2008/0169 Response to information request - 71 Seaview Tce Sunshine Beach · 132008.169

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                                                                                                           URBAN




3.3       EROSION CONTROL

      •    Soil materials will be replaced in the same order they are removed from the ground. It is particularly
           important that all subsoils are buried and topsoils remain on the surface at the completion of works.
      •    While C-factors are likely to rise to 1.0 during the works program, they should not exceed those given in
           Table 3 in the long term. The requirement of Table 3 can be achieved as follows.


               In areas of sheet flow, with a temporary vegetative cover and a suggested listing of suitable plant
              species as shown in Table 4 (note, these plants only protect the ground surface for up to six months).
              The area can be sprayed with a soil binder for protection up to 3 months duration using Terra-
              Control® or equivalent.


              In areas of concentrated water flow, with 3S0 gsm jute matting or equivalent.


      •   Lands recently established with grass species will be watered regularly until an effective cover has
          properly established and plants are rapidly growing. Further application of seed might be necessary later
          in areas of inadequate vegetation establishment.
      •   Where practical, foot and vehicular traffic will be kept away from all recently stabilised areas.
      •   Earth batters shall be constructed with as low a gradient as practical
      •   All earthworks, including waterways/drains/spillways and their outlets, will be constructed to be stable in
          at least the 10-year ARI storm event.
      •   During windy weather, large, unprotected areas will be kept moist (not wet) by sprinkling with water to
          keep dust under control.


                                        Table 3 - Maximum Acceptable C-Factors


                      Land Use                    Limitation                       Comments

            Waterways and other areas               0.05          Applies after ten working days from
            subjected to concentrated                             completion of formation and before they
            flows, post construction                              are allowed to carry any concentrated
                                                                  flows. Foot and vehicular traffic will be
                                                                  prohibited in these areas (70% ground
                                                                  cover)
            Stockpiles, post                         0.10         Applies after ten working days from
            construction                                          completion of formation. Maximum C-
                                                                  factor of 0.10 equals 60% ground cover.
            All lands, including                     0.15         Applies after 20 working days of inactivity,
            waterways and stockpiles                              even though works might continue later.
            during construction                                   Maximum C-factor of 0.15 equals 50%
                                                                  ground cover.




 SOIL AND WATER MANAGEMENT PLAN - Revision A                                       71 Seaview Terrace. Sunshine Beach