WGI provided structural engineering design to replace an existing concrete bridge with two 60-inch diameter HDPE pipe culverts. The bridge replacement was completed using phased construction to maintain at least one lane of traffic at all times. The culverts are enclosed within flowable fill behind concrete headwalls and retaining walls supported on helical piles. Vinyl sheet pile walls were used as temporary cofferdams during construction and as a permanent toe wall beneath the retaining walls.

Permits were obtained from the South Florida Water Management District, Department of Environmental Protection, U.S. Coast Guard, Army Corps of Engineers, and Palm Beach County Health Department (water & sewer). During construction, WGI provided periodic site visits for sheet pile driving, helical anchor monitoring, rebar placement, and concrete casting. WGI responded to RFI’s and change orders, reviewed shop drawings, conducted semi-final and final inspections, and provided certifications and close-out.