The U.S. Army Corps of Engineers Jacksonville District awarded the second Jacksonville Harbor Deepening contract (Contract B) to Great Lakes Dredge & Dock Company, LLC, of Oak Brook, Illinois. The Corps awarded the base contract on September 24 in the amount of $113,167,400 with a total contract value of $209,813,750.
Contract B will deepen approximately 5 miles of the St. Johns River in addition to the ongoing deepening of Contract A, which covers approximately 3 miles from the entranceway inland. Contract B’s base funding will cover roughly 2.5 river miles of deepening, with the remainder of the funds provided in August 2019 to cover the additional 2.5 river miles.
Contract B includes dredging roughly 5.7 million cubic yards of material from River Mile 3 near the Naval Station Mayport runway, westerly to Mile 8 at the east tip of La Baron Island. This work does not involve blasting. The contractor will transport excavated material and place it in the Jacksonville Ocean Dredged Material Disposal Site located about six miles southeast of the entrance channel jetties. The contract includes the base, Mayport runway to Buck Island, and Option A from Buck Island to La Baron Island.
In addition to dredging, the work involves turbidity/sedimentation monitoring (pre- and during construction environmental monitoring for direct and indirect effects associated with construction activities), endangered species and marine life observers.
Contract B is the second of multiple construction contracts that will deepen the existing federal navigation channel from its current authorized depth of 40 feet to 47 feet. Contract work will also widen specific areas for two-way traffic and turning, and also provide some advance channel maintenance.
“This project’s success is actually a combined collaboration of federal, state and local partners working closely together to meet regional and national needs, as well as future population growth. We value our continued partnership with the Jacksonville Port Authority, the City of Jacksonville, and the State of Florida,” Project Manager Jason Harrah said.
Construction is expected to start in late December, and the estimated time of construction is roughly five years (1,010 days).
In accordance with the executed project partnership agreement, the total cost of the authorized project is $704.5 million; the federal share is $337.8 million and the non-federal share is $366.7 million.