Annex 11 - Code 11 - Marine Plants

  Performance outcomes                               Acceptable outcomes                    Response
                                                                                            months, images will be used to compare changes in
                                                                                            shoreline condition 100m upstream and downstream
                                                                                            of the restoration site.

                                                                                            Where significant changes are determined and are
                                                                                            attributable to the presence of the substrate, relevant
                                                                                            agencies will be informed, and remediation actions
                                                                                            agreed on.

                                                                                            The restoration substrates are engineered and
                                                                                            certified for stability and durability, which is provided
                                                                                            through specification of the type of rock (igneous or
                                                                                            metamorphic) size of rock used )150-500mm
                                                                                            diameter) and its placement on site, as specified in
                                                                                            the drawings.

                                                                                            The engineers certify that the weight of the rock
                                                                                            substrate, coupled with its geometric profile and
                                                                                            interlocking nature will prevent significant movement,
                                                                                            remaining in place under their own weight.

                                                                                            The engineers certify that the specific hand placement
                                                                                            of oyster shell into the voids of the central areas of the
                                                                                            substrate, as per the specifications, would sufficiently
                                                                                            ensure the shell is fixed to site, and that any
                                                                                            dislocation of the shell from the voids and then
                                                                                            beyond a restoration site would be negligible. Where
                                                                                            a significant loss of shell from site does occur, this
                                                                                            can be readily reinstated onto the restoration site, as
                                                                                            the volumes are quite low (5-10kg/m2). Shell
                                                                                            displaced more than 5 metres from the restoration site
                                                                                            will be returned to the oyster reef patch, or if negative
                                                                                            impacts detected, removed.
  PO3 Development impacting marine plants:           No acceptable outcome is prescribed.   Complies with PO3
     1. directly abuts land that has full riparian                                          Due to the nature of the works and the growth of
        access rights; or                                                                   oysters typically below high tide, the works are
     2. provides a public facility.                                                         required to be on tidal land.




State Development Assessment Provisions – version 2.6
State code 11: Removal, destruction or damage of marine plants                                                               Page 5 of 24