Reference Documents - RAL22/0032

                Contour Consulting Engineers                                                                     23038-001-Rev0
                                                                                                                   6 March 2023

                2.4     Surface Drainage
                Natural surface drainage follows the ground surface gradients from the proposed development area to the
                west, ultimately into the drainage system along Uhlmanns Road. Generally, surface water is expected to
                drain well from the area considering the positive gradients. No signs of significant erosion were observed
                around the proposed development area at the time of the assessment; however, scouring was observed
                within the natural drainage line and at the culvert crossing outlet further to the west along Uhlmanns Road.

                2.5     Vegetation
                During our walkover assessment, vegetation across the proposed development area and most of the site
                comprised grassed areas, bushes, and mature trees with a relatively open understory. Mature trees around
                the proposed development area were relatively straight, exhibiting no obvious signs of tilting/leaning which
                could be attributed to global slope instability.

                2.6     Buildings and Other Structures
                At the time of the assessment an existing residence and shed were in close proximity to the proposed
                driveway alignment. Sandstone block walls <1 m high were observed around terraced areas adjacent to the
                residence. Based on an external visual assessment, the existing structures appeared to be in relatively good
                structural condition, with no obvious signs of distress (e.g. cracking, misalignment etc.) which could be
                attributed to slope instability.

                The asphalt seal along Uhlmanns Road and an existing driveway adjacent to the proposed development
                area were noted to be in good condition, with no obvious signs of cracking or distress which would indicate
                slope instability. Other structures and driveways on the property were well away from the proposed
                development area and were not assessed.




                Text Figure 7: View of the existing residence (LHS) and Uhlmanns Road adjacent to proposed driveway (RHS)




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Document Set ID: 22374434
Version: 1, Version Date: 14/04/2023