Supporting Technical Assessments

www.valenza-engineering.com 381_R_04_Rev 0 OGNZL_WUG_Phase1_Conceptual_Mitigation 12 • Potential for effects on the surface ecological system. Tunnel inflow measurement will be required to demonstrate the potential effects on surface waters or other groundwater users are consistent with the predictions made from modelling and assessment, and to demonstrate the effectiveness of the underground mitigation measures. GWS summarise that a minimal risk of effects exists to shallow groundwater, surface water, groundwater users and plant growth. 3.3.2. POTENTIAL MINE DEVELOPMENT EFFECTS Five vent shafts are proposed as part of the WUG project. The first of these lies within the Willows Farmland and outside of the CFP. Dewatering of the vent shafts during their construction is necessary and the reduction of any impacts from this activity is required through engineered mitigation. Further assessment suggests the potentially more significant interaction between the groundwater and surface water systems from the mine development associated with the high permeability sections of the EGV within the mine stopes.

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