Combined Approved Plans RAL21/0003

                Total Concept Homes                                                                                   20332-001-Rev1
                                                                                                                       22 March 2021

                We have been supplied with a proposed layout plan for the subdivision by CadCon Surveying & Town
                Planning (CadCon, Ref. Dwg. No. 208516-04-01 and 02, dated 1 March 2021), which indicates that it is
                proposed to retain an existing residence on a larger portion of the existing allotment extending to the east
                and south-east. The north-western portion of the allotment would be divided from the existing allotment,
                where a new residence would be located.

                Drawings show that an existing access for the house would be upgraded, initially being shared between the
                two future allotments (over an easement) off Black Mountain Range Road to the west; before splitting along
                the proposed southern boundary of the new lot, extending to the position of the future residence.

                Based on information provided at the time of our assessment, we understand that the driveway alignment
                would be at grade with the existing track, with filling of up to 1.5 m height required towards the central area of
                the alignment. The fill would be retained, and it is understood that the primary design option being
                considered is gabion baskets. Some minor cutting is expected on the upslope side of the driveway to the
                eastern side of the alignment.

                The property does not have access to mains sewerage or a piped, potable water supply, and therefore
                collection of rainwater in tanks and on-site disposal of effluent will be required.

                An extract of the design drawings is given below in Text Figure 2.




                                                                       Proposed subdivision boundary




                                                 Driveway easement



                                                                                              Existing Lot boundary

                Text Figure 2: Extract of overall subdivision layout (courtesy CadCon)

                1.2       Method and Scope of Investigation
                As part of our slope stability assessment, a desk-top study was carried out comprising a review of
                published geological maps, aerial photos, and the following reports:

                          A site classification report by Ground Drill (Ref. Job No. 20/373, dated
                           3 December 2020).
                          An effluent disposal report by Ground Drill (Ref. Job No. 20/373-2, dated
                           22 March 2021).
                Both Ground Drill reports are attached at the end of this report. A walk-over survey was conducted in
                order to make an appraisal of the general condition of the site in regard to topography, drainage, vegetation
                cover, geology, erosion and slope stability and existing structures. The walk-over survey was carried out
                by an experienced engineering geologist from Tectonic on 26 November 2020 concurrent with the drilling
                by Ground Drill. The results of the desk-top study and walk-over survey are included in Section 2 below.

                1.3       Qualifications of Responsible Engineer
                This report has been reviewed by Mr Ashley Davey, an RPEQ with more than 25 years’ experience in
                geotechnical engineering, including a number of slope stability projects.




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Document Set ID: 21426326
Version: 1, Version Date: 24/03/2021