Attachment 3 - Revised Engineering Report (rec. 7.04.2025) MCU24-0165 & OPW24-0222

                                                                                                                                                                                                                                                                                                                                                                                                     POOL FENCE TO OR EQUIVALENT
                                                                                                                                                                                                                                                                                                                                                                                                     TO BIO-BASIN EDGE TYPICAL
                                                                                                                                                                                                                                                                                             VEHICLE BOLLARDS




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            RP BDY
                                                                                                                                                                                                                                                                                DESIGN SURFACE
                                                                                                                                                                                                                                                                                                                                                                                            3.00
                                                                                                                                                                                                                                                                                    FALL                                     RL 90.47                                                                                                                                       FALL
                                                                                                                                                                                                                                                                                                                                                                                               RL 90.13

                                                                                                                                                                                                                                                                                                                                                      RL 89.73




                                                                                                                                                                                                                                                                                                                                                                                                                               1.14
                                                                                                                                                                                                                                                                                                                                                                                                                                                                          EXISTING SURFACE
                                                                                                                                                                                                                                                                         INLET PIPE
                                                                                                                                                                                                                                                                                                                                                      RL 88.89


                                                                                                                                                                                                                                                               CORE FILLED BLOCK RETAINING WALL                                           CONCRETE FOREBAY & ROCK                                                                                                  1.50
                                                                                                                                                                                                                                                               TO BASIN WHERE SPECIFIED TYPICAL                                           GENERALLY IN ACCORDANCE WITH
                                                                                                                                                                                                                                                                                                                                          IPWEA STD DRG DS-075


                                                                                                                                                                                                                                                                              RETAINING WALL DEPTH TO
                                                                                                                                                                                                                                                                              EXTEND FOR FILTER MEDIA
                                                                                                                                                                                                                                                                                                                                                    SECTION                                 C
                                                                                                                                                                                                                                                                                                                                                    SCALE 1:50                              301

                                                                                                                                                                                                                                                                                                                                                                                                                                             EXISTING SEWER MAIN




                                                                                                                                                                                                                                                                                                                           MAKE GOOD ALL AREAS DISTERBED BY
                                                                                                                                                                                                                                                                                                                           CONSTRUCTION ACTIVITIES AS PER LANDSCAPE
                                                                                                                                                                                                                                                                                                                           DESIGN OTHERWISE TOPSOIL & TURF


                                                                                                                                                                                                                                                                                                                INSTALL GROUTED RICK PROTECTION                                                                                                              GROUTED ROCK WEIR OVERFLOW                                                                                     DESIGN SURFACE




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               RP BDY
                                                                                                                                                                                                                                                                                                                AROUND SIDES/BACK OF HEADWALL
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 FALL
                                                                                                                                                                               RIFLE STREET
                                                                                                                                                                                                                                                                                                                1% AEP(CC) RL 90.30                                                                                                                           EXISTING SURFACE
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           INLET

                                                                                                                                                                                                                                                                                                                  INSTALL FLAP GATE FOR
                                                                                                                                                                                                                                                               CONTRACTOR TO MAKE GOOD                            BACKFLOW PREVENTION
                                                                                                                                                                                                                                                               FOR ANY CHANNEL DISTURBANCE

                                                                                                                                                                                                                                                                                                                                                                                                                                               0.4% MIN




                                                                                                                                                                                                                                                                                                                                                                                                                                      1.65
                                                                                                                                                                                                                                                                                 LOCALLY SHAPE OUTLET TO CHANNEL INVERT
                                                                                                                                                                                                                                                                                 INSTALL 300mm THICK ROCK PROTECTION,
                                                                                                                                                                                                                                                                                 d50 = 150mm OVER GEOTEXTILE MATERIAL



                                                                                                                                                                                                                                                                                                                                                        SECTION                                 D
                                                                                                                                                                                                                                                                                                                                                         SCALE 1:50                                                                                  EXISTING SEWER MAIN
                                                                                                                                                                                                                                                                                                                                                                                               301




                                                                                                                                                                                               900x900 FEILD INLET
                                                                                                                                                                                                                          SUBSOIL CLEAN OUT POINT                                                                                                                                                                                                            A
                                                                                                                                                                             EXTENDED DETENTION                                                                                                                                                                                                                                                                               900x900 GRATED INLET PIT
                                                                                                                                                                             DEPTH 300mm


