2 Oct 2021 OceanaGold Waihi North Project – Archaeological / Heritage Assessment Overall the effects on historic heritage after recommended mitigation are likely to be less than minor in relation to the proposed Services Trench. Gladstone Open Pit (GOP), WUG Portal and Processing Plant areas • The Gladstone Open Pit will affect and remove part of the Winner Hill gold mining complex and pre-1900 historic workings (T13/820) and part of the Gladstone Hill gold mining complex and pre-1900 historic workings (T13/821). Other, so far unidentified, subsurface remains relating to mining activities are likely to be present and may be exposed as part of the proposed GOP. • A small section of Lower Level Water Race (T13/817) will be affected and removed by the proposed southern stock pile associated with the Gladstone Pit. • Harvesting of mature pine trees on the southern extent of Winner Hill may impact on the Low Level Water Race (T13/817). • No archaeological features of Maori origin have been identified on Gladstone Hill or Winner Hill, and within the proposed GOP. It is considered unlikely that any such features would have survived within the project area as a result of modern mining and farming activities. Overall the effects on historic heritage after recommended mitigation are likely to be minor in relation to the proposed WUG. Tailings Storage Facility (TSF3) • The proposed TSF3 will have no direct physical impact on any known archaeological or historic heritage items. It is highly unlikely that old underground workings exist in this area, or any other features associated with historical mining activity. • There are no known pre-European Maori sites within the TSF3 footprint. Overall the effects on historic heritage after recommended mitigation are likely to be nilless than minor in relation to the proposed TSF3 Northern Rock Stack (NRS) • The NRS and associated infrastructure will not directly impact on the Queen of Waihi Shaft (T13/971) but and due to safety reasons, it will be backfilled and capped. • Other, so far unidentified, subsurface relating to mining activities within areas of undergrowth or topsoil, may to be present and exposed as part of the proposed NRS. • There are no known pre-European Maori sites within the NRS. Overall the effects on historic heritage after recommended mitigation are likely to be less than minor in relation to the proposed NRS
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