Palmetto/Dolphin Interchange

High level segmental flyovers built over multiple roads that carry 430,000 vehicles per day and are the tightest elevation curves erected in the United States

Bridges & Viaducts
  • Miami, USA
  • Bridges & Viaducts
  • Completed: 2015


  • Total number of segments 783;
  • Total length of all 4 bridges 2,355 m (each 14 m wide);
  • FICE Engineering Excellence Grand Award – 2016.


Construction of superstructure for the State Road 826 (Palmetto Expressway)/State Road 836 (Dolphin Expressway) interchange reconstruction. The scope of works included design, pre-fabrication, launch, and erection of an elevated deck, consisting of four bridges and forming a five-level cloverleaf interchange. Reconstruction was necessary to enhance safety and reduce congestion on the highway intersection.
The bridge ramps were constructed via balanced cantilever method, for a total length of all four bridges sums up to 2,355 meters, each 14 m wide. The curved ramps on the third level have 180 m radii and reach a maximum height of 29 m. All bridges are supported by pile foundations and reinforced concrete piers. 19,000 m³ of concrete was employed, 1,924 t of reinforcing steel, and 950 t of posttensioning steel.

Companies involved

Rizzani de Eccher USA Deal

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