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3.2 MITIGATIDR RE4UIREMENTS <br />Mitigation water will be needed to augment eater rights <br />that might be impacted by mining. During the mining <br />operation, eater xill directly enter the pit from precip- <br />itation and seepage from the overburden aquifer, which is <br />primarily replenished by irrigation eater that percolates <br />into the aquifer. water levels in the vicinity.of the pit <br />will be lovered by pumping of the water from the pit. Annual <br />inflow into the NIICIA EAST pit from the overburden aquifer <br />has been estimated to be 43.B 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 eater table <br />is estimated to occur at 0.7 miles from the center of the <br />NUCLA EAST pit, and greater drawdovn xill occur at shorter <br />• distances. The following should be noted: <br />a. The quantity oP pit inflow and the areal extent <br />of the drawdown represent the Yifth year of <br />operation. Mining in the earlier years will have a <br />smaller imgact on the eater levels, and lnflov 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 />GE071UW5. INC. <br />• REVISED MARCH 2006 Attachment 2.05.3(3}16-61 <br />