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Exhibit 19 <br />Golden Eagle Mine <br />Supplemental <br />Bond Calculations <br />1, Culvert Removal: <br />90' (42" cmp) x $8.23/LF _ $ 197 <br />30' (36" cmp) x $6.58/LF _ 740 <br />150' (24" cmp) x $4.93/LF - <br />Total S1r678 <br />2, Sealing Ground Water Monitoring Wells: <br />Wells PAW-1 through PAW-7 included in the New Elk Mine Bond <br />Estimate. <br />3, Non-coal Waste Removal: 3 <br />th of trash x 1 yd /27 <br />250' x 250' waste area x 3' avg. dep <br />ft3 x 54.86fyd - 633,'748 <br />'1 <br />`i Y <br />• <br />