App B - Swmp

LINDSAY CONSULTING PTY LTD- STRUCTURAL AND CIVIL ENGINEERS
ACN 079 744 808 ABN 61 478 386 385 GST REGISTERED, AS TRUSTEE FOR THE LINDSAY FAMILY TRUST


                    DESIGN STORM               NON-WORSENING                     ROOF AND
                  RETURN INTERVAL                 VOLUME FOR                    DRIVEWAY
                           (AER)                    STORM (m3)                 VOLUME FOR
                                                                           DESIGN STORM (m3)
                            63%                              3                         8
                            50%                              3                        10
                            20%                              4                        15
                            10%                              5                        19
                            5%                               6                        23
                            2%                               8                        29
                            1%                               9                        33


       3.      ROOFWATER DETENTION


                In relation to the minimization of the runoff from the site Lindsay Consulting Pty Ltd
                have adopted a non-worsening arrangement for the detention based on the entire site,
                based on the 0.01 AEP flow from the 5 minute storm. Based on the non-worsening
                volume of 9000 lt a 10000 lt detention tank has been adopted for the site, with the tank
                located under the visitor carpark at the front of the development, allowing for gravity
                flow to the street from the overflow weir.


                The flow off the site is to be limited to the 63% AEP pre-developed flow rate, as
                determined in Appendix A, and as shown in the table above. The flow has been limited
                using a 30 mm Dia low flow pipe in the detention tank weir with the weir overflow level
                set at the 0.01 AEP storm volume.


                Drawing 24-0771-D1 to D13 details the proposed water detention tank for the project,
                which has been changed to a inground series of interconnected pipes.


       4.      TRAFFIC MANAGMEENT PLAN (TMCP)


                A traffic management plan shall be as per a future detail with the site access limited to
                the rumble strip as shown on the engineering drawing.




REF: 240771                                          3                         20 August 2025