Attachment 6 - Stormwater Management Plan

 OPTION C - NEW EAST-WEST HES BASIN                                                                                       PIPED OUTLET - RL 12.1 (REQUIRES FROG FLAP AS
                                                                                                                          BELOW Q2 FLOOD LEVEL). DOWNSTREAM END OF                                                                                                                                                        LEGEND
                                                                                                                          PIPE RL 12.0 AND THEN DRAINAGE CHANNEL TO
                                                                                                                          CONVEY FLOWS OFF SITE. PIPED OUTLET COULD                                                                                                                                                                               EXISTING CONTOURS (0.5m)
                                                                                                                          BE RAISED ABOVE Q2 FLOOD EVENT, HOWEVER,
                                                                                                                          THIS WOULD REQUIRE ADDITIONAL PAD FILL. BASIN                                                                                                                                                                           CATCHMENT TO BASIN
FLOOD LEVELS PROVIDED BY NSC:
                                                                                                                          WILL STILL OPERATE WITH DECANTS BLOCKED -
Q1 - 12.43
                                                                                                                          REFER TO SMP REPORT
Q2 - 12.44
                                                                                                                                                                                                                                                                                                                                                  HES BASIN
Q10 - 12.51
                                                                                                                          SPILLWAY RL 13.3 (WELL ABOVE FLOOD LEVELS)
Q100 - 12.59
Q100 CC - 12.64                                                                                                                                                                                                                                                                                                                                   BIO BASIN
                                                                                X
                                                                              RL 11.5
                                                                                                                                                                                                                                                                                                                                                  FLOW DIRECTION

                                   X                                                                                                                                                                                                                                                                                                              EXISTING FLOWPATH
                                 RL 12.5
                                                                                                                                                             X                                                                                                                                                                                    CLEAN WATER DRAIN
                                                                                                                                                           RL 13.5
                                                                                                                                                                                                                                                                                                                                                  DIRTY WATER DRAIN
                                                                                                                                                                  INFLOW RL 13.90
        BASIN BASED ON A SETTLING DEPTH OF 1.2m. WIDER,
        LONGER BASIN COULD BE UTILISED (DASHED LINE) AND                                                                                                                                                                                                                                                                                          PROPERTY BOUNDARY
        WOULD REDUCE SETTLING DEPTH TO 0.9m AND INFLOW
        AND PAD LEVEL FILL BY 0.3m                                                                                                                                                                                                                                                                                                                ACTIVE AREA

                                                                                                                                                                                                                                                                                                                                                  AREA TO BE STABILISED

                                                                                                                                                                                                                                                                                                                                  X
                                                                                                                                                                                                X                                                                                                                                                 EXISTING SURFACE LEVEL
                                                                                        TO GET THIS PORTION OF THE PAD BACK TO THE                                                                                                                                                                                            RL 13.5
                                                                                        INLET, LEVELS WOULD BE ABOVE RL 14.0 (ABOVE                                                           RL 13.5
                                                                                        MINIMUM FLOOR LEVEL), AND LIKELY CLOSER TO RL
                                                                                        15.0 TO HAVE A DRAIN GRADING FLOW BACK


                                                                                                                                                   X                                                                                                                                                                                                  X

                                                                                                                                                 RL 13.5                                                                                                                                                                                            RL 14.0




                                                                                                                                                                                                                               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 - EAST-WEST 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-12C         E