Compiled Reference Documents - MCU20/0084.01 (As Published)

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                 Desktop Assessment Findings
                 A review of historical records and imagery has been undertaken. No indicators of past landslip activity or
                 instability on or surrounding neighbouring sites has been identified.



                 Landslide Susceptibility Assessment
                 The landslide susceptibility assessment given in this report is consistent with the procedures outlined in the
                 report ‘’A Method of Zoning Landslide Hazards”, prepared by MacGregor and Taylor 2001. The following major
                 site features have been considered in determining a likelihood estimate.

                     •     The natural slope angle.
                     •     Local area geology.
                     •     Concentration of surface water.
                     •     Evidence of previous instability.
                     •     The natural slope shape/formation.
                     •     Material strength.
                     •     Evidence of groundwater.

                 A correlation between relative frequency and potential likelihood rating has been determined using the
                 following table:

                 Table 1: Correlation between relative frequency and potential hazard
                      Analysis          Relative Frequency                                    Likelihood Rating
                         >6.0          VH (Very High Hazard)                          The event is expected to occur.

                      2.0 – 6.0           H (High Hazard)               The event will probably occur under adverse conditions

                      0.6 – 2.0        M (Moderate Hazard)                  The event could occur under adverse conditions

                      0.2 – 0.6            L (Low Hazard)                   The event might occur under adverse conditions

                         <0.2          VL (Very Low Hazard)           The event is conceivable under exceptional circumstances


                 A Landslide Frequency Analysis has been completed, and the hazard for the nominated development site and
                 surrounds of such are outline in the table below:


                 Table 2: Summary of Landslide Susceptibility Assessment

                                   Analysis                           Relative Frequency                    Likelihood Rating
                         Landslide Frequency Analysis                          0.44                               Low


                 A landslide susceptibility analysis for the short-term accommodation has been carried out with the result being
                 ‘Low’. This is usually acceptable by regulators and managed by normal slope maintenance procedures.

                 The landslide susceptibility analysis summarised above is for global landslide type hazards. Although the result
                 of the assessment for this hazard type was ‘Low’, additional assessments were carried out for the two batters
                 on the eastern and western sides of the dwelling. Field observations indicated that these batters had surface
                 slopes of approximately 45°. This is considered too steep to achieve long-term stability.



                                                     Gold Coast | Sunshine Coast | Melbourne | Emerald


                 PTP/12376 328 Upper Pinbarren Creek Road, Pinbarren                                                    11 August 2023

Document Set ID: 22574699
Version: 1, Version Date: 07/09/2023