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• <br />SENECA COAL COMPANY <br />2000 RNOI -YOAST MINE <br />DRILL AND SHOOT HIGHWALL <br />SUMMARY SHEET Description of Reclamation Acitivity: Blasting to Reduce Highwall <br />Pit Highwall Length 5,600 ft Assumptions: Sources: <br />Pit Highwall Width 175 ft <br />Hole Spacing 27 ft Powder Factor = 0.63 Ib/yd Seneca Costs for 1998 <br />No. of Rows 207 Hole Diameter = 10 - 5/8 inches Furnished by Applicant <br />No. of Holes/Row 6 Drill = Drilltech D60K Contractors Equip. Cost Guide <br />Total No. Holes 1244 Drilling Rate = 2 fUmin Rate & CDMG Tables <br /> Bit Life = 8000 ft Furnished by Applicant <br /> Bit Cost = $1,500 /bit Furnished by Applicant <br /> Explosives = $0.20 /Ib Seneca Costs For 1998 (Includes <br />Drill length/row 102 ft primers and cord) <br />Total Length Drilled 21156 ft Drill Costs = $488.15 /hr Contractors Equip. Cost Guide <br />~ Avg. Drilling Rate 2 fUmin <br />I Total Drill Time 176 hr <br />i <br />N <br />Pounds of Explosives/row 915 Ibs <br />Total Amount of Explosives 189,778 Ibs <br />Drill Rig Costs/hr $488.15 <br />Drilling Costs $86,059 <br />Drill Bit Costs $3,967 <br />Explosive Costs/Ib $0.20 <br />Totol Explosive Costs $37,956 <br />TOTAL $127,981 <br />A <br />w <br />N <br />A <br />a <br />0 <br />0 <br />