07/1841 - Response to Information Request [As Published] · 132007.1841

STORMWATER MANAGEMENT PLAN

TABLE OF CONTENTS

 
  
 
 
 
 
  

1.0 INtrOdUCtiON ............csscssssssecsscsssorsnsssnsssserssccssssasessessesssesseassessesseansseseeseeassees 3
2.0 Existing Conditions ..........cccccceeee 3
3.0 Proposed Development................. 3
4.0 Site Stormwater Modelling.. we 4
4.1 Methodology. ..........ccccccecsseenseneeeee 4
4.2 Selection of Modelling Parameters.... 4
4.2.1 Impervious Areas.............:ceceeeee wd
4.2.2 Manning’s ‘Nn’... 5
4.2.3 Energy Loss Coefficients 0... cece csecsecseeeeeseseeseessaeseresseseeeeaees 5
4.2.4 Infiltration Characteristics 0... ce ecseeneetecseseeeeseesesesseceeseetetseraenees 5
5.0 Pre-Development Flows.......... 1 6
5.1 Rationale... 6
5.2 Result... ce 6
6.0 Post-Development Flows.. a7
6.1 Rationale... wT
B.2 RESUIRS..0.0....cccccccccceseseesceetecennenscescessececeeeeeeeaeeeseneneeeaeeneseesaeseeecaeeeseeaeeeteeens 7
7.0 CONCIUSION .......csesccsssstsccsssesesesssnssessnccsecsnssscssecsseseesessssesscrsesserennsnesessesessonsees 8
APPENDIX A,......cceeceseeeeee Proposed Development Layout
APPENDIX B........ceecceseeeee XP-STORM Pre-Development Results
APPENDIX C.,.....ceeceeeeeernes XP-STORM Post-Development Drainage Model Layout and
Results
APPENDIX D........cesreeeeeeer Preliminary Drainage Details

 

BARLOW GREGG VOM

M3048

DECEMBER 2007