Slope Stability Assessment Existing Earthworks - OPW21-0279

17 September 2021                                                                                Project No. 21354-001-Rev0

Anthony Kelly

Email: [email protected]



SLOPE STABILITY ASSESSMENT
EXISTING EARTHWORKS
91 LAWNVILLE ROAD, COOROY


Dear Anthony,

1.0     INTRODUCTION
Tectonic has undertaken a slope stability assessment for existing earthworks at 91 Lawnville Rd, Cooroy.
This report presents the results of our slope stability assessment, together with geotechnical advice for the
development. In summary, subject to implementation of the recommendations made herein, it is assessed
that there would be a Very Low Risk of slope instability affecting the areas where earthworks have been
undertaken, in accordance with the Australian Geomechanics Society Guidelines for Landslide Risk
Management, dated March 2007 (AGS 2007).

1.1    Details of Site and Development

The subject site is described as Lot 1 on RP223270 and covers a total area of 15.67 ha. The site is
accessed via a driveway from Lawnville Road, downslope to the west. The surrounds feature similar rural
acreage properties. Text Figure 1 below illustrates the site position. A detailed description of the site
features is given in Section 2.




                                                                                               Existing residence




                                                                                                    Lot boundary




Text Figure 1: 2019 aerial image of site and close surrounds (courtesy Noosa Council [NC] Interactive Maps)




                                                     Tectonic Geotechnical Pty Ltd
                                                    PO Box 899, Buderim, QLD 4556
                                        Office: 07 5478 9016 Email: [email protected]
                                                        www.tectonicgeo.com.au
                                                          A.B.N. 83 165 727 828