U:\2021\BM210482_IBo_Waihi_North_Project\Documents\WNP_Freshwater_Report_May_2022\FINAL_Freshwater_Re port_FOR DELIVERY_June 2022\FINAL DELIVERED 17 JUNE 2022\WAI-985-000-REP-LC0007_Rev0_Freshwater_20220621_FINAL.docx Effects of WNP A summary of the ecological values and effects of WNP are summarised below: Feature Ecological value Effect Magnitude of effect Effects management Level of effect with management Willows Road Farm Tributary 2 Low Reclamation of 390 m of stream habitat High Offset with stream enhancement and rehabilitation following removal of rock stack Very low Instream works Low Fish salvage Very low Reduced aquatic connectivity Low Offset with stream enhancement Very low Mataura Stream High Earthworks and sediment discharge Low Settlement and treatment prior to discharge Low High Contaminant water management Low Treatment at WTP Low Gladstone Open Pit Headwater gully Moderate Loss of 47 m of intermittent stream length (~47 m2) High Offset with stream enhancement Low Loss of 0.14 ha of riparian vegetation Moderate Offset with riparian enhancement Low Reduced aquatic connectivity Very Low Offset with riparian enhancement Very Low Sediment intrusions Low Settlement and treatment prior to discharge Low Gladstone wetland Moderate Sediment intrusions Minimal hydrological variation Negligible Low Settlement and treatment prior to discharge Negligible Low Overall Moderate Various Negligible to High Northern Rock Stack TB1 Moderate Diversion of 1,391 m length of stream l Low Fish and kōura salvage and relocation Very low
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