B-2 – Area 2 - Assessment of Environmental Effects 71 5.13 HISTORIC HERITAGE EFFECTS An assessment of the potential effects of the Waihi North Project on historic heritage values is provided in Clough (2022), a copy of which is provided in Part H of these application documents. The Willows SFA will remove a section of the Mataura or Waihi Gold Mining Co. Water Race, which is a recorded archaeological site T13/961. The WRS at the Willows SFA will remove a section of the High-Level Walmsley Timber Tramway located above and south and west of the tunnel portal. This tramway has been recorded as T13/963 in the NZAA site record file, although it was constructed in the early 20th century. Clough (2022) recommends archaeological investigation and recording of any archaeological remains affected and uncovered during earthworks associated with the Willows SFA. This will be a requirement of the Archaeological Authority required under the Heritage New Zealand Pouhere Taonga Act 2014 (“Heritage Act”) for the works given they could impact on pre-1900 subsurface remains. Overall, the effects of these actions on historic heritage are assessed to be minor and suitably addressed through the Heritage Act process. No additional restrictions need to be imposed through this process. 5.14 EFFECTS FROM THE STORAGE AND USE OF HAZARDOUS SUBSTANCES An assessment of the potential effects resulting from the storage and use of hazardous substances associated with the establishment and operation of the Willows Portal, is provided in Tonkin and Taylor (2022a), a copy of which is provided in Part H of these application documents. The key risks identified for the activities in Area 2 include: Risk to people or property from fire or detonation at the explosives magazines, oxidiser storage area or diesel tanks; Risk to ecosystems from a spill of diesel during tank filling or equipment refuelling; and Risk to ecosystems from a spill of packaged goods during unloading to site. The risks to people, property and the environment from an unintended detonation at the proposed explosives storage locations is assessed as low and will be managed through site and equipment design (e.g. separation distances to offsite locations and other explosives stores, provision of fire protection systems and certification of the explosives storage magazines) and management controls (personnel access restrictions, security monitoring, staff training and handler certification, and emergency response plans).
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