41 Oct 2021 OceanaGold WNP Project, Waihi - Archaeological / Heritage Assessment GLADSTONE OPEN PIT (GOP), MUG AND WUG PORTALS, AND PROCESSING PLANT AREAS The Proposal The proposed GOP involves open pit mining situated predominantly over Gladstone Hill and part of Winner Hill from development and production through to closing of the pit as a tailings storage facility. The pit will disturb an area of around 18.7ha, will be 95m deep, 375m wide and 625m long. This area is located in rolling farmland / pasture with a small pine plantation to the southwest (Figure 41 and Figure 42). The mining of GOP comprises: • Pre-stripping of topsoil from the pit footprint and storage at Southern stockpile (capacity: 52,500 m3); • Harvesting of pines on Winner Hill; • Relocating the existing Favona portal and associated infrastructure within GOP; • Installing a new crusher and interconnecting conveyor for transporting waste rock to the NRS; • Establishing a new Portal “WUG Portal”; • Realigning the gravel road from the end of Clark Street to access the motocross track; • Hauling and storing ore and/or waste rock at the existing polishing pond stockpile, if required; • Construction of noise bunds or screens around the pit rim, where required and; • Upgrade of the WTP requiring additional discharge outfall infrastructure into the Ohinemuri River mainly along Domain Road (unformed) road reserve.
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