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• POST-MINING INFLOW INTO MINE WORKINGS <br />Following cessation of mining operations, the underground mine workings <br />will be allowed to flood. Based on an estimated post-mining inflow rate <br />of 750 gpm and an estimated mine workings volume of 19,300 ac/ft, it is <br />estimated to take about 16 years to refill the mine workings. Details <br />of the mine inflow calculations are presented in Section 2.05.6, <br />Mitigation of the Impacts of Mining Operations. <br />C~ <br /> <br />-7- <br />