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

               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




1
               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
                                          4 Om (MM)
                                                                                                       Sardbog




                                                                                                                                                                             3
                                                                      bully inlet remains open     C
                                                                      to control locol flooding
                                                                      and drainage
                                         Bypass                                                                                                                              u


                 Figure 4.5
                                                                                         12
               A roadside on-grade gully inlet sediment barrier. On a hillside,                    Figure 4.6                   buoy ode? rants 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 qully 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.




                                                               Regular maintenance of sediment,



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




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