2020-11-16 General Committee Minutes

GENERAL COMMITTEE MEETING MINUTES                                         16 NOVEMBER 2020


              Geotechnical Stability
        7.    A footing system and erosion protection system must be designed to withstand
              the short-term erosion associated with a 500-year average recurrence interval
              storm event combined with shoreline recession due to sea-level rise for 2100
              climate change.
              The short-term erosion associated with a 500-year average recurrence interval
              storm event combined with shoreline recession due to sea-level rise for 2100
              climate change to be considered for the design of stabilisation measures must
              be that shown on Figure 8-3 of the 2019 Omtrek report “Working Notes: Mason
              v Noosa Shire Council - 54 Seaview Terrace, Sunshine Beach”, (Reference
              J0033 R1, 11 May 2019).
        8.    The footing system and erosion protection system must in accordance with the
              works detailed in the Tectonic report “Geotechnical Investigation, 54 Seaview
              Terrace, Sunshine Beach”, (Reference 19078-003-Rev 0, 17 July 2020) and
              other supporting documents referenced in the Tectonic report.
        9.    The design must include the protection of the northern and southern boundaries
              of the site to prevent erosion on neighbouring properties exposing the side
              boundaries of the site to erosion. The minimum extent of the side boundary
              protection must be determined by a line drawn at 28° extending upwards to the
              west from the base of the rear point of the erosion shown on Figure 8-3 of the
              2019 Omtrek report “Working Notes: Mason v Noosa Shire Council - 54 Seaview
              Terrace, Sunshine Beach”, (Reference J0033 R1, 11 May 2019).
        10.   The design must be accompanied by certification by a Registered Professional
              Engineer of Queensland (RPEQ) specialising in geotechnical engineering that
              the design is satisfactory and will provide a long-term factor of safety concerning
              slope stability of no less than 1.5.
        11.   Following construction, certification must be supplied to Council by an RPEQ
              specialising in geotechnical engineering that the works have been constructed
              under the approved design.
        12.   A dilapidation survey shall be carried out of all adjacent properties before the
              demolition of the existing dwelling on the site.
        13.   Due to the risk of instability on the existing dune slope and the potential for
              settlement of loose sand on the adjacent properties, vibrations shall be kept to a
              minimum and shall be monitored during the construction of the Detached House.
              Driven piles (both sheet piles and pile footings) are not permitted on the site.
        14.   Landscaping at the rear of the property and the crest of the existing dune slope
              shall be limited to a maximum surcharge of 5kPa unless a site-specific slope
              stability analysis is carried out to demonstrate that higher loads are acceptable.
        15.   Under no circumstances shall building materials be temporarily stockpiled in the
              area of the crest of the existing dune slope or on the slope.
        16.   Discharge of concentrated stormwater flows onto the dune slope shall be
              avoided, and under no circumstances shall subsurface disposal of water be
              permitted using infiltration pits.
        17.   Stormwater runoff from gutters, down-pipes, driveways, and paved areas shall
              be collected and directed by pipes into the Council stormwater system along
              Seaview Terrace. Where this is not possible, surface water should be directed
              to infiltrate into the ground around the edges of hard surfaces, with infiltration
              areas set back as far as possible from the crest of the dune slope.
        18.   The existing dune slope and any areas disturbed by the construction of the
              proposed development shall be revegetated as soon as possible to reduce the
              potential for erosion.


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