Response to Information Request - Received on 19/04/2012 · OPW11/0335

6.0        STORMWATER MANAGEMENT PLAN


The attached plans in Appendix A show the location of key features of the Essence of Peregian
SWMP, and the proposed control measures to manage stormwater across the developed site.
A list of these plans is provided in Table 6-1.


Table 61 Drawlng L.
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       Drawing No                  ’Rev No                    Date              ..,i>
                                                                                           ’"
                                                                                                    r’       Title
                                                                                                                                          ’:~:

1105-155C-01-01                         A                  Dec 2011          Site Layout


                                        C                  Jan 2012
                                                                             Proposed Stormwater Treatment Device
11 05-155C-01-02
                                                                             Details & Lavout

11 05-155C-01-03                        C                  Dec 2011
                                                                             Proposed Pipe Routing and Catchment
                                                                             Areas
                                                                             Bio-Retention Trench Layout and
11 05-155C-01-04                        C                  Jan 2012
                                                                             Construction Details
                                                                             Bio-retention Trench Cross-Section and
11 05-155C-01-05                        C                  Jan 2012
                                                                             Construction Details

11 05-155C-01-06                        A                  Jan 2012
                                                                             Proposed Stormwater Treatment Train
                                                                             Details
                                                                             Erosion and Sediment Control Plan
11 05-155C-01-07                        A                  Dec 2011
                                                                             (ESCP) Full Development
                                                                                                -




                                                                             Erosion and Sediment Control Plan
11 05-155C-01-08                        A                  Dec 2011
                                                                             (ESCP) Stage 1 Development
                                                                                                -




The Site Location (Drawing 01) shows site boundaries of the Essence of Peregian in relation to
the Noosa National Park to the west, and urban development to the north, south and east.
                                            \

The Essence of Peregian development will install water sensitive urban design features. These
features willcapture and hold stormwater In Rainwater Tanks and on the land, with held
rainwater being used for domestic p_urposes within the residential complex, or for irrigating the
gardens to ensure stable ground cover., Stable ground cover is’~n important feature of erosion
risk management. Overflow from the rainwater ’st rage tanks will be directed to the site bio-
retention trenches.


Stormwater will be piped directly into Bio-retention Trenches, (Drawing 03 & Drawing 04) which
are   depression storages designed to impede water flow. These features will be installed within
fill platforms placed over the existing landscape. The beds will be installed at between 3.0                                                         -




3.5m, which is above the 100 year ARI flood level identified for the nearby Lake Weyba (RL
2.05m AHD) (Brown,2007). After passing through the Bio-retention trenches, stormwater will
flow into the existing heath wetland on the site, (Drawing 05 & 06) which will act as a buffer to
the national park.


Overland flow will be diverted, via catch drains into the bio-retention trenches (Drawing 06), for
treatment.


The    development site does not fall within the flood hazard area nominated by the Noosa
Council (Brown,2007). The stormwater treatment train is designed to accommodate the most
intense stormwater event encountered during a 5 year interval described by the ARI records
(202 mm/hour over a 5 minute period) (Australian Government, Bureau of Meteorology).




@2012 Simmonds & Bristow Pty LId                            Contrast Constructions                              J-1 005-31 0   -
                                                                                                                                   22 March 2012
1:\CLlENTFILES\Conlrasl Conslrudions\1108-155c   -
                                                     Essence of Peregian SCEP Slage 1 Updale\09_Oulpul Documenls\1108-155C_SWMP
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