Attachment 12 - Geotechnical Investigation Report

                                            PROPOSED RETIREMENT DEVELOPMENT
                                            MYALL STREET, COOROY

Table of Contents

1.0   INTRODUCTION ........................................................................................................................................................ 1

2.0   PROPOSED DEVELOPMENT ................................................................................................................................... 1

3.0   SITE DESCRIPTION .................................................................................................................................................. 2

4.0   METHOD OF INVESTIGATION ................................................................................................................................. 5

      4.1         Fieldwork ...................................................................................................................................................... 5

      4.2         Laboratory Testing ........................................................................................................................................ 5

5.0   INVESTIGATION FINDINGS ..................................................................................................................................... 6

      5.1         Geology ........................................................................................................................................................ 6

      5.2         Subsurface Conditions.................................................................................................................................. 6

      5.3         Geotechnical Laboratory Test Results .......................................................................................................... 7

6.0   ENGINEERING ASSESSMENT ................................................................................................................................ 8

      6.1         Earthworks .................................................................................................................................................... 8

      6.1.1            Site Preparation ...................................................................................................................................... 8

      6.1.2            Trafficability ............................................................................................................................................. 8

      6.1.3            Excavations ............................................................................................................................................. 8

      6.1.4            Filling....................................................................................................................................................... 9

      6.2         Building Foundations .................................................................................................................................. 10

      6.2.1            Indicative Site Classification.................................................................................................................. 10

      6.2.2            Footing Design ...................................................................................................................................... 11

      6.2.2.1             Residential Allotments ....................................................................................................................... 11

      6.2.2.2             Club House ........................................................................................................................................ 11

      6.2.2.3             General .............................................................................................................................................. 11

      6.3         Retaining Structures ................................................................................................................................... 12

      6.4         Pavement Design Parameters .................................................................................................................... 13

      6.5         Groundwater and Drainage ........................................................................................................................ 13

      6.6         Supplementary Site Investigation ............................................................................................................... 14

7.0   LIMITATIONS .......................................................................................................................................................... 14




17 May 2019
Report No. 19071-001-Rev0                                                              iii