This project completely reconstructed SR-5 (US-1) from the South Florida Water Management District’s Canal C-111 (Mile Marker 116) to SW 344th Street (Mile Marker 128) in Florida City, Miami-Dade County. The project was designed and constructed as a public-private partnership (PPP) design-build project between the Florida Department of Transportation and OHL Community Asphalt.
OHL-Community Asphalt negotiated all financing for this project. It was not bid as a conventional project, but instead the company took the initiative to submit an unsolicited proposal to the Department, while the firm was constructing a segment just south of this one from mile marker 113 to 116.
The project’s scope included full roadway and bridge reconstruction, which involved clearing and grubbing, demucking, excavation, embankment, drainage, lime rock and asphalt base, asphalt pavement, median concrete barrier wall, construction of a three-span bridge over the C-111 Canal and two single-span wildlife crossing bridges, temporary and permanent mechanical stabilized earth (MSE) walls at all three bridges, as well as guardrail and fencing along the whole corridor to prevent animals from crossing the roadway. The deteriorated condition of the existing bridge over the C-111 Canal required the construction of a new bridge at a higher profile.
The two main hot items during the construction of this project are environmental issues, due to the proximity to wetlands areas on both sides of the roadway along the entire project corridor, as well as disposal of the muck material removed along the entire project corridor.
The project’s proximity to wetlands on both sides and for the full length of its corridor presented environmental challenges and complicated the disposal of muck material removed during construction.
Environmental issues proved to be the main challenge in building this project because of the project’s proximity to wetlands on both sides and for the full length of its corridor. This complicated the disposal of muck material removed during construction.
Benefits to the community
The new bridges and wider roadway created by this project will greatly ease the evacuation of residents in this hurricane-prone portion of the Florida Keys.
Reconstruction of the existing two-lane roadway. Provide a median barrier wall, southbound and north bound twelve-foot lanes, and acceleration / deceleration lanes.