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Browse LNG Precinct - Public Information Booklet - Department of ...

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<strong>Public</strong> <strong>Information</strong> <strong>Booklet</strong><br />

Figure 33: Jetty construction<br />

Question ñ How big will the breakwater be and what will it be made from?<br />

The marine concepts are not yet finalised and are dependent on the selected site and<br />

ocean conditions at that location. However, based on the information that has been<br />

collected there is likelihood for a breakwater to protect the <strong>LNG</strong> loading berth. This<br />

breakwater is expected to be in approximately 12 to15 metres (13 to 16 yards) <strong>of</strong> water<br />

depth. The length and orientation <strong>of</strong> the breakwater will be governed by the site location<br />

and marine facilities layout (including jetty, channel etc). No decision has been made on<br />

the type <strong>of</strong> breakwater.<br />

Studies have identified a shortage <strong>of</strong> suitable breakwater armour rock in the region, and a<br />

preference to use a prefabricated concrete caisson breakwater, eliminating the need for<br />

armour rock. A caisson is a large concrete block (built by connecting multiple large<br />

concrete cylinders) that can be floated into place and sunk onto the seabed. A series <strong>of</strong><br />

these when combined together and when completed will be similar size to a rock type<br />

breakwater.<br />

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