Change to Existing Approval - OPW11/0116.01

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Figure 6: Proposed Rock Wall Cross Section


A review of original risk assessment has been undertaken to highlight any changes in the expected impacts associated with
the works.


Uncertainty

The proposed change to rock along a section of the structure will not substantially impact on the level of uncertainty and
monitoring is still required.

Variability in shoreline response

No change to expected variability along Dog Beach.


Channel Evolution I River Processes


The impacts of the proposed structure on river flows and river I shoreline evolution is expected to be equivalent to the
existing approved mega-container profile. While there is higher friction associated with permeable structures, previous
changes to these factors as part of the modelling did not reveal any significant impacts. As such, the increase in wall
permeability is not expected to have a noticeable change on river flows or channel evolution.




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