Supporting Technical Assessments

0 100 200 300 400 500 600 700 800 0 60 120 180 240 300 360 Flow rate (m3/s) Time (min) Source 1 Source 2 Source 3 Source 4 Source 5 Source 6 Source 7 Source 8 Source 9 Source 10 Source 11 Source 12 Source 13 Source 14 Source 15 Source 16 OCEANA GOLD (NZ) LTD - WAIHI Storage 3 Tailings Storage Facility, RL155, Dam Breach Hydrographs of Natural Flows (1 in 1,000 AEP) Ref. No: 9216 Date: Jun 2022 Drawn: YW Engineering Geology Ltd Unit 7C, 331 Rosedale Rd, PO Box 301054, Albany Auckland , NZ Ph (09) 4862546 Fax (09) 4862556 Figure A2

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