Lower Detention Basin and Pedestrian Bridge
Las Vegas, NV

The project included inlet and outlet structures for a large detention basin.  The structures were constructed of reinforced concrete and included retaining walls and weir walls up to 32 ft. high.  Other features included a four cell reinforced concrete box culvert (RCB), large steel trash racks and a concrete lined spillway with energy dissipaters.

As a sub-consultant on the project, we were responsible for the layout and design of full structural system including design criteria to coordinate with hydraulic criteria, full structural analysis and production of full structural drawings, specifications, quantities take offs and estimate of probable cost.

Also part of the project was the design and construction of a new 220-foot, two span pedestrian bridge. The pedestrian bridge crosses the inlet channel for the Lower Las Vegas Wash Detention Basin. The bridge is a prefabricated steel truss structure built with weathering steel. The center concrete pier raises 45-feet above the channel below and the abutments at each end are 20-feet tall with 50-foot long approach slabs and wing walls. Our responsibilities included structural design of the pier, abutments, wing walls and approach slabs as well as geometric layout and specification of the prefabricated bridge truss.