Supporting Technical Assessments

Mining Exploratory Drive Calibration, simulation, Reporting Data analysis Field Program - Data Collection Key Steps Lodge Application s92 RFI Site Preparation Test Analysis Incorporate baseline, calibration and simulation Model Reporting Submissions Notifcation Phase 1: Shallow Piezometers Dynamic Model Reporting June 2022 July 2022 August 2022 Baseline WQ & WL Data Shallow Piezometers Hydraulic Testing (Slug Tests) Infltration Tests Test Analysis May 2022 Time Series WQ & WL Data Establish Baseline Analyse Time Series Data (ongoing) Incorporate time series and recalibration Hearing Q3 2022 Q4 2022 Q1 2023 Q2 2022 Q2 2023 WKP - 02 - 110 / 310 starts 20/06/2022 WKP - 01 120 / 200 starts 04/07/2022 WKP - 01 VWP Inclined 90 / 160 / 34 starts 18/ 07/2022 WKP 110D Inclined 170 / 285 / 470 starts 20/06/2022 WKP 04 15 /40 starts 20/06/2022 November 2022 December 2022 Quarter 1 2023 Quarter 2 2023 July 2023 Phase 2: Near Stream Piezometers Shallow Piezometers Hydraulic Testing (CH and CR Tests) September 2022 October 2022 #1 Upper: Piezo 1-1, Piezo 1-2 #2 Upper: Piezo 2-1. Piezo 2-2 #3 Central: Piezo 3-1, Piezo 3-2 #4 Central: Piezo 4-1, Piezo 4-2 #5 Lower: Piezo 5-1, Piezo 5-2 #6 Lower: Piezo 6-1. Piezo 6-2 #7 East: Piezo 7-1, Piez0 7-2 #8 East: Piezo 8-1, Piezo 8-2 #9 TBA: Piezo 9-1, Piezo 9-2 #10 TBA: Piezo 10-1, Piezo 10-2 #11 TBA: Piezo 11-1, Piezo 11-2 #12 TBA: Piezo 12-1, Piezo 12-2 Hearing preparation Further Data Acquisiton Pre-development Mitigation Measures Monitoring and Post-development mitigation measures Trial Testing Ongoing Data Acquisition Trial Testing Pre-development and Post-development Mitigation Measures Ongoing Monitoring to meet TARP requirements WUP Resource Consent Pathway to Hearing Phase Decision Making Phase Exploration and Pre-D​ evelopment Phases August 2024 - August 2026 August 2026 - 20XX Further data acquisition, trial testing, conceptualisation, numerical modelling, development of water management plans and associated TARPs • Use of telemetric instruments to limit impact • Ongoing baseline data collection • Continued implementation of monitoring program • Conceptual modelling to identify groundwater inflows • Mine Groundwater Management Plan • Trigger action response plan (TARP) • Observational method and adaptive management • Control of groundwater inflows into decline and drives • Iterative narrow scale numerical modelling if required by TARP and Observational method August 2023 - July 2024 Mining (Operational) Phase

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