The Gateway Project consists of 3 major components: the first one is the design and construction of SR 690, a new four-lane tolled (static) expressway connection from US 19 (SR 55) to west of I-275 (SR 93). This segment includes flyovers connecting to mainline US 19, structures over crossroads and sensitive lands, viaducts over surface roads, ramps, and widening and rehabilitation of existing structures.
The second, is SR 686A, a new four-lane elevated tolled expressway running from the Bayside Bridge to I-275. SR 686A is located within the median of Roosevelt Boulevard from the Bayside Bridge to Ulmerton Road and includes a new interchange at SR 688. The improvements continue south along a new alignment through the old Speedway property until it merges with SR 690 via flyover bridges and continues east toward I-275.
Another important element of the job is the reconstruction of the existing SR 686 from the Bayside Bridge to SR 688 as two one-way surface roads, including new access configuration and roads for the St. Pete-Clearwater International Airport terminal; Resurfacing 118th Avenue North pavement, from US 19 to 31st Court North; reconstruction/widening/rehabilitation of sections of existing US 19 and 118th Avenue North. The project also includes utility work for the City of Largo, City of Pinellas Park’s and Pinellas County within the project limits.
The third major component includes the design and construction of tolled (dynamic) Express Lanes along I-275 from south of Gandy Boulevard to north of 4th Street North. This Project will also provide a direct connection from the SB I-275 express lanes to WB Gateway Expressway and from EB Gateway Expressway to the NB I-275 express.
Major structural project features include:
- 32 bridge structures consisting of 25 new bridges, 5 widenings, and 2 bridge modifications.
- 6 steel plate I-girder bridges, 2 steel plate box girder flyovers, 21 Florida-I Beam bridges, 1 flat slab bridge, and 1 bridge culvert.
- The Florida-I Beam (FIB) bridges utilized all different types of Florida-I Beam sizes and consisted of single-span and multi-span bridges with span lengths varying between 90 feet to 200 feet.
- Project included a 4,035-foot-long viaduct bridge of 26 spans along SR690/118th Avenue North consisting of Florida-I 84 and 78 beams supported on post-tensioned hammerhead pier caps. The pier caps were constructed in three cast-in-place post-tensioned segments to minimize impacts to existing traffic.
- The steel girder flyovers consisted of several curved continuous units with span lengths reaching 320 ft. Steel integral cross beams were used to minimize profile impacts including a 107’ integral steel straddle spanning over I-275.
- The segmental superstructure of the existing 4th Street flyover over I-275 was removed in its entirety utilizing self-propelled modular transporters (SPMT) to expedite the construction and minimize impacts to traffic.
- Miscellaneous structures including permanent/temporary walls, noise walls, sign structures including cantilevers, overhead signs, mast arms.
- Toll Gantries for Intelligent Transportation Systems.
BCC was the Lead Designer for this project, and provided design services for Structures, Roadway, Drainage, ITS, Signalization and Signing & Pavement Markings.