CivilCorp, an ESP company, provided superstructure design as well as structural design and details for substructures, pile foundations, and sheet pile walls to replace the north and south timber bridges on a local road south of SH 316 in the coastal area of Matagorda Bay. To accommodate two ten-foot lanes of traffic, each of the existing single-span, one-lane bridges with timber bridge deck and foundation was replaced with a single 25-foot span of prestressed concrete slab beam bridge superstructure supported by precast concrete slab beams and 18-inch square prestressed concrete piles. The abutments are supported by eight-inch sheet piling to provide additional support and stability for the bridge structures by retaining soil around the abutments.
With very little available freeboard above the normal water elevation in this low-lying area, our team designed the bridge to withstand inundation and protect the bridge abutments and approach roadway embankment from tidal and brackish stream current. Project scope also included preparing bid documents and the construction contract, securing and evaluating bid solicitations, and collaborating with the contractor after bidding to further optimize the foundation design and save the county an additional $16k in construction costs. After bridge construction is complete, our team will assist the county’s TxDOT application for both bridges to be put on the state’s off-system bridge program for future development and maintenance.
Calhoun County
Port Lavaca, TX
Completed
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