Approvals Application Supporting Material · MCU26/0084

                                              Noosa Harbour & Las Rias Foreshore Management Works
                                                OFFICIAL



From these sites, material would then be loaded to marine barges and progressively delivered to the
site for unloading and placement by excavators. These parks both have sloping foreshore access and
would not require the use of any temporary structures (e.g. marine offloading facilities, pontoons),
although beach access matting may be used to reduce potential erosion risks. The location of these
stockpiling areas is shown in Figure 2.5 and included in the accompanying design pack. Following
completion of all works, the contractor for the works would be required to ‘make good’ any disturbance
in these parks to the satisfaction of Council, subject to relevant management arrangements.

All construction works on the foreshore of the site would involve excavators and similar plant.

2.3.3 Sand Sourcing and Groyne Construction                                                                   Commented [JV3]: @Daniel Wishaw /@Verity Taylor -
Following completion of the revetment wall repair, sand sourcing and groyne construction works will           please include the surface area and associated volume
                                                                                                              for the sand shoals
proceed in parallel. This will involve dredging sand from the sandbank immediately north of the Noosa
River channel with a cutter suction dredge, with material then hydraulically pumped back to the site and
directly into the geosynthetic containers. These containers will be placed in the configuration of the
groyne, with additional layers added as the base layers are completed. Excess water from the dredging
will filter through the bags and back to the Noosa River.

Once the groynes are completed, additional sand will be dredged and pumped to bury the revetment
wall and groynes and achieve the design beach profile. This will involve some support from an
excavator to ensure appropriate profile is met. Excess water from this placement will flow back to the
Noosa River.

The location identified for sand sourcing is shown in Figure 2.4 and in the detailed design plans
accompanying this application. This site has been chosen as it immediately adjoins the main channel
and therefore can be dredged in a way that does not cause change in local hydrodynamic conditions.
Dredging would occur across the footprint to a maximum depth of 1m to ensure only sand is targeted.
The footprint shown is currently 7,055m2 with a total capacity of 7,055m3 if cut to a 1m depth, well in
excess of the sand requirements for the project.

Pumping of sand will require the use of pipelines from the dredging area to the site. To avoid
navigational safety risks, the pipeline will be sunk under the channel. Due to the proximity of the
dredging area to the site, booster pumps are unlikely to be required.

Following completion of dredging works, the dredge vessel and associated pipe will be demobilised. All
land-based plant and site equipment will also be demobilised.

2.4 Maintenance Works
Sand placed during the works is expected to naturally erode over time back into the river channel. To
allow for ongoing burial of the revetment and groynes, therefore, further sand sourcing and placement
would be required. This would be undertaken subject to existing approvals for dredging and
nourishment in the area (i.e. Development permit IPDE01304708 and EA EPPR00197213). Therefore,
future maintenance works are not required to be included in the scope of the current approval, with
dredging volumes of up to 5,000 tonnes of sand material to be excavated within the sandbank adjacent
to the foreshore area and broader Noosa River channel (See Section 4.1).




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