Geotechnical Investigation Report

J001369-001-R-Rev0                                                                                   August 2021


1.0     INTRODUCTION
As requested by RG Strategic, Core Consultants Pty Ltd (Core) has carried out a geotechnical investigation
for a proposed development at 23 Bottlebrush Avenue, Noosa Heads.
Presented in this report are the investigation results together with a qualitative slope stability assessment
and comments regarding:

 ▪     Site preparation and trafficability.
 ▪     Filling and compaction.
 ▪     Excavatability and temporary excavation support.
 ▪     Foundation design and parameters.
 ▪     Retaining wall design parameters.
 ▪     Drainage and general foundation maintenance.

2.0     PROPOSED DEVELOPMENT
Preliminary concept drawings were provided by the client (refer Drawing No. A202, dated 13 July 2021).
Based on these drawings we understand the proposed development will comprise a three-level apartment
development with a single-level basement and associated driveway, visitor carparking, courtyard and pool. It
is anticipated that earthworks will generally include cuts of between 2 m and 5 m depth and minor filling to
form finished surface levels.

3.0     SITE DESCRIPTION
The site is described as Lot 140 of RP88934 and covers an area of about 506 m2. The site is bounded by
Bottlebrush Avenue to the south-west and residential units and houses elsewhere. At the time of our
investigation there was an existing brick dwelling with an associated concrete driveway and footpath. The
dwelling was generally surrounded by scattered large trees and vegetation. Further details regarding site
conditions are given in Section 5.0.
The site generally slopes down to the south-west between about 10° and 12°, with the lower portion and
driveway steeper at about 18°. Available survey drawings (refer Drawing No. 12831-DTM-01, dated 25
March 2021) generally confirms the on-site slope measurements. Elevation levels across the site ranged
from between RL 37 m and RL 31 m. Image 1 below shows an extract of the abovementioned survey
drawing.
Photographs 1 to 3 show the general site conditions at the time of our investigation.




Image 1: Extract from survey drawings 12831-DTM-01 (dated 25 March 2021).

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