Annex 10 - Code 8 - Coastal Development & Tidal Works

  Performance outcomes                                  Acceptable outcomes   Response
                                                                              restoration footprint and is excluded from the footprint
                                                                              at a minimum distance of 10m from the footprint.
                                                                              The proposed oyster reef patches are designed and
                                                                              certified by engineers. The oyster reef patches are
                                                                              spaced (1-4m apart) so as not to not impede fish
                                                                              passage, cause significant erosion (due to wave
                                                                              refraction) or impact negatively on natural
                                                                              hydrological processes of the waterway including
                                                                              laminar river flow. The oyster reef patches are set
                                                                              away from the shoreline and will not interfere with
                                                                              overland flow and runoff as a result of floods.
                                                                              Water quality will be maintained at the restoration
                                                                              sites during the construction phase in accordance
                                                                              with the sediment management protocol outlined in
                                                                              the Project Restoration Plan (Section 6.4: Sediment
                                                                              Management). The restored oyster ecosystems will
                                                                              enhance water quality by filtering estuarine water,
                                                                              removing algae and particulate matter from the water
                                                                              column and converting nutrients, such as nitrogen
                                                                              and phosphorus, into biogenic oyster growth as well
                                                                              as binding these into the surrounding sediments.
                                                                              Water quality will be monitored at the restoration sites
                                                                              using standard parameters (pH, temperature,
                                                                              dissolved oxygen, salinity, total dissolved solid) and
                                                                              significant changes reported.
                                                                              The works will maintain recreational access to
                                                                              shorelines or the waters in which the oyster
                                                                              ecosystems grow. All shorelines with recreational
                                                                              access have been excluded from the selection
                                                                              process. Visual amenity will be maintained, as less
                                                                              than one third of the reef patch area will be exposed
                                                                              to view at low tide. Signage used to indicate the
                                                                              location of the restoration footprints will be optimised,
                                                                              with agency input, and will generally be considered
                                                                              temporary until the oyster ecosystems are
                                                                              established, at which time most signage, if not all will
State Development Assessment Provisions – version 2.6
State code 8: Coastal development and tidal works                                                             Page 15 of 20