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Sediment Demonstration — Mine Site - revised 1/22/2016 w/ 1/8/2016 addendum Page 7 <br />Section 3.03.1 <br />Demo #2 Adjacent, non -mined condition <br />A=RKLSCP <br />A = (24.7) (.32) (3.34) (.02136) (1.0) <br />A = .564 <br />Demo #2 Reclaimed RDA condition <br />A=RKLSCP <br />A = (24.7) (.32) (4.56) (.011) (1.0) <br />A = .396 <br />In this scenario, the reclaimed RDA condition produces less sediment than the non -mined, adjacent <br />condition. A summary of the results are shown on Table 4. <br />Table 4 <br />RDA Annual Sediment Yield <br />tons/acre/year <br />Adjacent, non -mined Condition .564 <br />Reclaimed RDA Condition .396 <br />Averaging all the values from the three sediment demonstrations conducted by EFCI is likely the <br />most accurate over the long term. Predictions from RUSLE represent soil loss averaged over many <br />storms and years. It also represents averages over a total field or disturbed area. [Barfield, B.J., Haan, <br />C.T., Hayes, J.C., 1994]. Table 5 below shows the results from averaging the three methodologies for <br />the sediment modeling efforts from Table 2, Table 3, and Table 4. <br />Table 5 <br />RDA and mine site <br />Annual Sediment Yield <br />tons/acre/year <br />Pre -mining average, three demonstrations <br />.522 <br />Post -mine average, three demonstrations <br />.405 <br />The post -mining average sediment yield is less that the pre -mining average sediment yield. <br />Therefore, the requirements of Rule 3.03.1(3)(b) have been met for the Southfield Mine. <br />4.0 REFERENCES <br />Barfield, B.J., Haan, C.T., Hayes, J.C., 1994, Design Hi,drologv and Sedimentologv for Small Catchments <br />