35484 Approved Plans Ba · MCU21/0222.01

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 Chris Clout Design and consists of a proposed two storey residential dwelling
with a single level basement.

SITE DESCRIPTION

 

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

- The site is located in an area identified as a ‘Low Landslip Hazard’ on the Noosa Council's Landslip Hazard
Map.

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

- Reference to Sunmap 1:25000 topographic maps confirm the site is located on the upper 4 of the Sunrise
Sand Dune.

- Level contours provided on the proposed building plans indicate an average fall across the site of 3-4%.

Field work has been undertaken which included explorative testpits/boreholes by SCG Consulting Engineers,
together with a walkover of the site by SCG Consulting Engineers.

The borehole logs contained in SCG Consulting Engineers report, (No. 32027(S)) confirms the soil profile to
consist 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 3-4% exist across the proposed
construction site. The measured grades are consistent with the contours indicated
on the proposed construction.

Vegetations : Vegetation consists of scattered trees and grasses.

Slope Shape/Location : The surface profile across the allotments slope faces are generally LINEAR
PLANAR.

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

Stormwater flows from upslope of the allotment will be intersected and captured by
the road reserve.

Earthworks : There is no existing earthworks apparent.

Adjacent Structures : Adjacent structures on the neighbouring properties appear to be a mix of slab on
ground and suspended timber framed and suspended concrete floors.

Evidence of previous : None apparent.
Soil Movements

SCG Consulting Engineers 2 SCG Ref: 32027(SL)