OPW052025 Report - Part 2

         Approx. house site on
                 crest of knob




                  Actual driveway route to
                                 be adopted




                                                   Middle Creek Road


                             Text Figure 1: Sketch of proposed works (provided by SQ)



3.            Aims & Method of Investigation
The main aims of the investigation were to address landslide risk and to provide guidance regarding
geotechnical matters for the proposed driveway and residential building. The investigation and report
have been designed to address the requirements of the relevant Noosa Council (NC) codes and policies
regarding slope stability.


3.1           Fieldwork
An experienced engineering geologist from Tectonic undertook an initial site walk-over on 13 March
2025 to visually assess any indicators of past slope instability. The walk-over included assessment of soil
and rock exposures, surface drainage conditions, topography, evidence of erosion, existing structures
and vegetation coverage/condition (as detailed in Section 4 below).
Five test pits were undertaken using a 5.5 tonne excavator with toothed bucket and ripper attachments
to depths of between 0.9 m and 3.2 m below ground level (BGL). One scrape was also completed on the
cut batter where the driveway is sidelong across the slope.



Geotechnical Investigation & Slope Stability Assessment
9 April 2025 | 25050-001-Rev0                                                                             2