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     INLET PIPE

                                                                                                                                                                          IMPERMEABLE LINER                                                                                                                                                                                                                                                                                                                                                                                                      CONCRETE PAVEMENT


                                                                                                                                                                               500mm FILTER MEDIA
                                                                                                                                                                                                                                                                                                                                                                                  LOW FLOW
                                                                                                                                                                                                                                                                                                                                                                                  4EY (1IN3 MONTH) FLOW 42L/s
                                                                                                                                                                           100mm TRANSITION LAYER




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  0.15
                                                                                                                                                                            200mm DRAINAGE LAYER
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        LOW FLOW
                                        Filename: C:\PROJECTS\240628 - MUL RES - 5 SCHOOL STREET, POMONA\3.0 CAD\DRAWINGS\OPW\240628-OPW-C-402.DWG




                                                                                                                                                                                                                                                OUTLET PIPE
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       INTERNAL CONCRETE WEIR

                                                                                                                                                                                                                                                                                                                                                                                                     HIGH FLOW BYPASS
                                                                                                                                                                                                                            RIGID SLOTTED PIPES AT 0.5% FALL




                                                                                                                                                                            TYPICAL DETAIL - BIO-RETENTION FILTER MEDIA
Last Plotted: 2025-03-09 6:19 PM




                                                                                                                                                                                                                      SCALE 1:25
                                                                                                                                                                                                                                                                                                                                                                                                                                                             A                                                          HIGH FLOW BYPASS
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            SECTION A - A
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    SCALE 1:25

                                                                                                                                                                    NOTE:                                                                                                                                                                                                                                                                                 DETAIL                   A
                                                                                                                                                                                                                                                                                                                                                                                                                                                          SCALE?
Last saved by: JOSHLAVERS(2025-03-09)




                                                                                                                                                                    1.   BASIN BASE TO GRADE AT MIN 0.5%                                                                                                                                                                                                                                                                           -
                                                                                                                                                                    2.   BASINS TO BE CONSTRUCTED IN ACCORDANCE WITH IPWEA STD DRG WSUD 001-004
                                                                                                                                                                    3.   PLANTING IN ACCORDANCE WITH LANDSCAPE DRAWINGS AND SPECIFICATIONS
                                                                                                                                                                    4.   BIO-RETENTION TO BE IN ACCORDANCE WITH HEALTHY LAND & WATER
                                                                                                                                                                         BIO-RETENTION TECHNICAL DESIGN GUIDELINES (OCT 2014)                                                                                                                                                                                                                                                                                                                               NOTES:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            1.   FOR GENERAL & ROADWORKS/DRIVEWAY NOTES REFER DRG C-011.



                                                                                                                                                                                                                      North Point       Scale                  Horiz. Datum         Client                                  Consultant                                                                                     Project                                                                                        Drawing
                                                                                                                                                                                                                                                                 LOCAL                                                                                                                                                                                                                      Drawn           JCL                                                                             Project No.          Drawing No.           Rev No.
                                                                                                                                                                                                                                                                                             ROWAN ANDERSON                                                                                                                  MULTI RESIDENTIAL DEVELOPMENT                                                                               BIO-RETENTION BASIN
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Design
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        B
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            JCL
                                                                                                                                                                                                                                                               Vert. Datum                                                                                                                                                     OPPERATIONAL WORKS - CIVIL                                                                                SECTIONS & DETAILS                                  240628             OPW-C-402
                                                                                                                                                                                                                                                                  AHD
                                                                                                                                                                                                                                                                                                                                                                                                                                    5 SCHOOL STREET                                         Check           GM
                                                                                                                                                      B IR RESPONSE                                  4.03.25 LS                                                 RL Datum                                                                                                                                                            POMONA, QLD, 4568                                        Approved                          Approved Date       Signed                                                                      Sheet
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        A1
                                                                                                                                                                                                                                                                                                                                                                              CIVIL | STRUCTURAL | GEOTECHNICAL
                                                                                                                                                      A FOR APPROVAL                                10.12.24 LS                                                                                                             COPYRIGHT © All rights reserved.
                                                                                                                                                                                                                                                                                                                                                                              SUNSHINE COAST | BRISBANE | GOLD COAST                                                                         LACHLAN SWANN                     21.11.24                                                 Status   FOR APPROVAL
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