Reference Document - MCU25 0092 & OPW25 0143 (As Published)

                 Figure 4: Landslide hazard overly map showing lot boundary in red (from Noosa Shire Council)

                 Based on a desktop review of the provided data and understanding of the area, there are two potential failure
                 mechanisms can be considered, these include:

                 »     Hazard 1 – Small rotational failure through the natural loose sands – volume of failure less than 20m3
                       (failure will required an unusual sever triggering event)
                 »     Hazard 2 – Large rotational failure through the natural loose sands – volume of failure less than 2000m3
                       (failure will required an extreme triggering event)
                 A qualitative landslip risk assessment was completed for these potential failure mechanisms in general
                 accordance with Australian Geomechanics (2007) Guideline for Landslip Susceptibility, Hazard and Risk
                 Zoning for Land Use Planning). The slope risk assessment is summarised in Table 1.

                 Table 1: Summary of the qualitative slope risk assessment
                                               Hazard 1 – small rotational failure           Hazard 2 - Large rotational failure
                          Hazards            though the natural loose sands up to           though the natural loose sands up to
                                                            20m3                                         2,000 m3
                                                 Property               People, who             Property               People, who
                                                                    either live, or may                            either live, or may
                                                                     that spend some                                that spend some
                        Risk Element
                                                                      time in the area                               time in the area
                                                                      affected by the                                affected by the
                                                                          landslip                                       landslip
                     Likelihood                 POSSIBLE                 POSSIBLE         BARLEY CREDIBLE          BARLEY CREDIBLE
                     Frequency                       C                       C                      F                      F
                     estimate,
                     expressed as an
                     annualised
                     probability and
                     taking into account
                     the probability of
                     spatial impact



                 SCG Consulting Engineers                               Page 4 of 5                     SCG 0599    24 September 2025


Document Set ID: 24189920
Version: 1, Version Date: 30/09/2025