Reference Document - MCU26 0001 & OPW26 0002 - AS PUBLISHED · MCU26/0001

        1.              Introduction
        This report details the results of a geotechnical investigation undertaken for the proposed residential unit
        development at 17 Bottlebrush Avenue, Noosa Heads. The investigation was performed by Tectonic for
        Made One Pty Ltd, generally in accordance with Proposal P25626-Rev0, dated 16 December 2025. Recor
        are the structural consultants and project managers for the build.
        The investigation comprised drilling of boreholes at two locations and a single standalone dynamic cone
        penetrometer (DCP) test, across accessible areas of the development footprint. This report summarises
        the results of the investigation and provides geotechnical recommendations regarding earthworks and
        footings, together with temporary and permanent basement retention. In summary, subject to the
        implementation of the recommendations made herein, it is assessed that there should be a Low Risk of
        slope instability affecting the proposed development in accordance with the Australian Geomechanics
        Society Guidelines for Landslide Risk Management, dated March 2007 (AGS 2007).



        2.              Proposed Development
        Preliminary architectural drawings were supplied to Tectonic (Ref. Blackwood Architecture, Project No.
        202612, Sheet Nos. DA1.01 to DA6.05 [not inclusive], Issue A, Dated 11 December 2025). These plans
        indicate that the development will comprise a three-storey unit building, over a single level basement
        carpark. Construction will include a combination of masonry and lightweight materials, suspended
        concrete floors, and pools on both the second level and roof.
        No earthworks details were provided at the time of reporting; however, the plans indicate that
        excavations for the basement would likely be in the order of about 5 m deep to the rear, with the cut
        daylighting at the front. Localised filling of less than 1 m high is anticipated. Excavations will extend
        close to the site boundaries on the northern and southern sides, and therefore, some form of temporary
        retention will likely be required. Isolated deeper excavations may be required for the lift overrun pit and
        other elements. A basement layout plan and 3D render view are shown in Text Figure 1 below.




                Text Figure 1: Basement level layout plan (LHS) and 3D render (RHS), courtesy of Blackwood
                                                        Architecture




        Geotechnical Investigation
        30 January 2026 | 25408-001-Rev0                                                                              1
Document Set ID: 25158026
                  24528612
Version: 1,
         2, Version Date: 10/09/2026
                          13/02/2026