4. 220148 - Slope Stability Report (2) · 132006.2554.01

Seachange Builders                                                                          22134-001-Rev0
                                                                                               26 April 2022




Text Figure 7: Existing empty pool (LHS) and northern side of house (RHS)



3.0     ASSESSMENT OF LAND STABILITY
3.1   Existing Conditions
The Noosa Planning Scheme 2020 includes a landslide hazard overlay map (Ref. extract in Text Figure 8),
which indicates that the eastern part of the site has a Moderate (pale brown shading) landslide hazard.


                                            Subject Site




Text Figure 8: Extract from NC landslide hazard overlay mapping

It should be noted that the Noosa Council landslide hazard map is a broad-scale indication of potential
landslide susceptibility and is superseded by this site-specific assessment. No visual signs of global slope
instability were observed across the site or adjacent areas. No landslide back scarps, groundwater
springs, or areas of naturally ‘hummocky’ ground were observed. Review of historical aerial photos from
NearMap and QImagery, at least one every decade back to the 1950’s, indicates that the foredune area
adjacent to the site has remained relatively intact over that period, and does not appear to have been
subjected to substantial erosion over a period of at least 70 years to date.




                                                           6/12