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Reclamation Costs <br />Exhibit L <br />The worst -case bond scenario will occur at the end of mine life. The largest lake will exist that requires <br />dewatering to complete backfilling and grading. No more than 5.0 acres of wetland shelf require <br />backfilling at a time. The bond scenario costs are calculated using the general costs for each task in <br />the recent 2021 bond update conducted by CDRMS. <br />A breakdown of all costs associated can be seen in the table below: <br />Activity Description <br />Time <br />Quantities <br />'DwAo tent , cif j* at the ofwe <br />(Months) <br />1 <br />77S <br />Cost <br />Ac-t t $;69,513 <br />""d ,Mk* <br />1.5 ate of wed " ,.,,.,,,,,; <br />Backfill and grading of wetland shelf. <br />3 <br />120,500 <br />CY <br />1.20 $144,600 <br />Assume 5.0 acres of shelf requiring 24,100 <br />CY per acre. <br />T�,W1 amp (3' acres at 12 <br />6' <br />, ,., 03, <br />CY <br />1.t� <br />�59,6 <br />Rip all topsoiled areas (37 acres to 24 <br />2 <br />37 <br />acres <br />375 $13,875 <br />inches) <br />Seedling "%%:: <br />'", " % ; 1 <br />11 <br />Bares <br />13 <br />? <br />, <br />Rime iure Otte,Ir <br />Seeding wetland areas (19 acres); Assume <br />1 <br />19 <br />acres <br />2250 j $42,750 <br />30% seed failure rate. <br />Subtotal <br />12 <br />$389,911 <br />132t� <br />Total Bond Amount <br />$499,086 <br />White River City <br />July 2022 L-1 Lewicki 81 Associates <br />