W7412 sl

Assessment of development impacts and treatment of the cut and filled areas.

Where the site is to be located, the site is near level and there is a cut batter to the west of
the proposed construction site, facing uphill. The are immediately downhill form the
proposed siter is near level.

The construction site is to have a spoon drain or diversion mound on the high side of the
house area to divert water away from the proposed dwelling.

Given the treatment of this site to be as recommended above - he overall effect of the
development on site stability is negligible .

Measures recommended to mitigate impacts

The measures to mitigate the impacts of the proposed dwelling are the diversion of water
away from the cut area using a spoon drain and or mound and the limiting of the fill batter
and fill batter slope.

No additional measures are required to mitigate impacts of the proposed construction on
the site.

Summary and Conclusions

Below is a chart of landslip risk by The Australian Geomechanical Society,
“Landslip Risk Management Concepts and Guidelines" published by The Australian
Geomechanical Society. Australian Geomechanics Society. Australian Geomechanics
Society.

                        TABLE 1 – RISK LEVEL IMPLICATIONS

Risk Levels.
VH                  VERY HIGH RISK                      Extensive detailed investigation and
                                                        research, planning and implementation
                                                        of treatment options essential to reduce
                                                        risk to acceptable levels – may be to
                                                        expensive and impractical.
H                   HIGH RISK                           Detailed investigation, planning and
                                                        implementation of treatment options
                                                        required to reduce risk to acceptable
                                                        levels
M                   MODERATE RISK                       Tolerable provided treatment plan is
                                                        implemented to maintain or reduce risks.
                                                        May be accepted.
L                   LOW RISK                            Usually accepted. Treatment
                                                        requirements and responsibility to be
                                                        defined to maintain or reduce risk.

VL                  VERY LOW RISK                       Acceptable. Manage by normal slope
                                                        maintenance procedures.




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