SURVEY DRY TRANSPORT SF DRY DOCK #1
Project Summary
To transport the old and decommsioned San Francisco Dry Dock #1 from San Francisco to a scrapyard in China, the Dockwise owned and operated semi-submersible heavy-lift ship TERN was used. The 408 ft long dry dock was surveyed and its residual strenght assessed. Dry transport was deemed feasibile on the TERN with its 415 ft long cargo deck. Late October 2014, the dry dock was towed from its storage berth at the Port of San Francisco with 4 local tugs and floated over the submersed TERN at the nearby deep water anchorage. After careful positioning of the dry dock, the TERN was deballasted and the dry dock lifted out of the water. The cribbing was inspected and the seafastening operation started. After final inspection of all the seafastenings, the transport approval certificate was issued and the TERN departed with destination Zhoushan, China.
Scope of Work
The project scope included:
Project Photographs
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specialists in marine heavy-lift transportation engineering
naval architects
marine surveyors
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Est. 1992
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Survey the dry dock and review the tow preparations;
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Review the Dockwise prepared CSM (Cargo Securing Manual);
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Survey the assist tugs to be used for the wet tow and float-over operation;
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Check cribbing arrangement as laid out on heavy-ship deck;
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Attend wet tow and loading operation of the dry dock onto the TERN;
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Survey the seafastening installation;
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Issue transport approval certificate after final inspection.
The loaded TERN anchored in the San Francisco Bay
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Cribbing on cargo deck |
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Connecting assist tug |
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Floating dry dock over TERN |
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Drydock on cribbing |