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EXHIBIT L BOND CALCULATION SCENARIO <br /> As reclamation will be concurrent with mining, the worst-case reclamation scenario will occur <br /> during the last phase of mining in Area 8, which is the largest phase. At this point, the previous <br /> phases should be reclaimed, while the facility area and 500 feet of highwall remain. <br /> Reclamation consists of regrading, topsoiling, and vegetating. A detailed breakdown of <br /> reclamation tasks can be seen below. <br /> The following reclamation tasks will be required. <br /> • Remove scale and office <br /> • Active highwall area backfilling =2H:1 V to 3H:1 V slope; area 2,600 ft2 (70 ft. tall <br /> highwall) multiplied by the 500 ft highwall length, at 27 CF/CY=45,370 CY at$1.50/CY <br /> = $68,055. <br /> • Topsoiling of the maximum disturbance, 19.5 acres, in Area 8. 19.5 acres at 12 inches <br /> deep at$1.50/CY = $47,190. <br /> • Irrigated pastureland revegetation of the additional 19.5-acre disturbed area. 19.5 acres <br /> at$1334/acre = $26,013. <br /> Table L-1 — Reclamation Cost Estimate <br /> into It <br /> Active highwall knockdown using a ! 0.5 45,370 CY 1.50 $68,055 <br /> dozer to create final 3H:IV slope.500 <br /> fL long highwall,70 ft.tall <br /> Revegetation of disturbed areas. i 0.5 19.5 ( Acres 1334.00 $26,013 <br /> Includes seeding and mulching. <br /> Assume 25%seed failure rate(13 <br /> acres X 1.25) E <br /> <b, <br /> DRMS Costs(28%x direct costs) $39,832 <br /> Total Bond Amount $1821090 1 <br /> Base Products Gravel Pit 2 L_f Lewicki&Associates <br /> April 2022 <br />