Construction continues to progress on the I-395 Signature Bridge, a 1,025-foot-long, six-arch structure spanning NE 2nd Avenue and Biscayne Boulevard in Downtown Miami. Designed by Donald MacDonald Architects with HDR serving as engineer of record for the bridge and I-395 roadways, the structure is being built by the Archer Western-de Moya Group joint venture. The bridge forms part of the broader I-395/S.R. 836/I-95 reconstruction project, undertaken by the Florida Department of Transportation and the Greater Miami Expressway Agency.
According i395-Miami/Miami Connecting September 2 update, accompanying drone footage documents ongoing arch and roadway work. Arches 1, 2, 4, and 5 are now closed, while crews continue constructing the first of three cast-in-place structural elements for each of the remaining arches, numbered 3 and 6. Work on the westbound Signature Bridge superstructure is advancing concurrently, with falsework, formwork, reinforcing steel installation, and concrete pours continuing beneath the arch framework.
The bridge’s design, known as The Fountain, features six arches converging at a central pier. According to HDR, the largest arch rises approximately 325 feet above the ground and spans 650 feet. The roadway will be carried by twin cast-in-place concrete box girders suspended from the arches by stay cables. Temporary falsework supports the roadway structures during construction, with their weight ultimately transferred to the arches through the cable system…