Attachment 12 - Geotechnical Investigation Report

                                               PROPOSED RETIREMENT DEVELOPMENT
                                               MYALL STREET, COOROY

TABLES
Table 1: Summary of Atterberg Limits, Percent Fines, and Shrink-Swell Index Laboratory Results ................................... 7

Table 2: Summary of CBR Laboratory Results ................................................................................................................... 7

Table 3: Effect of inert engineered fill in reducing characteristic ground surface movement ............................................. 10

Table 4: Retaining Structure Design Parameters .............................................................................................................. 12


TEXT FIGURES
Text Figure 1: Extract from layout masterplan (courtesy Westera) ..................................................................................... 1

Text Figure 2: Extract of DSQ Survey Plan showing recent aerial image and 0.5 m contours ............................................ 2

Text Figure 3: View from borehole BH5/low-lying ground looking south ............................................................................. 3

Text Figure 4: View looking north / downslope from higher ground on site (approx to borehole BH8) ................................ 3

Text Figure 5: Looking north from lower lying ground at southern boundary....................................................................... 3

Text Figure 6: View of proposed RV compound area to north-west of site (borehole BH10), looking east towards
          creek .................................................................................................................................................................. 4

Text Figure 7: 4WD ute auger drill rig bogged to north-west of site; and creek in north-west corner .................................. 4



FIGURES
Figure 1: Site Plan



APPENDICES
APPENDIX A
Borehole Reports and Explanatory Notes

APPENDIX B
Geotechnical Laboratory Test Certificates

APPENDIX C
Limitations




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