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EXHIBIT L WORST CASE RECLAMATION SCENARIO <br /> The worst-case reclamation scenario for the BRS&G Pit 1 is at the end of mining of Area 10, <br /> when the largest amount of dewatering would be necessary. The steps of reclamation at this point <br /> are outline below: <br /> Area 10 Reclamation <br /> • East Pit dewatering= 1900 ac-ft at$60/ac-ft= $114,000. <br /> • Area 10 final highwall backfilling <br /> o Vertical to 2H:1 V via slope knockdown over 2000 feet of highwall = 841 sq. ft. x <br /> 2000 ft= 62,296 CY. At a dozer push cost of$0.50/CY = $31,148. <br /> o Backfill 2H:1 V to final reclaimed slope (3H:1 V down to 10 feet below water line <br /> and then 2H:1 V to the pit floor)= 336 sq. ft. x 2000 ft=24,889 CY. Backfilling <br /> via front-end loader at a cost of$1.50/CY = $37,334. <br /> • Topsoiling of all disturbed areas above waterline (excluding roads) = 12.1 ac by 13 <br /> inches deep via front-end loader at$1.50/CY =$31,722 <br /> • Dryland revegetation= 12.1 ac at$800/ac = $9,680 <br /> • Facility removal (office trailer, truck scale, etc.)_ $5,000 <br /> Given the length of the mine life (roughly 50 years), it will take significant time to create the <br /> lakes. Assuming that the lakes are created at roughly the same rate over time, if the me is phased <br /> over 1 o years of the 50 year mine life, it would require accounting for one-fifth of the lake <br /> dewatering cost, one-fifth of the topsoil and revegetation cost, and the whole facility removal and <br /> whole backfill and grading cost. See Table L-1 for the determination of this phased bond. <br /> Since the bond is phased, the operator cannot have a total lake area greater 29 acres (one-fifth the <br /> total)during the first ten years of mining. Additionally, associated dryland disturbance is capped <br /> at 2.4 acres. <br /> BRS&G Pit 1 C: g I—A,a 1 rl I/ <br /> Alarch 2019 L-1 <br />