slope stability report

All stormwater runoff from hard landscaped areas should be directed around the perimeter of the house and
contained within the site via diversion bunding, scour proof drains and field inlets. Where possible stormwater
runoff from roofed areas should be disposed of via piping to the road reserve via approved kerb adaptors.
Otherwise, piped roof stormwater runoff should be connected to the inter-allotment drainage along the rear of the
site.

It should be noted that concentrating stormwater infiltration into soil profiles can lead to instabilities in moderately
sloping areas.

No stormwater runoff should be allowed to flow over any exposed excavated embankment faces or filled batters.

All existing cross allotment flows from neighbouring properties must also be considered, managed and
maintained. Clear unhindered drainage paths must be provided and maintained during and beyond construction.
All constructed retaining walls must have effective drainage measures upslope and beyond the walls to relieve
any sub-surface water pressure/build-up. These drains must be maintained and flushed out regularly. To achieve
this we recommend bringing the upstream end of the drain to surface and capping off to allow future flush out.

We have attached guidelines for hillside construction extracted from Australian Geomechanics vol. 35 March
2000 – “Landslide Risk Management”. These references provide commentary on good design and building
practice.

We trust this meets with your requirements, however should you have any queries on the above matter please
contact the undersigned.


Yours faithfully




Sean Richardson RPEQ 5835
For and on behalf of
SCG CONSULTING ENGINEERS

Encs      Appendix A        -     Some Guidelines for Hillside Construction
          Appendix B        -     Landslip Mechanisms
          Appendix C        -     Landslip Risk Assessment Matrix




 SCG Consulting Engineers                                    5                                     SCG Ref: 30378(SL)