Change to Existing Approval - OPW11/0116.01

     PROPOSED CHANGE 1: EXTENSION OF TIME




It is noted that with the present programme, the permits presently would require works to be suspended on 1st June and
recommence restricted operations in August. This is primarily to minimise any potential impacts of the works on fish
migration and spawning within the Noosa River Estuary.

The potential impacts of the works on fish migration and spawning are primarily related to vibration and turbidity. Review of
this impact in the light of the present channel configuration reveals that:


     .    The north channel [within the protected Noosa River Fish Habitat Area) is presently open [Figure 2). This
          effectively provides an alternate, unimpacted fish access to the Noosa River estuary that is some distance from the
          proposed works. As such, the impact of any vibration or turbidity resulting from works undertaken during June and
          July will be substantially reduced given the overall improved accessibility of the estuary to fish.
     .    Closure of the southern channel (by construction of the submerged closure and the training wall / groyne) is
          effectively resulting in retention of the turbid plume within the southern channel [Figure 3) during lower tides. This
          would result in minimal impact of turbidity during any dredging for beach nourishment. During dredging for
          container filling, it is expected that the majority of the sediment is retained within the container and the turbid plume
          would also be reduced.

     .    Volume of dredging required within high current areas at the end of Noosa River Spit is substantially reduced by
          the proposed change to a rock profile and this will substantially reduce expected turbidity within the main channel.
          It is further expected that dredging of these areas will be completed prior to the sensitive June   -

                                                                                                               July period.
     .    Volume of dredging required in deeper areas (with finer material more likely to cause turbidity issues) is
          substantially reduced by the proposed chang to a rock profile and this will substantially redue expected turbidity
          within the main channel. It is further expected that dredging of these areas will be completed prior to the sensitive
          June July period.
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Figure 2: North Channel Providese alternate access away from the works