Supporting Technical Assessments

SECTION 1 Introduction C:\D Data\GWS C Drive\GWS\Client Files\1344 OGL - WKP\4 Deliverables\WUG Effects Summary\June 2022\WNP Groundwater Effects Summary_Final_Rev_0.docx 2 Figure 2 Southern Project Elements 1.2 Overview of Technical Assessments OGNZL has engaged a number of independent consultants to prepare groundwater effects assessments for the project as shown in the diagram below. Figure 3 WNP Hydrogeology Assessment Technical Structure The technical documents are packaged by consultants as follows: - GHD Report (WAI-985-000-REP-LC-0012.Rev0) – Willow Farm, NRS, Gladstone Pit and TSF3 effects assessment. - GWS Report (WAI-985-000-REP-LC-0040. Final_Rev_0) - Project tunnel elements dewatering effects assessment. - GWS Report (WAI-985-000-REP-LC-0030. Final_Rev_0) - Wharekirauponga dewatering effects assessment. - FloSolutions (in progress) - Wharekirauponga numerical modelling & dewatering effects report. - Valenza Engineering (in progress) – Wharekirauponga mine mitigation.

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