Annex 10 - Code 8 - Coastal Development & Tidal Works

  Performance outcomes                                  Acceptable outcomes   Response
                                                                                 sediment transport or experience considerable
                                                                                 sediment movement.
                                                                                 Concept module layout - Concept Layouts 2 & 3
                                                                                 (segmented longshore modules) show how oyster
                                                                                 reef patches are configured to minimise impacts
                                                                                 to littoral drift and coastal processes by being
                                                                                 aligned with river flows and providing gaps
                                                                                 between oyster reef patches. Despite this, the
                                                                                 oyster reef patches are anticipated to act as a
                                                                                 segmented reef and provide some sheltering to
                                                                                 the shoreline from wave action and vessel wake
                                                                                 and result in reduced erosion. Reef has been
                                                                                 segmented to limit this impact and allow
                                                                                 penetration of waves and flows without resulting
                                                                                 in pockets of increased erosion.
                                                                                 Concept layout 1 provides habitat that extends
                                                                                 out perpendicular from the shore similar to
                                                                                 observed development of oyster reef habitats.
                                                                                 This layout is only suitable in locations with low
                                                                                 sediment transport and not within Restoration
                                                                                 Zone 1 Main Channel. In these locations there is
                                                                                 limited risk of the works acting as a submerged
                                                                                 groyne, which would have the potential to impact
                                                                                 on littoral drift, erosion, and accretion patterns (as
                                                                                 well as result in undesirable burial of sections of
                                                                                 the structure).
                                                                                 Shaped oyster reef patches – Oyster reef
                                                                                 patches may be curved or shaped to reflect the
                                                                                 local bathymetry and site-specific conditions.
                                                                                 Alignment with the shoreline or directing flows

State Development Assessment Provisions – version 2.6
State code 8: Coastal development and tidal works                                                             Page 3 of 20