Reference Documents - RAL22/0032

                Contour Consulting Engineers                                                                                  23038-001-Rev0
                                                                                                                                6 March 2023

                2.0         DESCRIPTION OF EXISTING CONDITIONS
                2.1       Geology
                The 1:100,000 scale Gympie Surface Geological Map 1 (Ref. Text Figure 3 below) indicates that the site is
                underlain by materials derived of the early to middle Triassic age Kin Kin Beds (blue-green shading),
                which are described as “commonly cleaved and commonly kinked mudstone…” The Australian
                Stratigraphic Units Database describes the Kin Kin Beds as “arenite, argillite and phyllite.”




                                                                                          Approx. Site Location




                Text Figure 3: Extract of Gympie Surface Geology Map

                2.2       Topography
                During the site walk-over, topographic features specific to the site were noted, and ground slopes were
                recorded using a hand-held clinometer. As shown in Text Figure 4 overleaf, the proposed driveway
                alignment is located on the western flank of a well rounded spur. The driveway alignment extends from the
                crest of the spur. A northerly trending natural drainage line is located to the west of the proposed alignment,
                with a culvert crossing along Uhlmanns Road further to the west.

                Gradients along the proposed driveway alignment were relatively gentle across the crest of the spur being
                <7°, steepening progressing down the flank to between 10° and 15°, before reducing to become relatively
                level along Uhlmanns Road. An inferred road cutting about 1 m high was present near the toe of the slope
                which was battered at about 20°. Downslope of Uhlmanns Road the ground surface continued at about 20°
                to 25°.

                Areas immediately around the proposed development area had been altered by previous cut and fill
                earthworks, presumably during construction of the existing structures and driveway. Cut and fill in the order
                of about 1.5 m deep and 2 m high appeared to have been undertaken, with batters between about 20° and
                25°.




                1
                    State of Queensland, Dept. of Natural Resources, Mines and Energy, Gympie Surface Geology, Sheet 9445, 2018




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