EGL Ref: 9049 23 June 2022 Page x File: WAI-985-000-REP-LC-0050-Rev0.docx This report shall only be read in its entirety. 5.0 GROUND SETTLEMENT MEASUREMENTS AND PREDICTIONS 18 5.1. Settlement effects 1989 to 2021 18 5.2. Project Martha settlement effects 20 5.3. Settlement exceptions to predictions 20 5.3.1. Gladstone Road 20 5.3.2. Slevin Street 20 5.3.3. Correnso Area 21 5.3.4. Favona Underground Mine 21 6.0 ASSESSMENT OF GROUND SETTLEMENT EFFECTS – WAIHI NORTH PROJECT 21 6.1. General 21 6.1.1. Gladstone vein dewatering south of GOP 22 6.1.2. Potential dewatering in the andesite by the MUG decline 24 6.1.3. Wharekirauponga Access Tunnel decline behind Boyd Road and Barry Road 25 6.1.4. Wharekirauponga Access Tunnel east of Waihi East 26 6.1.5. Depressurisation around the Willows Access Tunnel and Wharekirauponga Dual Tunnel 27 6.1.6. Dewatering around ventilations shafts 28 6.1.7. Dewatering due to the development of WUG 29 6.1.8. Additional settlement and groundwater monitoring locations 30 7.0 REBOUND 30 8.0 SUMMARY OF EFFECTS, MITIGATIONS AND RECOMMENDATIONS 31 9.0 CONCLUSIONS 35 REFERENCES 37 TABLES 39 FIGURES 41
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