The project included FEMA flood modeling and reporting, utility relocation and coordination, and local, state and federal permitting. We designed bridge elements, including the abutments, footing, and guardrails, per specifications provided by the pre-fabricated bridge manufacturer. A&O reviewed all bridge design elements and shop drawings prepared by the bridge manufacturer and provided recommendations to the Town. We also provided support for environmental permitting, traffic control, public outreach, construction documents, construction administration, and as-built drawings.