271117 Techtonic GeoTech Cooroy Mtn Rd

27 November 2017                                                                Project No. 17385-001-Rev0

Mr Ken Freeman

Email: [email protected]
Copy to: Teresa Hutton ([email protected])



GEOTECHNICAL INVESTIGATION AND SLOPE STABILITY ASSESSMENT
PROPOSED EXTENSION TO RESIDENCE
400 COOROY MOUNTAIN ROAD, COOROY


Dear Ken,

1.0     INTRODUCTION
As requested, Tectonic has undertaken a geotechnical investigation and slope stability assessment for
proposed extensions to the residence at 400 Cooroy Mountain Road, Cooroy. This report presents the
results of our investigation and slope stability assessment, together with geotechnical advice for the
development, including earthworks, footings, retaining walls, and drainage. In summary, subject to
implementation of the recommendations made herein, it is assessed that there is a Low Risk of slope
instability affecting the residence in accordance with the Australian Geomechanics Society “Guidelines for
Landslide Risk Management”, dated March 2007 (AGS 2007).

1.1   Details of the Site and Proposed Development

The site is described as Lot 11 on SP148816 and covers an area of 195, 512 m² (refer to Text Figure 1 on
the following page). Access to the property from Cooroy Mountain Road is via a shared driveway located
along the western property boundary. The existing residence is located in the south-western corner of the lot,
and consists of a two storey house, with a separate garage and small office building to the east. A two-tiered
rock boulder retaining wall is located upslope (south) of the house and driveway. The surrounding land-use
is predominantly pastoral, with some densely vegetated bushland on Mount Cooroy to the south.

Further details regarding the site are provided in Section 3.




                                             Tectonic Geotechnical Pty Ltd
                                             PO Box 899, Buderim, QLD 4556
                                           Mobile 0437 755 750 / 0437 756 711
                                                 www.tectonicgeo.com.au
                                                   A.B.N. 83 165 727 828