Supporting Technical Assessments

iii Tables and Figures Table 1 WNP Summary of Effects by Element ..........................................................................3 Table 2 Predicted Groundwater Discharge from Gladstone TSF ............................................24 Figure 1 Northern Project Elements...........................................................................................1 Figure 2 Southern Project Elements...........................................................................................2 Figure 3 WNP Hydrogeology Assessment Technical Structure ..................................................2 Figure 4 EG and T Stream Veins and Proposed Underground Development ............................4 Figure 5 Proposed Underground Mine Development................................................................4 Figure 6 Geological Plan Showing Surface Rock Types...............................................................5 Figure 7 Geological Plan Showing Surface Rock Types...............................................................5 Figure 8 Extent of Rhyolite Surface Exposure within the Otahu Catchment .............................6 Figure 9 Wharekirauponga Conceptual Hydrology ....................................................................7 Figure 10 Groundwater Discharge Locations Identified from Water Dating and Flow Rates ..7 Figure 11 Wharekirauponga Conceptual Groundwater Model ................................................8 Figure 12 Extent of Near Surface Drawdown Effects ...............................................................9 Figure 13 Access Tunnel Layout..............................................................................................11 Figure 14 Willows Farm Access Tunnel...................................................................................13 Figure 15 Willows Temporary Rock Stack...............................................................................13 Figure 16 Willows Farm Investigation Locations, Piezometric Surface and Access Tunnel ...14 Figure 17 Willows Farm Conceptual Hydrogeologic Model ...................................................15 Figure 18 WUG Access Tunnel Location ................................................................................17 Figure 19 Geologic Profile Along WUG Access Tunnel Alignment..........................................18 Figure 20 WUG Access Tunnel Conceptual Hydrogeologic Model .........................................18 Figure 21 Proposed Gladstone Open Pit................................................................................20 Figure 22 Site Investigation Locations ....................................................................................21 Figure 23 Gladstone Hill Conceptual Groundwater Model ....................................................22 Figure 24 Gladstone Hill Zone of Dewatering Plan.................................................................23 Figure 25 Gladstone Hill Zone of Dewatering Section ............................................................23 Figure 26 Gladstone Hill Dewatered Section ..........................................................................24 Figure 27 Gladstone TSF Section.............................................................................................25 Figure 28 Proposed NRS Layout..............................................................................................26 Figure 29 NRS Surface water and Groundwater Investigation Locations ..............................27 Figure 30 NRS Geologic Section ..............................................................................................27 Figure 31 NRS Section Following Closure ...............................................................................28 Figure 32 Proposed TSF3 Layout.............................................................................................29 Figure 33 TSF3 Long Section ...................................................................................................29 Figure 34 TSF3 Site Characterisation ......................................................................................30 Figure 35 TSF3 Conceptual Hydrogeologic Model ..................................................................31 Figure 36 TSF3 Groundwater Flow Paths During and Following Construction ......................33

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