Development Application Part 2 - Environmental & Stormwater Management Plans · OPW11/0335

NOTE - ALL DIMENSIONS IN mm
                                                                                   PLANTINGS TO BE SPECIFIED
                                                                                   (FLESHY NATIVES ABLE TO SURVIVE
                                                                                                                                                      EXTENDED DETENTION ZONE
                                                                                   PERIODIC INUNDATION)
      SCOUR/CLEANING                                                                                                                                  DESIGN FLOWS POND IN EXTENDED DETENTION
      CONNECTION FOR                                                                                                                                  ZONE, INCREASING VOLUME OF STORMWATER
 UNDERDRAIN PIPEWORK                                                                                                                                  THAT IS CAPTURED AND TREATED
            SURFACE (FLAT)
     BUND/LANDSCAPE                                                                                                                                                                     OVERFLOW STRUCTURE
INTO RETENTION BASIN                                                                                                                                                                    600mm DIAMETER (2M WEIR)
                                                                                                                                                                                        CONCRETE MANHOLE WITH
                                                                                                                                                                                        GRATE
                                                                                                                                                                                        GEOTEXTILE (FILTER CLOTH)
                                                                                                                                                                                        LAYER




                                                                                                                                                                                     GEOTEXTILE (FILTER CLOTH)
                                                                                                                                                                                     LAYER
                   TRANSITION LAYER
           COARSE SAND (APPROX 1mm)                                                                                                                                                  UNDERDRAIN PIPE
                                                                                                                                                                                     100mm SLOTTED PVC (AG PIPE)
     FILTER MEDIA/PLANTING LAYER                                                                                                                                                     0.5% SLOPE IN GRAVEL BED
                 SANDY LOAM SOIL                                                                                                                                                     (NO GEOTEXTILE WRAPPER)
                                                                                                                                                                                     DRAINAGE LAYER
                                                                                                                                                                                     FINE AGGERGATE
                                                                                                                                                                                     (6mm PEA GRAVE


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