Reference Documents - MCU23-0142

Table of Contents
STORMWATER MANAGEMENT PLAN
STORM WATER MANAGEMENT PLAN............................................................................................ 1
Table of Contents ....................................................................................................................... 3
1.0       INTRODUCTION: ............................................................................................................. 4
2.0       EXISTING SITE DESCRIPTION: ......................................................................................... 4
3.0       PROPOSED DEVELOPMENT:.............................................................................................. 5
4.0       EXISTING DRAINAGE: ...................................................................................................... 6
   4.1        Existing Drainage and Infrastructure: ............................................................................. 6
   4.2        Lawful Point of Discharge: ............................................................................................ 6
5.0       STORMWATER QUALITY: ................................................................................................. 7
   5.1        State Planning Policy Assessment .................................................................................. 7
   5.2        Construction Phase ...................................................................................................... 8
   5.3        Operational Phase ....................................................................................................... 8
      5.3.1      Water Quality Objectives ...................................................................................................................8
      5.3.2      Proposed Treatment Measures .........................................................................................................8
      5.3.3      Pollutant Modelling ...........................................................................................................................9
      5.3.4      Proposed Treatment Train.................................................................................................................9
6.0       STORMWATER QUANTITY: ............................................................................................. 11
   6.1        Drains Analysis ........................................................................................................... 12
      6.1.1      Existing Catchments .........................................................................................................................12
      6.1.2      Peak Flows .......................................................................................................................................12
      6.1.3      Peak Flow Mitigation (OSD) .............................................................................................................13
   6.2        Proposed Drainage: .................................................................................................... 15
   6.3        Manage Allotment and Cross Allotment Flows: .............................................................. 15
   6.4        Climate Change Consideration for Year 2100 ................................................................ 16
7.0       FLOODING .................................................................................................................... 16
8.0       CONCLUSION ................................................................................................................ 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
APPENDIX E              NOOSA COUNCIL FLOOD CERTIFICATE ............................................................. 22




 SCG Consulting engineers                                                         3                                    SCG Ref: 33094(SWM).Rev A