Stormwater Management Plan · MCU15/0122

                                                                                              15099 - SBSMP/3
                                                                                                            Page 2




                                           Table of Contents
1   INTRODUCTION ............................................................................................ 3
2   Existing site conditions .................................................................................. 4
  2.1    The Site ............................................................................................... 4
  2.2    Surrounding Area .................................................................................... 4
3 PROPOSED DEVELOPMENT ............................................................................... 5
4 EXISTING STORMWATER DRAINAGE SYSTEM........................................................... 6
  4.1    Existing Infrastructure .............................................................................. 6
  4.2    Existing Drainage Patterns ......................................................................... 6
  4.3    Legal Point of Discharge ........................................................................... 7
5 STORMWATER QUANTITY ................................................................................ 8
  5.1    Design Storms ........................................................................................ 8
  5.2    Rainfall Intensity .................................................................................... 8
  5.3    Times of Concentration ............................................................................ 8
  5.4    Runoff Coefficients ................................................................................. 8
  5.5    Peak Flows ........................................................................................... 9
  5.6    On-Site Detention Analysis......................................................................... 9
  5.7    Comparison of Peak Flows at the Legal Point of Discharge ................................. 14
6 STORMWATER QUALITY ................................................................................. 15
  6.1    Construction Phase................................................................................. 15
  6.2    Operational Phase .................................................................................. 17
7 FLOODING ................................................................................................. 23
8 CONCLUSION .............................................................................................. 24
Appendix A DETAILED SITE SURVEY ......................................................................... 25
Appendix B PROPOSED DEVELOPMENT PLANS ............................................................. 26
Appendix C CONCEPT DRAINAGE PLANS ................................................................... 27
Appendix D XP-RAFTS PRE-DEVELOPMENT HYDROGRAPHS.............................................. 28
Appendix E XP-RAFTS POST-DEVELOPMENT MITIGATED HYDROGRAPHS .............................. 29
Appendix F RATIONAL METHOD CALCULATIONS .......................................................... 30
Appendix G NOOSAVILLE FLOOD OVERLAY MAPPING .................................................... 31




Site Based Stormwater Management Plan
Proposed Medical Development at Cnr Val Crescent & Goodchap Street, Noosaville