Annex 7 - Engineering Specifications

            crest remains within target                                MHWS such that
            oyster growth depths                                       settlement may result in
            OR                                                         final crest heights that
            - oyster habitat is established                            remain within the target
            and healthy                                                range for oyster growth.

                                                                       The objective of the
                                                                       structure is to enhance
                                                                       oyster growth. As such,
                                                                       rectification is
                                                                       undertaken only as
                                                                       required to achieve
                                                                       these objectives.
            Reprofile and/or place            Reinstate design         Maintain substrate
            additional rock if required.      levels. Works to be      profile as required to
                                              undertaken in            ensure structure
                                              accordance with          achieves optimal habitat
                                              design requirements.     potential.

                                                                       Target works ~12 months
                                                                       after initial deployment if
                                                                       possible to optimise
                                                                       benefit and reduce
                                                                       potential for impacts to
                                                                       developed habitat.
Siltation   In the event that significant     Final structure to be    Siltation is expected. The
            siltation results in burial of    consistent with the      design facilitates water
            significant portions of oyster    design principles,       flows through the
            habitat growth zones,             profiles and             structure to minimise
            modification of the structure     requirements.            siltation and crest at
            may be considered.                                         MHWS reduces potential
                                                                       for siltation to impact on
            Sediment not to be                                         target growth zones.
            disturbed.
Rock        Rock found >5m outside            Rock to be placed        Rock grade is stable if
displaced   Restoration Site to be            within design profile.   applied as per module
from        reinstated onto structure (or                              design and specifications
structure   removed).                                                  of design wave and
                                                                       current conditions.
                                                                       Individual rocks may be
                                                                       displaced in response to
                                                                       design wave event.
                                                                       Slumping of rock may be
                                                                       experienced along the
                                                                       seaward edge of reef
                                                                       patches.
Shell       Shell found >5m outside                                    Shell is not inherently
displaced   Restoration Site to be                                     stable in design
from        reinstated onto structure (or                              conditions. Design
structure   removed) if required.                                      enhances stability as
                                                                       much as possible