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

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           SEDIMENT CONTROL
                                                                    on your building site


            For safety reasons and sediment control efficiency, sediment barriers generally should not be located
            outside property boundaries without Council approval. This especially applies to sediment barriers placed
            on the road. Sediment barriers placed in front of roadside stormwater inlets are rarely as effective as onsite
            controls and at best usually result in the sediment being washed down the street and into the nearest
            open gully inlet. They should only be used as a last resort (refer Figure 4.5 and 4.6). If a roadside gully
            inlet barrier is to be installed, then it should not fully block the inlet structure.

                                                      On-Grade Gully Inlet                                                                     Sag Gully Inlet
             Sandbags overlap
             onto kerb .               4.Om (min)
                                                                                               Sandbag spacer




                                                           Gully inlet remains open
                                                           to control local flooding
                                                           and drainage



              Figure 4.5                                                                     6eotextile filter socl(
                                                                                W

            A roadside on-grade gully inlet sediment barrier. On a hillside,           I    Figure 4.6                   Gully inlet remains open
            sediment barriers may consist of a temporary dam constructed
            from sand or gravel filled bags placed at least 4 metres                       Roadside sag (low point) gully inlet only. At road sag points, a
            up-slope from the gully inlet. Fabric should not be placed                     sediment barrier may be constructed around the gully inlet, but
            across the grate or gully inlet.                                               should not block the inlet.




           All sediment control measures need to be regularly checked and maintained in good working order.
           Best practice includes anticipating potential risks and being prepared for abnormal circumstances
           and emergencies. This should include stockpiling extra sediment fence material on-site to facilitate
           emergency repairs.

           Replace sediment fences if the fabric is ripped or otherwise damaged. The maintenance of sediment
           fences includes the removal of sediment deposited up-slope of the fence and, where necessary,
           re-trenching the fabric and ensuring posts are firmly secured in the ground.

            If excessive sediment build-up occurs, reapply crushed rock to the entry/exit pad.




                                                                                             11110
                                                    Regular maintenance of sediment control devic



For further information about the Healthy Waterways Campaign and fhe Partnership telephone (07) 3403 4206 or visit the Healthy Waterways website at www.healthywaterways.org




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