Appendix C - Engineering Report

6.2   Flooding


The attached Flood Map (Appendix C) indicates that the site is not subject to inundation
by current or future extreme flood events. It is noted that the existing flood inundation
extent is located at the eastern boundary of the site and is generally confined to the
Reserve Street road corridor.


All allotments will be provided with appropriate freeboard to maximum water levels in
accordance with Noosa Shire Council’s (NSC) Planning Scheme Policy.



6.3   Stormwater Quantity Management


Refer to Engineering Drawing C6361/22/P05 and P07-08 attached as Appendix B for
details of proposed stormwater drainage.


Development works within the subject site will increase the total impervious percentage
of the northern and southern catchments from 0% to 10% and 0% to 40% respectively.
The total Time of Concentration (TOC) will remain similar in the developed case due to
upstream contributing catchments.


When considered as part of the total catchments contributing stormwater runoff to the
northern and southern flow paths, these changes will increase the total impervious
percentage from 0% to 6% and 0% to 2.8% (respectively). These changes to catchment
drainage characteristics will result in minor increases to peak discharge at the northern
and southern legal points of discharge.




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