• Location: Tampa, Florida

To support the reconstruction of 2.3 miles of I-275 in Tampa, Florida, B&N worked closely with the Florida Department of Transportation (FDOT) to provide drainage design and stormwater management engineering services for this design/build project.

The project included the full reconstruction of the southbound lanes to provide four through lanes and a southbound frontage road, as well as drainage improvements. B&N’s scope of work included the design of a single storm sewer system along the City of Tampa’s Green Street with over 200 drainage structures. The system was designed to convey runoff from the reconstructed interstate and all contributing drainage from adjacent residential and commercial areas to a single stormwater management facility.

The storm sewer design was done with much consideration given to all existing utilities, temporary drainage conditions and the project’s traffic control phasing. An 84-inch reinforced concrete pipe provides conveyance to the stormwater management facility, which was designed with an impervious liner to isolate it from the groundwater table and to gain more vertical storage. Effluent filtration was used for water quality treatment.