STP22-0347 DA Engineering Report RFI Response Rev C

                                                                                                                                               STP CONSULTANTS




Contents
1.     Introduction ........................................................................................................................................................3
2.     Site Description ..................................................................................................................................................3
     2.1      Easements..................................................................................................................................................3
     2.2      Proposed Development .............................................................................................................................4
3.     Stormwater Management Plan .........................................................................................................................5
     3.1      Flood Studies..............................................................................................................................................5
     3.2      Stormwater Detention................................................................................................................................5
     3.3      Stormwater Quality ....................................................................................................................................5
     3.4      Existing Stormwater Infrastructure...........................................................................................................5
     3.5      Site Stormwater Drainage .........................................................................................................................5
     3.6      Site Earthworks ..........................................................................................................................................5
4.     Water Supply and Sewerage............................................................................................................................10
     4.1      Water Connection ....................................................................................................................................10
     4.2      Sewer Connection....................................................................................................................................10
5.     Roadworks and Traffic Impact........................................................................................................................11
     5.1      Parking and Access .................................................................................................................................11
     5.2      Proposed Fire track & Construction Access ..........................................................................................11
6.     Conclusions ......................................................................................................................................................11
7.     Appendix A – Schematic Layouts ...................................................................................................................12
8.     Appendix B – Typical Access Track Crossing................................................................................................17
9.     Appendix C – Stormwater Quality Management Plan ...................................................................................20
     9.1      Pollutants of Concern..............................................................................................................................21
     9.2      Design Objectives for Water Management ............................................................................................21
     9.3      Proposed Stormwater Treatment Train Analysis ..................................................................................22
     9.4      Music Modelling.......................................................................................................................................22
              Model Parameters....................................................................................................................................22
              Rainfall & Runoff Parameters ..................................................................................................................23
              Pollutant Generation ................................................................................................................................23
              Results ......................................................................................................................................................23




Civil Engineering Report & Site Based Stormwater Management Plan | STP22-0347                                                                                           2