Reference Document - MCU24 0155 (As Published).pdf

DCM BUILDING DESIGN

18 SHEARWATER STREET, PEREGIAN BEACH – STORMWATER MANAGEMENT PLAN

CONTENTS
1            EXECUTIVE SUMMARY .................................................................................................... 5

2            INTRODUCTION ................................................................................................................ 6

    2.1      Existing Site Features ......................................................................................................... 6

    2.2      Legal Point of Discharge (LPOD) ....................................................................................... 8

    2.3      Flooding and Storm Surcharge ........................................................................................... 8

    2.4      Soil types ............................................................................................................................ 9

3            CATCHMENT ANALYSIS ................................................................................................. 10

    3.1      Rational Method ................................................................................................................ 10

             3.1.1       C10 Values for Impervious and Pervious Catchment Areas ............................... 10

             3.1.2       Time of Concentration .......................................................................................... 10

    3.2      Pre Development .............................................................................................................. 10

    3.3      Post Development............................................................................................................. 11

4            COUNCIL REQUIREMENTS FOR ALLOTMENT DRAINAGE ........................................ 13

5            CONCLUSIONS AND RECOMMENDATIONS ................................................................ 14

6            REFERENCES ................................................................................................................. 15

LIST OF TABLES
Table 1: Pre Development Catchment Information ...............................................................................10

Table 2: Pre Development Catchment Discharges Q ...........................................................................11

Table 3: Post Development Catchment Information .............................................................................12

Table 4: Post Development Catchment Discharges Q .........................................................................12

Table 5: Pre-development vs Post-development Comparison..............................................................14

LIST OF FIGURES
Figure 1: Site layout and Impervious Areas ............................................................................................7

Figure 2: View of Site from Shearwater Street ........................................................................................7

Figure 3: Legal Point of Discharge ..........................................................................................................8

Figure 4: Flood Inundation and Storm Tide map ....................................................................................8

Figure 5: Subject Site, Australian Soil Classification ..............................................................................9

Figure 6: Post Development Pervious Area ..........................................................................................11

APPENDICES
APPENDIX 1. – ARCHITECTURAL DRAWINGS


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