slope stability · MCU22/0172

Integra Partnerships                                                                                 22339-001-Rev0
                                                                                                  13 September 2022

Architectural drawings supplied to Tectonic (Blackwood Architecture and Design, Project No. 202307, Dwg
No’s DA1.01 to DA6.10, dated 8 August 2022) indicate that the proposed residential development will
comprise the following:
          Demolition of the existing residence.
          Earthworks (majority cut) to provide terraced level building pads.
          Construction of a terraced three-storey duplex including a swimming pool.
Construction is likely to comprise a combination of lightweight materials (e.g. timber, sheet metal roof etc.),
rendered brick/masonry blockwork (or similar) and suspended concrete slabs. No earthworks details were
available at the time of reporting; however, provided drawings indicate that excavations up to 2.5 m depth
will be required, and minimal fill earthworks (less than 1.0 m height).
The property has existing connections to town water and sewerage. A site layout plan and an elevation
view of the proposed duplex development are shown in Text Figure 2 below.




Text Figure 2: Proposed site layout (upper) and an elevation view of the proposed residences (lower)

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, slope stability studies and available geotechnical data. 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 condition of existing structures.
The walk-over survey was carried out by an experienced geotechnical engineer from Tectonic on
29 August 2022. The walk-over inspection was combined with a geotechnical investigation comprising
drilling of two boreholes (BH1 and BH2) around the existing residence to a depth of 3.0 m below ground level
(BGL). The approximate locations of the boreholes are shown in Figure 1 attached to this report. In situ




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