Attachment 6 - Stormwater Management Plan

OPTION B - NEW NORTH-SOUTH HES BASIN                                                                FLOOD LEVELS PROVIDED BY NSC:
                                                                                                    Q1 - 12.43                                                                                                                                                                                                        LEGEND
                                                                                                    Q2 - 12.44
                                                                                                    Q10 - 12.51                                                                                                                                                                                                                               EXISTING CONTOURS (0.5m)
                                                                                                    Q100 - 12.59
                                                                                                    Q100 CC - 12.64                                                                                                                                                                                                                           CATCHMENT TO BASIN

                                                                                                    PIPED OUTLET - RL 12.1 (REQUIRES FROG FLAP AS
                                                                                                    BELOW Q2 FLOOD LEVEL). DOWNSTREAM END OF                                                                                                                                                                                                  HES BASIN
                                                                                                    PIPE RL 12.0 AND THEN DRAINAGE CHANNEL TO
                                                                                                    CONVEY FLOWS OFF SITE. PIPED OUTLET COULD
                                                                    X                                                                                                                                                                                                                                                                         BIO BASIN
                                                                                                    BE RAISED ABOVE Q2 FLOOD EVENT, HOWEVER,
                                                                  RL 11.5                           THIS WOULD REQUIRE ADDITIONAL PAD FILL. BASIN
                                                                                                    WILL STILL OPERATE WITH DECANTS BLOCKED -                                                                                                                                                                                                 FLOW DIRECTION
                                                                                                    REFER TO SMP REPORT
                        X                                                                                                                                                                                                                                                                                                                     EXISTING FLOWPATH
                                                                                                    SPILLWAY RL 13.3 (WELL ABOVE FLOOD LEVELS)
                      RL 12.5
                                                                            BASIN BASED ON A SETTLING DEPTH OF 1.2m. WIDER,                           X                                                                                                                                                                                       CLEAN WATER DRAIN
                                                                            LONGER BASIN COULD BE UTILISED (DASHED LINE) AND
                                                                            WOULD REDUCE SETTLING DEPTH TO 0.9m AND INFLOW                          RL 13.5
                                                                                                                                                                                                                                                                                                                                              DIRTY WATER DRAIN
                                                                            AND PAD LEVEL FILL BY 0.3m

                                                                                                                                                                                                                                                                                                                                              PROPERTY BOUNDARY
                                                                             TO GET THIS PORTION OF THE PAD BACK TO THE
                                                                             INLET, LEVELS WOULD BE ABOVE RL 14.0 (ABOVE                                                                                                                                                                                                                      ACTIVE AREA
                                                                             MINIMUM FLOOR LEVEL), AND LIKELY CLOSER TO RL
                                                                             15.0 TO HAVE A DRAIN GRADING FLOW BACK
                                                                                                                                                                                                                                                                                                                                              AREA TO BE STABILISED

                                                                                                                                                                                                                                                                                                                              X
                                                                                                                                                                                            X                                                                                                                                                 EXISTING SURFACE LEVEL
                                                                                                                                                                                                                                                                                                                          RL 13.5
                                                                                                                                                                                          RL 13.5




                                                                                                                                          X                                                                                                                                                                                                       X

                                                                                                                                        RL 13.5                                                                                                                                                                                                 RL 14.0




                                           INFLOW RL 13.90


                                                                                                                                                                                                                           X
                                                                                                                                                                                                                        RL 14.0
                                                                                                                                                                                                                                                                                    X
                                                                                                                                                                                                                                                                                 RL 15.0



                                                 DRAINAGE AND PAD LEVELS TO BE                                     X
                                                 MODIFIED TO ACHIEVE INFLOW LEVEL OF
                                                                                                                 RL 14.0
              X                                  NEW BASIN. WHERE DRAINS ARE USED,
                                                 PAD LEVEL LIKELY TO BE RL 15 OR HIGHER
            RL 15.0

                                                                                                                                                                           X
                                                                                                                                                                         RL 14.0
                                                         X
                                                      RL 14.0




                                                                                                                                                                                                                       X
                                                                                                                                                                                                                     RL 17.0




                                                                                                                                                                                                                                                                CLIENT                                              PROJECT
                                   D       CELL NUMBER REVISION                                                              KR        20/09/21                 0                    20                                               COPYRIGHT C                               NOOSA SHIRE COUNCIL                  NOOSA LANDFILL STORMWATER MANAGEMENT PLAN
                                   C       FINAL DESIGN REPORT                                                               KR        03/06/21                                                                                   TOPO GROUP PTY LTD
                                                                                                                                                                                                                                                                DRAWN                   DESIGNED      DATE          DRAWING TITLE
                                   B       NEW ATC DESIGN                                                                    KR        12/04/21
                                                                                                                                                                      SCALE 1:1000                                         THIS DOCUMENT MAY NOT BE COPIED OR            KR                      KR      31/03/21                    STORMWATER MANAGEMENT - NORTH
                                                                                                                                                                                                    ISSUED FOR USE         TRANSMITTED IN ANY FORM OR BY ANY
                                   E       REVISION TO NORTH OPTIONS                                                         KR        10/12/21                                                                            MEANS IN PART OR IN WHOLE WITHOUT
                                                                                                                                                                                                                                                                RPEQ / SIGNATURE (IF REQUIRED)                                        PAD OPTION - NORTH-SOUTH BASIN
                                                                                                                                                              NORTH
                                                                                                                                                                                     A3                                    THE WRITTEN CONSENT OF TOPO GROUP                CPESC - 5395, RPEQ - 15954              PROJECT No                        DRAWING No         REVISION
                                REVISION   DESCRIPTION                                                                 APPROVED BY     DATE                                                                                              PTY LTD.                                                                                   20-0211                CONCEPT-12B        E