Stormwater Management Plan · MCU15/0122

                                                                                             15099 - SBSMP/2
                                                                                                          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 ........................................................................ 7
  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