Reference Document - Geotechnical Investigation Report - DBW24/0090 & RAP24/0025

                Rebecca Stead                                                                                        20248-001-Rev0
                                                                                                                   3 September 2020




                                       Main Extension Area
                                                                                              Existing Residence




                Text Figure 5: Panoramic view of the existing residence and main extension area, looking south




                                       Proposed Carport Site




                Text Figure 6: Panoramic view of the proposed carport area, looking west from the existing residence



                2.3     Groundwater
                No signs of groundwater seepage (‘springs’) were observed during our walk-over, nor was groundwater
                recorded during borehole drilling.

                2.4     Surface Drainage
                Surface drainage would be expected to follow the contours to the north-east. Run-off would be minimal due
                to the sandy nature of the soils at the site, and is currently interrupted by terracing and landscaping
                features.

                It is acknowledged that a surface water catchment for the site exists to the west. However, no significant
                surface water run-off features were noted around the western side of the residence during our assessment
                (e.g. deep rilling or scour/wash out scars) which would indicate that significant overland flow is generally
                minimal during rainfall events. Some erosion protection (i.e. coir logs) was present to the west of the
                residence.

                Erosion scour was noted along the eastern edge of the residence, including some undermining of concrete
                footings for the northern staircase and residence slab. This appeared to have been caused by overtopping
                of the existing stormwater infrastructure (i.e. roof gutters), with outlet pipes discharging within close
                proximity to the existing residence.




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Document Set ID: 23080488
Version: 1, Version Date: 27/06/2024