24-01-2020 - Appeal No. 245 of 2019 - Final Order of Judge Rackemann · 51987.2951.01

 80   The above key questions were agreed in the joint experts meeting of coastal engineering dated 7
      August 2019.

      That joint expert report also set out the methodology to be used, and the data to be used to address
      the agreed issues in relation to coastal engineering.

      The additional work was carried out by Omtrek Pty Ltd under the supervision of PP. The work
 85   delivered a coastal engineering analysis of the erosion vulnerability of Sunshine Beach adjacent to
      the subject site.

      The additional work carried out is summarised in the following report:

           Working Notes: M Design and Fourteen Enterprises Pty Ltd as trustee v Noosa Shire Council ‐
            42 Seaview Terrace, Sunshine Beach, Omtrek Pty Ltd, July 2019.
 90        Coastal Erosion historic assessments by Neil Collins

      This is included in Attachment 4 to this joint report.

      Since lodging the appeal, the Appellant has carried out additional detailed geotechnical
      investigations for the Site, with resultant reporting by Core Consultants Pty Ltd dated May 2019, 23
      July 2019 and 29 August and 24 September 2019 These reports provide additional detail on the
95    materials and the densities of material below the subject site, and also provide refined details of a
      proposed micro‐pile foundation system under the proposed pool. Slip analysis including assessment
      of coastal erosion impacts and agreed erosion bite (as discussed below) on stability and the
      foundation design is incorporated in this reporting. The September 2019 report supersedes the
      three previous Core Consultants reports.

100   GENERAL POINTS OF AGREEMENT

      1.    The erosion prone area provides a conservative estimate of erosion vulnerability due to the
            inclusion of a 40% safety factor. The calculations associated with the terms of the erosion
            prone area formula also assume that the beach and dunes consist of loose sand with uniform
            physical characteristics.
105   2.    The erosion prone area does not take account of natural features that may influence sediment
            transport rates (i.e. Noosa Headland) and the components (i.e. recession due to sea level rise
            and short‐term erosion) of the erosion prone area assume a long straight coastline without
            headlands or other features
      3.    If the pool can be designed to accommodate without failure erosion associated with a 100
110         year ARI storm event combined with recession due to sea level rise predicted over the life of
            the pool, assumed to be 30 years (i.e. a sea level rise of 0.3 metres by the year 2050) it is
            agreed that the swimming pool is unlikely to adversely impact on adjoining structures or on
            public land including the beach.


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