Platt Street Bridge PD&E Study and Bridge Replacement
Owner: Hillsborough County Owner: Tampa, Florida
The objective of the evaluation and PD&E Study was to provide documented information necessary for Hillsborough County to reach and support a decision for the future of the Platt Street (Channelside) Bridge. Bridge No. 105500, located on Platt Street over the Hillsborough River, was built in 1926. The structure consists of seven reinforced concrete girder approach spans and a steel girder double leaf bascule span. The functional classification for Platt Street is Urban Minor Arterial. The roadway carries four 10-foot eastbound lanes and has sidewalks on both sides. The double leaf bascule span is opened to river traffic on an average of 30 times per month. The structure is functionally obsolete and contained fracture critical components. The overall National Bridge Inventory (NBI) ratings were as follows: Deck: 6 Satisfactory, Superstructure: 6 Satisfactory, Substructure: 6 Satisfactory, Channel: 7 Minor Damage, Sufficiency Rating: 60.4.
The alternates considered and evaluated in the report were:
- Rehabilitation of the existing bridge.
- Double leaf Bascule Bridge on the existing Platt Street alignment with no structural impacts to the Tampa Convention Center parking garage and seawalls.
- Double leaf Bascule Bridge on the existing Platt Street alignment with structural impacts to the Tampa Convention Center parking garage and seawalls.
- Impacts to the traffic patterns into and out of the Tampa Convention Center were included for each alternative.
- Impacts to the intersection at Bayshore Boulevard were also analyzed and included for each alternative.
KCA’s duties include the traffic operations study necessary to determine the traffic control plan and signal modifications as well as preliminary design of the roadway approaches, traffic control plan, and signalization.
