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3 .2 MITIGATION REQUIREMENTS <br /> Mitigation water will be needed to augment water rights <br /> that might be impacted by mining. During the mining <br /> operation, water will directly enter the pit from precip- <br /> itation and seepage from the overburden aquifer, which is <br /> primarily replenished by irrigation water that percolates <br /> into the aquifer. Water levels in the vicinity of the pit <br /> will be lowered by pumping of the water from the pit. Annual <br /> inflow into the NUCLA EAST pit from the overburden aquifer <br /> has been estimated to be 43 . 8 acre-feet (Reference 3) during <br /> the fifth year of mining. At the end of five years, <br /> drawdown of one foot in the overburden-aquifer water table <br /> is estimated to occur at 0.7 miles from the center of the <br /> NUCLA EAST pit, and greater drawdown will occur at shorter <br /> distances. The following should be noted: <br /> a. The quantity of pit inflow and the areal extent <br /> of the drawdown represent the fifth year of <br /> operation. Mining in the earlier years will have a <br /> smaller impact on the water levels, and inflow rates <br /> will be lower. <br /> b. Calculations used to estimate pit inflow do not <br /> include the contributions resulting from irrigation <br /> water percolating into the overburden aquifer in the <br /> 16 <br /> GEOTRANS, INC. <br />