Duck Key Bridge Updates
2/25 Update: The interim strengthening work on the Bimini Drive Bridge is progressing. The contractor has completed the demolition of a portion of the east bridge abutment and has installed rebar and forms in preparation for concrete pouring. Demolition of part of the west abutment and rebar installation is in progress and the contractor expects to complete concrete installation next week. Upon completion of the temporary strengthening work on the abutments, the contractor will fabricate and install the temporary supports for the bridge beams and deck.
AEB has submitted preliminary engineering plans and calculations for the interim projects on Harbor and Seaview bridges to the county’s engineer for review and approval. Due to challenges presented by the greater span length of both bridges the contractor is proposing to replace the existing concrete beams and deck with steel beams and a heavy timber deck rather than strengthen the existing concrete. The benefit of this approach will be the elimination of the weight restriction instead of keeping a 30-ton limit as was initially anticipated, as well as a reduction of future demolition costs when the full replacement of Harbor and Seaview bridges is undertaken. Coordination with utilities for relocations that will be needed has begun and communication with permitting agencies for the work at Harbor and Seaview is ongoing.
Project staff is evaluating alternatives for placing warning signs near the Seaview Bridge to alert boaters of the closure at Bimini Bridge before they travel down the canal.
American Empire Builders, Inc. has implemented the temporary one-lane/two-way traffic condition in accordance with Traffic Control Plans phase 1 at Bimini Bridge. Advanced Message Boards have been installed on-site. Traffic will remain on the existing south side of the bridge and will be controlled by a portable temporary signal 24 hours a day until the completion of this phase.
The Bimini Drive Bridge traffic signals are on a timer. All golf cart and pedestrian traffic are to obey the traffic signals in order to cross the bridge.
Utility Relocation - FKEC Work Status
Several new poles have been installed near the project area as well as underground contractor tasks are being completed that are required to be done prior to the new Bimini Drive Bridge.
- The temporary overhead tie line will be constructed Feb. 17-19, weather permitting.
- The associated system reconfigurations will follow, tentative to start Feb. 22.
- Underground contractor work going on north of the bridge and on Vista lane for the next week or two.
For questions, contact: Michael J Roberge, Director of Engineering, Florida Keys Electric Cooperative, Office: 305-852-1034, Cell: 231-675-8500.
- Bimini Drive Bridge: 10-ton weight limit
- Harbour Drive Bridge: 4-ton weight limit
- Seaview Bridge: 4-ton weight limit
The ratings for Harbour Drive and Seaview bridges are lower than the initial rapid analysis suggested. Signage has been replaced to notify residents and visitors of the change. County staff and design consultants are evaluating options to strengthen the two bridges for the interim period until the replacement of the bridges can take place. The County is providing weight certifications for Duck Key vehicles at the Long Key transfer station at no cost.
The strengthening of Harbour Drive and Seaview bridges will occur after the Bimini bridge strengthening is completed.