Project Overview
The Jupiter Federal Bascule Bridge Replacement project involved demolishing the existing bridge and constructing a new four-leaf bascule bridge over the Loxahatchee River in Jupiter, Florida. The project provides a modern, reliable crossing while maintaining navigation access and included construction of deep foundations for in-water piers, approach end bents, bulkhead walls, and a pedestrian observation deck.
The completed bridge features four movable bascule leaves supported by deep marine foundations driven into the sandy subsurface below the river. Located adjacent to the historic Jupiter Inlet Lighthouse Museum and less than one mile from the Jupiter Inlet, the project required careful coordination around existing traffic, nearby businesses and residences, environmentally sensitive seagrass habitats, and protected historic structures.
Despite a demanding schedule, the project team successfully completed the work while implementing extensive environmental and vibration-control measures. Turbidity curtains, vibration monitoring, and protective systems for historic structures minimized impacts to the surrounding community and waterways while ensuring compliance with strict environmental requirements.
Precast Solution
Prestressed precast concrete piles were selected for the bridge foundation because they provided the strength, durability, and constructability needed for the marine environment and sandy soil conditions. Their resistance to corrosion and long-term deterioration, combined with consistent factory-controlled quality, made them an efficient and reliable solution that supported the project's accelerated schedule. The driven pile system also allowed installation methods to be adapted in areas with sensitive infrastructure and vibration concerns.
The precast scope included the manufacture, delivery, and installation of approximately 267 prestressed concrete piles. This included about 250 thirty-inch square piles for the bridge foundations, 11 twenty-four-inch square piles for bulkhead wall tiebacks, and 6 eighteen-inch square piles supporting a pedestrian observation deck. These piles formed the primary foundation system for the new bridge.
To minimize impacts on nearby homes, businesses, the existing bridge, and the historic Jupiter Inlet Lighthouse Museum, many pile locations were preformed prior to driving. All thirty-inch in-water piles were preformed to minimum tip elevation, and variable-moment vibratory hammers were used in vibration-sensitive areas. These measures allowed the project team to successfully install the foundation system while meeting environmental requirements, protecting historic resources, and maintaining the project schedule. |