Scg 30206(Sl) · MCU20/0073

INTRODUCTION

SCG Consulting Engineers have been commissioned to provide a Slope Stability Assessment for the above
allotment. The assessment considers only the existing state of the allotment and any possible effects that the
proposed works will have on this site.

The proposed works are detailed by Kidd & Co Designers in plans 1802 drawings SD.101 thru to SD.602 dated
February 2020 and consists of multi level units with basement carparking.


SITE DESCRIPTION

A desk top study of the site confirms the following:-

   -   The site is located within an area on the Noosa Council’s Landslip Hazard Map 1.3 (5 November 2010).

   -   Reference to the Australian Geological Map 1:100000 Gympie Special confirms the site is located within
       the Pleistocene Dune of the late Quaternary period, consisting of Quartz Sand.

   -   Reference to Sunmap 1:25000 topographic maps confirm the site is located on the Sunshine Beach
       Primary Dune.

   -   Level contours provided on the proposed building plans indicate an average fall across the site of 5-10%.
       Maximum grades in the order of 20º occur outside the eastern boundary of the site within the road reserve.

The soil profile for the site consists of the following –

                            :   LOOSE SILTY SANDS INCREASING IN DENSITY WITH DEPTH

Our walkover confirmed the following characteristics-

Site Slope                  :   A visual assessment of the surface grades within the allotment using a hand held
                                inclometer suggests grades in the order of 5-10% exist across the proposed
                                construction site. The surface grades within the road reserve increase to 20%. The
                                measured grades are consistent with the contours indicated on the proposed
                                construction plans.

Vegetations                 :   Vegetation consists of grasses and scattered trees.

Drainage                    :   The surface drainage is good, sub-surface drainage is good.         There was no
                                indication of ground water seepage or rising water pressure.

Earthworks                  :   Several building platforms exist across the site.

Adjacent Structures         :   Adjacent structures on the neighbouring properties appear to consist of slab on
                                ground construction.

Evidence of previous        :
Soil Movements                  None evident.


LANDSLIP MECHANISMS

Landslip is generally defined as the movement of a mass of rock or soil down a slope.

It is generally considered to occur when the strength of the soil or rock mass to support itself is exceeded causing
movement to occur within the mass.




 SCG Consulting Engineers                                    2                                  SCG Ref: 30206(SL)