MCU25 0087 - Reference Document - Coastal Hazard Assessment (As Published)

                                                                                           17 The Esplanade, Sunshine Beach                                                       Report


                      Table of Contents
                      1     INTRODUCTION............................................................................................................................................ 1
                      2     Site description............................................................................................................................................... 2
                            2.1 Development Proposal .......................................................................................................................... 2
                            2.2 Site Inspection ....................................................................................................................................... 2
                            2.3 Survey ................................................................................................................................................... 9
                            2.3.1       Dune Toe .......................................................................................................................................... 9
                            2.4 Geotechnical Investigation .................................................................................................................... 9
                      3     Historical aerial photography assessment.................................................................................................... 11
                            3.1 Satellite Imagery .................................................................................................................................. 15
                      4     Coastal Processes ....................................................................................................................................... 18
                            4.1 Tides and Storm Tide .......................................................................................................................... 18
                            4.1.1       Astronomical Tides .......................................................................................................................... 18
                            4.1.2       Sea Level Rise ................................................................................................................................ 18
                            4.1.3       Storm Tide....................................................................................................................................... 18
                            4.2 Wave Climate ...................................................................................................................................... 19
                            4.3 Sediment Transport ............................................................................................................................. 20
                      5     Erosion Prone Area ...................................................................................................................................... 21
                            5.1 Erosion Prone Area Assumptions ........................................................................................................ 21
                            5.2 Erosion Prone Area Reassessment..................................................................................................... 22
                            5.2.1       Long-term Erosion (N x R) .............................................................................................................. 22
                            5.2.2       Short-term Erosion (C) .................................................................................................................... 23
                            5.2.3       Recession due to Sea Level Rise (S) .............................................................................................. 27
                            5.2.4       Dune Slumping (D).......................................................................................................................... 28
                            5.2.5       Summary of the Erosion Prone Area Reassessment ...................................................................... 29
                            5.3 Comparison to BMT (2018) Assessment ............................................................................................. 31
                            5.3.1       Beach Profile ................................................................................................................................... 31
                            5.3.2       Depth of Closure ............................................................................................................................. 32
                            5.3.3       Dune of Toe .................................................................................................................................... 32
                            5.3.4       Active beach width and height......................................................................................................... 32
                            5.3.5       Dune height ..................................................................................................................................... 32
                            5.3.6       Sediment size.................................................................................................................................. 33
                            5.3.7       Storm Tide....................................................................................................................................... 33
                            5.3.8       Wave Height .................................................................................................................................... 34
                            5.3.9       Long-term erosion ........................................................................................................................... 34
                            5.3.10          Short-term erosion ...................................................................................................................... 34



                                                                                                                       252662-MN-RP-CO-0001B | 10 November 2025 | Page ii

Document Set ID: 24631530
Version: 1, Version Date: 24/03/2026