US-based architectural, engineering and consulting firm HDR has been appointed by Florida Department of Transportation (FDOT) as the lead designer for the construction of I-395 bridge and reconstruction of 1.4 miles of interstate near Downtown Miami.
The bridge will be the largest pre-cast concrete segmental arch bridge in North America.
The $803m project is being procured through a public-private partnership (P3) between FDOT and the Miami-Dade Expressway Authority (MDX).
FDOT has awarded the contract to Connecting Miami, a joint venture comprising Archer-Western and the de Moya Group.
HDR is the engineer of record for the signature bridge, roadway and drainage design for the I-395 viaduct, and for 13 conventional bridges along the corridor.
The design scope involves improvements to the SR-836/I-395/I-95 interchange. Design will take 24 months and construction will commence in 2018. The bridge is expected to be opened in 2022.
The signature bridge, located near the eastern boundary of the project, will be named The Fountain. It will span 1,025ft across two roadways. Largest arch of the bridge will soar 325ft above the ground and span 650ft across.
It will be the third largest pre-cast concrete segmental arch in the world, behind bridges in France and Australia.
The sustainable design of the bridge will unlock 55 acres beneath I-395, facilitating the creation of a linear park called the Heritage Trail. The park will feature historic figures, fountains, parks and mixed-use areas.
The project also includes the Heritage Trail, which will reconnect the Overtown community, which was divided 60 years ago due to the construction of the interstate.
It will also feature additional sustainability features to create a safer environment for pedestrians, cyclists and vehicular traffic.
HDR bridges and structures director Pat Hickox said: “This presents an extraordinary opportunity to transform Miami, not only its skyline with the soaring arches of a signature bridge, but also by reconnecting communities divided half a century ago.
“We are extremely pleased to be part of the Connecting Miami team to make this great project possible.”
Image: A rendering of the I-395 bridge. Photo: courtesy of Archer Western-de Moya Joint Venture.