Boffa Miskell Ltd | Waihi North Project | Landscape and Visual Effects | 59 • Replacing the current mobile and small jaw crusher with a SAG Feed Crusher (Modular Primary Crusher) obtained from the Reefton Mine. • Replacing the existing Semi-Autogenous Grinding (SAG) Mill with mill obtained from the Reefton Mine. The highest part of the SAG Mill will reach 9 metres; • Upgrading the existing leach circuit including replacing an existing 17 m diameter thickener with a 26 m diameter thickener and installing three additional 1,500 m3 leach tanks. Each tank will reach 14.3 m in height and a diameter of 12.2 metres; • Installing a new interconnecting conveyor for transporting waste rock to the NRS; • Establishing a new explosives magazine to the north-east of TSF2; • Installing a new substation and 11 kV switchroom; • Relocate the existing LPG tanks to the east of the Ohinemuri River; and • Proposed cutbacks and constructing a new WUG portal to provide direct access to the Wharekirauponga Underground Mine and replacement of the MUG portal to accommodate GOP. The Processing Plant will continue to operate 24 hours per day, 7 days per week. Improved lighting will be installed along the existing conveyor, at the crusher and the SAG Mill and installed to ensure the level of lighting measured at the boundary of any site not owned by OGNZL (or not subject to an agreement with OGNZL) is no greater than 8.0 lux. The upgraded Water Treatment Plant will nearly double in size to accommodate additional water treatment streams required for the project. Established Discharge Outfalls on the bed of the Ohinemuri River are proposed to be reconsented as part of this work. The additional equipment for the Water Treatment Plant (tanks and clarifiers) required for the expansion will be identical in size to the existing equipment. A buried services trench is also proposed to connect the Willows Road site to the existing Processing Plant. This will carry power, fibre optic for communications, and several waste and potable/raw/recycled water services. This will be buried on OGNZL land and along the margins of the State Highway 25 and Willows Road corridors with the exception of river crossings integrated with existing bridge structures. Once buried, the existing landcover will be reinstated ensuring negligible potential landscape and visual effects. 9.3 Landscape Effects The proposed upgrade to the existing Processing Plant and WTP will remain contained in the context of an established Processing Plant. In this context the potential for any landscape effects beyond the immediate site context remain very limited. The final configuration of the Processing Plant and WTP seeks to improve the efficiency of ore processing and maintain adequate water treatment capacity and is unlikely to generate any adverse landscape effects beyond the immediate site context. Forming an underground tunnel connection with the Willows Road site and WUG Mine avoids any potential landscape effects as a result of this aspect of the project. 9.3.1 Landscape Effects Assessment An assessment of the level and nature of landscape effects associated with the proposed upgrade to the existing Processing Plant is set out below:
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