Figure 3.6 Job Number Revision 0 12552081 N:\NZ\Christchurch\Projects\51\12526951\GIS\Maps\Deliverables\12552081\12552081_Z003_GladstoneHYD_EastWest.ai © 2021. Whilst every care has been taken to prepare this map, GHD make no representations or warranties about its accuracy, reliability, completeness or suitability for any particular purpose and cannot accept liability and responsibility of any kind (whether in contract, tort or otherwise) for any expenses, losses, damages and/or costs (including indirect or consequential damage) which are or may be incurred by any party as a result of the map being inaccurate, incomplete or unsuitable in any way and for any reason. Date 07 Dec 2021 Data source: GHD. Created by:jrprice Level 3, 138 Victoria Street, PO Box 13 468, Christchurch 8141, New Zealand T 64 3 378 0900 F 64 3 378 8001 E [email protected] W www.ghd.com Oceana Gold Limited Waihi North West - East Model Cross Section LEGEND Volcaniclastic Weathered Andesite Shallow Groundwater Flow Direction Rainfall Runoff Wetland / tributory Proposed Gladstone Pit Potentiometric groundwater level Groundwater Recharge Sandy Ignimbrite Hydrothermal Breccia Andesite Ash / Regolith FVN Dacite RT EAST Distance (m) 50 0 Favona vein system dewatered Ohinemuri River (OH6) Ohinemuri River (OH3) P79 P79s (Ignimbrite) K = 1.3x10-5 m/s P79i (clay rich Ignimbrite) K = 2.7x10-7 m/s P79d (Andesite) K = 4.2x10-7 m/s P68 P68d (representative of Sandy Ignimbrite) K = 1x10-5 m/s Ohinemuri River (OH6) P68s (Ash / clay) K = 6x10-6 m/s ? ? ? ? ? 100 150 200 250 300 350 400 450 500 550 600 650 700 750 800 850 900 950 1000 1050 1100 1150 1200 1250 1300 1350 1400 1450 950 970 990 1010 1030 1050 1070 1090 1110 1130 1150 1170 Level (m RL) WEST Gladstone vein system inferred to be predominantly dewatered Rainfall recharge Infiltration Dacite Shallow groundwater system Andesite Rock Deeper groundwater system Proposed Pit Shallow groundwater flow direction Run-off Shallow GW system Ignimbrite RT RT VC Breccia Weathered Andesite Infiltration to deeper groundwater Upward vertical gradient at GLD04 Deep regional GW flow direction (inferred to west)
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