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EXHIBIT L BOND CALCULATION <br /> The worst case reclamation scenario at the Yevoli Cobblestone Pit will be when roughly 15 acres of <br /> disturbance area present onsite and when 500-ft of highwall need reclaiming. Mining operations will <br /> move through the site, staying in the active area.A truck scale and office trailer will be located near <br /> the entrance and will need to be removed. A detailed breakdown of reclamation tasks can be seen <br /> below. <br /> 1 . Reclamation Tasks and Costs <br /> • Remove truck scale and office trailer= $6,000 <br /> • Active highwall area knockdown (dozer work) = 500 ft of OH:1 V to 21-1:1 V slope (cross <br /> section area of 156.25 sq. ft)at 27 CF/CY= 2900 CY at$0.50/CY= $1450. <br /> • Active highwall area backfilling (loader work) = 500 ft of 2H:1 V to 3H:1 V slope (cross section <br /> area of 312.5 sq. ft.) at 27 CF/CY= 5800 CY at$1.50/CY= $8700. <br /> • Topsoiling of 15 acres of disturbance (loader work). 15 acres at 12 inches deep (24,200 CY) <br /> at$1.50/CY= $36,300. <br /> • Rangeland seeding and mulching of disturbed area. 15 acres at$850/acre = $12,750. <br /> Table L-1 Phase 2 Reclamation Task and Cost Estimate <br /> Activity Description Time(Months) Cost($) <br /> Remove truck scale and office trailer 0.5 6,000 <br /> Active highwall knockdown 2 1450 <br /> Active hi hwall backfilling 2 8700 <br /> Topsoilings of all disturbed areas 2 36,300 <br /> Revegetation of disturbed areas. Includes seeding and mulching. 3 12,750 <br /> Subtotal 7.5 $65,200 <br /> DRMS C sts(28%x direct costs) $18,256 <br /> Total Bond Amount $83,456 <br /> Yevoli Cobblestone <br /> February 2023 Lewicki& Associates <br />