Attachment C - Soil Survey Report · MCU18/0013

Project No. 1-20119                                                                                                             Page | 5
March, 2018
Ref: 1-20119, 2018-03-02, BR VER 2
Sam Hopper – Slope Stability Assessment and Geotechnical Report - Proposed Residence, 24 Arakon Crescent, Sunshine Beach




                        FIGURE 3 - SITE AERIAL VIEW (NEARMAP.COM, DEC, 2017)

    3.3 Regional Geology
Based upon the 1:100,000 Gympie Special Geological Map (Department of Mines and Energy,
Queensland, 1999), the site is underlain by beach sand deposits of the Quaternary Age (1.8
Mya to present) described as Pleistocene dune sand (quartz sand) and Holocene beach ridge
and berm (quartz sand).

    3.4 Published Stability Data
The searchable Geoscience Australia Landslide Database was reviewed.                                                       No recorded
landslides were located in the vicinity of the site (2km radius).

    3.5 Site Factors
The principal site features were:-

          The site is located on the eastern side of a low hill, with slopes falling relatively steeply
           towards the east (to Sunshine Beach) (refer Plate E1, Appendix E).
          Arakon Crescent has been cut into the natural slope with a crib retaining wall
           constructed along the western side of the road, opposite the site. It is likely that as part
           of the road construction, some filling was undertaken at the western side (upper part) of
           the site (refer Plate E2, Appendix E).
          The provided survey (refer Section 1.6) indicates a fall of approximately 9.5m across the
           site with an RL of 27.5m at the western boundary and approx. RL 18.0m at the eastern
           boundary (refer Plate E3, Appendix E).
          A small gully head type feature exists near the centre of the eastern boundary of the
           site, extending into the site by approx. 6.0m (refer Plate E4, Appendix E). This appears
           to have been an area of scour at some time in the past.
          A pedestrian access track also crosses the south eastern corner of the site, which has
           caused scour and erosion of the sand over time.
          An approx. 2.0m wide Council easement runs along the southern site boundary.