Approx. 50m Zone A 0.75m thick 1080 1090 1100 1110 1120 1130 1140 1150 1160 1170 1180 1190 1200 RL Property Boundary Perimeter Road Perimeter Drain Haul route access Slope locally steeper for haul road Foundation toe key cut to rock Toe Drain Toe leachate drain 1 1.5 RL113.0 RL123.0 RL133.0 RL143.0 RL153.0 RL163.0 1 3 RL173.0 Estimated maximum closure profile. See Dwg. 0781 RL163.0 RL153.0 Existing Ground Surface Perimeter Road Perimeter Drain Northern Uphill Diversion Drain REHABILITATION DETAILS NTS Zone H Zone G Zone F A - 1.5 min 1.5 min 0.5 min Zone G Zone F Zone H See Detail A NORTHERN ROCK STACK SECTION 1 1 715 scale 1:2500 1 717 1 770 1 772 2 717 Existing leachate drain to be repositioned Existing leachate drain New leachate drain Existing subsoil drains New subsoil drain New leachate drain New leachate drain Estimated maximum operation profile Existing subsoil drain Collection sumps for subsoil and leachate drains Rehabilitate surface Zone F Zone E Zone D3 Zone D3 NRS Fill Zone D2 Zone D2 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-0716 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 Ground profile Existing ground profile Original ground profile Survey before fill placed in existing Northern Stockpile MC ET ET TM 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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