LATE RFI - SCG 33114 (SWM) Rev A

Table of Contents
1.0       INTRODUCTION ................................................................................................................................... 2
2.0       EXISTING SITE DESCRIPTION ......................................................................................................... 3
3.0       PROPOSED DEVELOPMENT ............................................................................................................. 4
4.0       EXISTING DRAINAGE.......................................................................................................................... 5
   4.1        Existing Drainage and Infrastructure .................................................................................................... 5
   4.2        Lawful Point of Discharge ........................................................................................................................... 5
5.0       STORMWATER QUALITY .................................................................................................................. 7
   5.1        State Planning Policy and Water by Design Assessment ................................................................. 7
   5.2        Construction Phase ....................................................................................................................................... 7
      5.2.1       Silt and Sediment Erosion ...................................................................................................................................... 7
   5.3        Completed Development............................................................................................................................. 9
6.0       STORMWATER QUANTITY ............................................................................................................ 11
   6.1        Drains Analysis ............................................................................................................................................ 11
      6.1.1       Existing Catchments .............................................................................................................................................. 12
      6.1.2       Proposed Site ............................................................................................................................................................ 12
      6.1.3       Peak Flow Comparison ......................................................................................................................................... 13
      6.1.3       Peak Flow Mitigation (OSD) ............................................................................................................................... 13
   6.2        Proposed Drainage .................................................................................................................................... 15
7.0       FLOODING ........................................................................................................................................... 16
8.0       CONCULSION ...................................................................................................................................... 17
APPENDIX A – Detailed Site Survey ........................................................................................................ 18
APPENDIX B – Noosa Council Drainage Infrastructure ................................................................... 19
APPENDIX C – Proposed Development Plans ...................................................................................... 20
APPENDIX D – Concept Stormwater Management Plan .................................................................. 21




SCG Consulting Engineers                                                  Page 1                                                                     SCG Ref: 33114(SWMP)