Approved Plans & Document EXE22-0020 · EXE22/0020

Specialists in transport geotechnics

6.5 Inspection, Monitoring and Maintenance
Inspection, monitoring and maintenance is a key activity required for maintaining expected short-
and long-term performance of any existing structure and proposed works element. Generic
mitigations are noted below.
The owner of the property should be responsible for:
   •   Maintaining adequate surface drainage path in and out of the property and piping the
       drainage outlet away from the immediate slope to avoid potential scouring on the slope
       surface.
   •   Fixing/repairing the leaking or broken underground drainage/sewer pipes as soon as the
       fault has been identified.
   •   Undertaking periodic visual inspection of the property and surrounds for any cracking,
       ground movement etc (say every 6 months too annually or after large storm periods).
   •   Where the risk levels are determined to be higher then an inspection by qualified and
       suitably experienced personnel is required.
   •   Maintaining vegetation cover or other means of surface protection (as applicable) inside
       the property boundary to minimise surface infiltration into underlying foundation materials.
   •   Where practical, encouraging/facilitating vegetation growth on the crest and slope below
       the house.
   •   Seeking appropriate geotechnical and design advice if any construction activities
       including renovation/addition or replacement are planned within the extent of the property.
   •   Following Council’s relevant regulatory requirements for new construction inside the
       property.

6.6 Engineering Design and Practice
Good engineering design of foundations and earthworks not only reduces maintenance costs of
the structure throughout its design life, it also minimises uncertainties associated with foundation-
structure interaction and hence the risks. Some notes on good and poor engineering practice for
hillside construction are presented in Appendix 3 (reproduced from AGS 2007c, Appendix 3). It
is recommended that the guidelines on good engineering practice provided in Appendix 3 be
used for this site.

7 Summary and Conclusions
Civil Geotechnical Consultants has undertaken a slope risk assessment at 24 Lyrebird Court,
Peregian Beach and it is considered that based on the site walkover and with reference to the
recommendations contained within this report the development will have a low risk of instability
due to landslip actions.
It has been found that the development would, subject to the recommendations herein being
followed, satisfy the Performance Outcome PO1 as defined in the Noosa Plan 2020, Table
8.2.8.3 of the Noosa Shire Council Planning Scheme.
A site-specific geotechnical assessment has been completed for the site and has demonstrated
that the landslide hazard risk is considered to be Low. The development is not situated in an area




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