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Exhibit L. Reclamation Cost Estimate for Black Mountain Sand Lost Creek Mine Weld County, CO <br /> Item Unit Estimated Quantity Unit Cost Total Estimated Amount <br /> A) Earthwork and Grading <br /> Backfill and slope 3:1 max cy 7,447,232.00 $2.00 $14,894,464.00 <br /> B)Topsoil <br /> Redistribution of salvaged topsoil (2'Average Assumed) cy 6,657,944 $2.00 $13,315,888.00 <br /> C) Establish Vegetation <br /> Seed Bed Preparation acre 2050 $60.00 $ 123,000.00 <br /> Seed Mix 12 Ibs/acre drill seeding Ibs 24600 $30.00 $ 738,000.00 <br /> Drill Seeding acre 2050 $200.00 $ 410,000.00 <br /> Mulch-noxious weed free straw mulch 2 tons/acre ton 4100 $210.00 $ 861,000.00 <br /> Disk Anchor acre 2050 $58.00 $ 118,900.00 <br /> D) Erosion Control <br /> Slope Interception - Bioroll LF 37000 $2.50 $ 92,500.00 <br /> Total (A+B+C+D) $30,553,752.00 <br /> Administrative (5%) $1,527,687.60 <br /> Total $32,081,439.60 <br />