Skanska USA Civil Southeast, Inc. was awarded the $150-million contract to design and build the new Indian River Inlet Bridge which was constructed between July 2008 and January 2012.
The bridge is 2,600 feet long, and is supported by four 249-foot-tall pylon towers. The bridge roadway in each direction consists of two 12-foot-wide travel lanes, a 10-foot-wide outside shoulder, and a 4-foot- wide inside shoulder. Additionally, a 12-foot-wide sidewalk can be accessed from the ocean side of the bridge.
Construction consisted of:
- Pile driving - This underground support system consists of 293 concrete piles. Each pile is 36 x 36 inches square and averages 100 feet in length. These piles support the pylons, approach piers, and bridge abutments.
- Footer pours - Concrete footers were poured in place with each footer supporting the columns or pylons above them. Each of the four largest footers is 10 feet tall and is comprised of over 1000 cubic yards of concrete.
- Pylon erection - Each of the four pylons stands 249 feet tall and is hollow inside. The walls of the pylons vary from 18 to 30 inches in diameter.
- Falsework - This temporary steel-support-structure permitted the bridge deck to be built over land concurrent with pylon construction. Once stay cables were installed, the falsework supports were removed.
- Stay-cable installation - Over 3 million linear-feet, or 567 miles of cable strand was installed making up the 152 individual stay-cables.
- Form traveler - Two 300-ton temporary structures were used to construct the bridge deck over the inlet.