Some houses on Shelf Road, Mount Tamborine, have been built on areas contraindicated in Beaudesert Shire
Councils “Town Planning Scheme for the Whole of the Shire of Beaudesert” which relied on the report “Slope
Stability and its Constraints on Closer Settlement on Tamborine Mountain, Southeast Queensland by
W.F.Willmott. Geological Survey of Queensland Record 1981/14, Department of Mines, May 1981.
Fig 1 shows building envelopes extending into areas of landslip risk defined in the “Planning Scheme”. That
allowed houses to be built closer to the cliffs than may be prudent.
Fig 2 shows the D2 and D3 areas referred to in the “Planning Scheme”
Fig 3 is an extract from the “Planning Scheme” referred to above.
+ a picture gallery of rockfalls and instability above houses on Shelf Road.
Our team wishes to point out that the St Bernards proposed development is immediately above and on the
edge of a D3 area outlined in the “Planning Scheme”.
Our simple logic is that if there is danger of a significant landslip from a D3 area then that rock and soil had
to come from above.
If any action by a developer contributes to a landslip, the downstream recipient of the rock and soil would
surely be entitled to take action.
We have provided ample evidence from around the world you can link to, that a development such as is
proposed will destabilize an area designated D3 and which has already suffered a major landslide.
 Fig 1
 2.3.7 Slope and Stability
(a) Intent Council intends that development on Tamborine Mountain should occur in a manner which is compatible with the slope stability characteristics of the Area and gives due regard to the constraints of topography and geology.
(b) Implementation Map DCP-1 Map 3 designates five classifications of slope stability. Council will control development within these five areas in accordance with the provisions of Table 1 and with the development guidelines for the various Land Use Character Areas in Section 3.
The stability classifications indicated on Map DCP-1 Map 3 have been derived from the report Slope Stability and Its Constraints on Closer Settlement on Tamborine Mountain, Southeast Queensland by W. F. Wilmott, Geological Survey of Queensland Record 1981/14, Department of Mines, May 1981.
The slope stability classifications have been generated by correlating known landslides with particular combinations of geology, topography and groundwater conditions. It is not implied that every part of a classification has the same stability, but that a similar range of stabilities is present. The classifications do not guarantee the stability of any particular site on Tamborine Mountain or its scarps. Revision of classification boundaries may occur in the future as new information comes to hand.
In some locations within the Plan Area (refer to Table 1), buildings or other structures may not be erected without certification by a Registered Professional Engineer that the site is stable and slip-free and that this stability will not diminish as a result of site works, to the satisfaction of the Director - Design and Development.
Any application for rezoning, consent or subdivision shall include the consideration of the geotechnical suitability of the land for the proposed development. Further information may be required from the Applicant to determine which classification of slope stability applies to a particular parcel of land.
Council is generally not in favour of development which falls within Classifications C1, C2, D1, D2 and D3 inclusive as shown on Map DCP 1 Map 3. In these areas a geotechnical report will be required for development applications due to concerns with the maintenance of stability. Where allotments are adjacent to land designated in the C or D classifications, the Council may still require a geotechnical report, due to concerns with the maintenance of stability on the adjacent classified allotments.
This geotechnical suitability shall be demonstrated by a geotechnical report prepared by a suitably qualified and experienced geotechnical engineer and shall have particular regard to:
1 the identification of building foundation sites and the suitability of the site for cut and fill type
development, and where a building site contains slopes greater than 25% then consideration
shall be given to the suitability of that site for alternative building structures (such as, but not
limited to, pole houses)
2 the disposal of stormwater and liquid waste disposal
3 all weather access to each development, allotment, or each building or activity site within each allotment
4 potential difficulties associated with the clearing of vegetation and the desirability of rehabilitation -
such as clearing of vegetation for bushfire management.
Fig 3 An extract from the “Planning Scheme” referred to above.
Workers secure large rock close to house on Shelf Road. Chains and other securing methods "Just in case"
Large rock fell Jan 2008.
This one bounced across Shelf Road, Jan 2008.
   
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