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Design/Build Services

he first phase of the managed mooring field for the
City of Sarasota opened in August, 2012 with 35 of
the permitted 109 moorings installed. The mooring
field is designed to help remove derelict vessels
from the waterways, and the mooring field also includes
upland amenities such as a store, laundry facilities, dockmaster office, showers, and sewage pump-out facilities. The mooring field is part of a pilot program initiated by the Florida Fish and Wildlife Conservation Commission (FWC) along with an anchorage ordinance that prohibits vessels anchoring outside of the mooring field for more than 90 days.
Complex and variable soil conditions necessitated a designbuild approach to implement Phase 1 of the mooring field. The City selected a design-build team to complete the project. The design-build team was led by Dock & Marine as the marine contractor, and the team included Coastal Systems as engineers with American Underwater Contractors as the mooring subcontractor.
The design-build approach accounted for the team's combined
1) experience with marine foundations,
2) understanding of
coastal processes (wind/wave/currents),
3) mooring design/ construction experience, and
4) optimized construction equipment profile.

Coastal Systems selected a "stake" pile foundation system
consisting of steel H beams of varying lengths and sizes based on the soil conditions and mooring loads from the design vessels. Construction plans and technical specifications were prepared to account for the environmental conditions, and these plans were approved by the City prior to construction.
During construction, stake piles were precisely positioned with marine surveying methods, and the piles were driven
underwater into the seabed with a specialized vibratory
hammer system. Each pile was tested and approved by the
City prior to installation of the mooring system to ensure the pile foundation achieved the required design loads.
The mooring system consisted of a Stormsoft downline with
appropriate mooring hardware, buoy and pennant. The
mooring systems specified is proven technology in Florida and will provide the City an engineered system with a long service life. The design-build project, including preparation and approvals of the design, was completed within three months of the City's Notice-to-Proceed. Coastal Systems also completed the permit compliance documentation and provided as-built surveys to the agencies with jurisdiction on the project including FWC, Florida DEP, and the U.S. Army Corps of Engineers.

In 2013, the design-build team was awarded the contract to construct the remainder of the mooring field. Seventy-four H-pile anchors were installed while the crane barge was mobilized. An additional 35 downlines were installed, and the remaining downlines will be installed by the City at a later date. In addition, the design-build team installed regulatory marker signs in accordance with the FWC permits.

Download a printable PDF version of this project
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