Nevada Copper Corp NEVDQ

16.1.4

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16.1.4 Mine Hydrogeology The most recent data relating to the mine hydrogeology was prepared in 2012 technical report by Tetra Tech entitled “Technical Report - Underground Only Alternative for the Pumpkin Hollow Copper Project” with effective date of December 12, 2012. The mine inflow estimates, prepared by Tetra Tech at the time, were based upon available empirical data related to environmental aspects, seasonal effects and the thickness of the alluvial aquifer. The most significant concern for larger expected inflows will be for the Eastern Area Deposits, reaching up to 1,800 gpm. The inflow direction for the eastern portion of the Property is toward the north and the west, whereas other portions of the Property are towards the north. The inflow will be greater during shaft construction and will lessen as the mine life progresses. The largest drawdown expected is about 10 ft. Therefore, this was used by Tetra Tech for the estimates. It is not expected that the drawdown will exceed this, as the estimate is already conservative. The extent of the drawdown will also not exceed 0.3 miles distance surrounding the mine. Additional aquifer testing is required as well as the addition of empirical data moving into development. It is predicted that for the purpose of this study, passive collection will be required. Sumps will be placed strategically underground and water will be pumped out of the mine via the Main Shaft in the East zone and via the E2 ventilation raise in the E2 zone. 16.1.5 Resource Model The original resource block models suppli