1080 1090 1100 1110 1120 1130 1140 1150 1160 1170 1180 1190 1200 NORTHERN ROCK STACK SECTION 2 2 715 scale 1:2500 Original Ground Zone A 0.75m Thick Deplete and reprofile Northern Stockpile material RL163.0 RL153.0 RL173.0 Zone G Zone F Zone H See Detail A RL163.0 RL153.0 RL143.0 RL133.0 RL123.0 RL113.0 Existing subsoil drains REHABILITATION DETAILS NTS Zone H Zone G Zone F A - Approx. 50m 1 716 Conveyor Perimeter Road Perimeter Drain Northern Uphill Diversion Drain 1 3 1 1.5 Estimated maximum closure profile. See Dwg. 0782 1.5 min 1.5 min 0.5 min 2 716 2 770 RL Toe Drain Foundation toe key cut to rock Toe leachate drain 2 772 New leachate drain Collection sumps for subsoil and leachate drains New subsoil drain Zone F Estimated maximum operation profile Zone E Zone D3 Zone D2 Zone D2 NRS Fill OCEANA GOLD NZ LIMITED JOB NUMBER: ORIGINAL SCALE: A3 SIZE: DRAWING No. DATE TITLE BY PROJECT APPR. DESIGNED CHECKED DRAWN DESIGN APPR. APPROV. CHECKED REVISION DATE BY No. C COPYRIGHT written approval from in any way without prior and may not be copied OCEANA GOLD NZ LIMITED the property of This drawing remains REV. No. Preliminary Issue Tender Issue Construction Issue Signed: Signed: Signed: Date: Date: Date: PROJECT: AREA: DEVELOPMENT SITE Sections Northern Rock Stack Tails / Waste Rock 080 WAI-983-080-DWG-CI-0717 E 9018 as shown Northern Rock Stack A JL 09-09-20 Preliminary Issue ET TM B JL 15-02-21 Change Zone A Thickness and Label ET TM C MC 15-07-21 WNP NRS Design Change ET TM MC ET ET TM Ground profile Existing ground profile Original ground profile Survey before fill placed in existing Northern Stockpile Estimated maximum closure profile Proposed design Leachate drains Subsoil drains 15-07-21 15-07-21 15-07-21 15-07-21 15-07-21 D JL 19-07-21 Changed Zone G,H and F ET TM Notes 1. Positions and levels of subsoil and leachate drains are indicative only. E ET 12-10-21 Added Zone D2, D3, E TM TM
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