Town Planning Report and Appendices - Cooroibah

Performance outcomes                            Acceptable outcomes                                             Response     Comment
                                                                                                                             Upon completion of the works, the hydraulic conditions of
                                                                                                                             the waterway will maintain adequate fish passage.
                                                AO25.4 Flows across, or releases out of, the structure are                  The proposed works relate to the replacement of the
                                                such that adequate fish passage is provided in terms of                      existing culvert. The proposed works will not create a barrier
                                                timing, frequency and duration, as well as water volume                      to fish movement and therefore no further design
                                                and depth.                                                                   requirements for fish passage is needed.
                                                And
                                                AO25.5 Water quality across the barrier allows for fish                     Any potential impacts on water quality are proposed to be
                                                passage.                                                                     managed through mitigation measures including:
                                                                                                                                  •    Construction works will be done during periods of
                                                                                                                                       low rainfall or when the stream is dry. This will
                                                                                                                                       minimise the potential impacts associated with
                                                                                                                                       scouring, erosion and sedimentation. In addition, it
                                                                                                                                       will minimise impact to aquatic species that may
                                                                                                                                       normally be located within the subject site when it
                                                                                                                                       is inundate;
                                                                                                                                  •    Works will be limited to the minimum disturbance
                                                                                                                                       area as far as practicable; and
                                                                                                                                  •    There will be no additional temporary waterway
                                                                                                                                       barrier works associated with construction. All
                                                                                                                                       construction materials and machinery will be stored
                                                                                                                                       within designated laydown areas away from the
                                                                                                                                       waterway. Stockpiles will be protected by suitable
                                                                                                                                       drainage diversion structures and/or covered to
                                                                                                                                       minimise contact with rainfall and/or stormwater.
Temporary waterway barrier works
PO26 The temporary waterway barrier             AO26.1 Temporary waterway barrier works can be in               N/A          Temporary waterway barrier works are not proposed as part
works will exist only for a temporary           place at a given site for no more than 12 months.                            of this application.
period and cause a minimal and                  And
acceptable disruption to fish movement in
the area, during the period of installation.    AO26.2 In tidal waters, to ensure significant impacts on        N/A          Refer to Response AO26.1.
Editor’s note: Code for self assessable         upstream and downstream habitats are avoided, the
development Temporary waterway barrier          temporary waterway barrier works will not completely
works (WWBW02), Department of                   block the waterway for more than three weeks, unless
Employment, Economic Development and            steps taken to ensure water exchange occurs (such as
Innovation, 2010 and the GIS data layer         breaching of the bund or pumping water), to prevent
‘Queensland Waterways for Waterway Barrier      upstream marine plants and benthos being submerged in
Works’ provide guidance on the length of time
                                                freshwater, or the barrier is sufficiently permeable.
that a temporary barrier may be acceptable in
particular streams.                             And
                                                AO26.3 Delays to fish movement are avoided at times             N/A          Refer to Response AO26.1.

State development assessment provisions                                        Module 5 — Fisheries resources          5.2 Constructing or raising waterway barrier works in fish habitats state code
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