June 2022 G-14642.71-006-R-Rev0_FINAL vii Figure 15: Lapilli tuff recovered as gravel from WNDD008. .....................................................................................................24 Figure 16: Geological plan of Wharekirauponga deposit showing relative position of WKP-P05D at the location of Drillsite 6 (bottom right on figure). .......................................................................................................................... 28 Figure 17: Proposed cutback and Waihi plant site to Willows Access Tunnel location (OGNZL). 'WKP portal' shows the proposed portal location. ............................................................................................................................................31 Figure 18: Proposed tunnel alignment corridor between Waihi and Willows Connection (supplied by OGNZL). ...........................................................................................................................................................................................................................32 Figure 19: Waihi geological map showing the proposed tunnel alignment options. aw = Waipupu Formation, ah = Whiritoa Andesite and tm = alluvium, red lines = extensive hydrothermal alteration. .......................................................................................................................................................................................................................................................33 Figure 22: Geological cross section through the Wharekirauponga deposit showing the relationship between the target EG vein and T-Stream vein. Tunnel access to the mine will be from the footwall side (right in this view) (source OGNZL). .................................................................................................................................................... 38 Figure 23: Conceptual underground mine design showing key elements of the mine (supplied by OGNZL)................................................................................................................................................................................................................................... 38 Figure 24: Summary of Q' and GSI values calculated from the available geotechnical data (from OGC PFS study - Appendix D). ...........................................................................................................................................................................40 APPENDICES Appendix A Report Limitations Appendix B Conceptual Geological Model Data Report (GHD 2020) Appendix C Geotechnical Logs for Willows Road Access Tunnel Appendix D WKP PFS – Geotechnical Section (OceanaGold) Appendix E Post-Closure Structural Capping of Shaft Openings (WSP 2022)
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