PART Response to Information Request · 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 6-1: Drawina List
       Drawing No                   Rev No               Date                                        Title

 1105-155C-01-01                        A             Dec 2011            Site Layout
                                                                         Proposed Stormwater Treatment Device
 1105-155C-01-02                        C             Jan 2012
                                                                         Details & Layout
                                                                         Proposed Pipe Routing and Catchment
 1105-155C-01-03                        C             Dec 2011
                                                                         Areas
                                                                         Bio-Retention Basin Layout and
 1105-155C-01-04                        C             Jan 2012
                                                                         Construction Details
                                                                         Bio-retention Basin Cross-Section and
1105-155C-01-05                         C             Jan 2012
                                                                         Construction Details
                                                                         Proposed Stormwater Treatment Train
1105-155C-01-06                         A             Jan 2012
                                                                         Details
                                                                         Erosion and Sediment Control Plan
1105-155C-01-07                         A             Dec 2011
                                                                         (ESCP) - Full Development
                                                                         Erosion and Sediment Control Plan
1105-1550-01-08                         A             Dec 2011
                                                                         (ESCP) - Sta g e I Develo pment

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 will capture and hold stormwater in Rainwater Tanks and on the land, with held
rainwater being used for domestic purposes within the residential complex, or for irrigating the
gardens to ensure stable ground cover. Stable ground cover is an important feature of erosion
risk management. Overflow from the rainwater storage 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 Ltd                         Contrast Constructions                           J-1005-310 - 13 January 2012
I:\CLIENTFILES\Contrast Constructions\1108-155c - Essence of Peregian SCEP Stage 1 Update 09_output Documents\1108.155C_SWMP
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