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~ J <br />Mine Area Seneca II - Yadae Pit <br />Project Hiahwall Reduction <br />Task Dri Ll 8 Shoo[ Hiahwall <br />WORKSHEET N0. NA-4 <br />OTHER RECLAMATION ACTIVITY COSTS <br /> <br />Total No. Holes = 2 1y 50' = 108 Holes x 3 Rows = 324 Holes <br />20 <br />Total Feet of Drilling Required <br />30 ft/3 holes x 108 = 3,240 ft. <br />Total Amount of Exol osives <br />255.30 lbs/3 holes x 108 = 27,572 <br />Avg. Drilling Rate = 2 ft/min <br />Time = 3.240 = 27 hrs <br />2 ft/min x 60 min/hr <br />Cos[ Estimate Calculations: <br />Drilling Cost = (27 hr x 230.37/hr) <br />= 56,220 <br />1 bit a E1500/bit = f1,500 <br />Explosives: f0. 15/lb x 27,572 lb = E4,136 <br />TOTAL = E11.856 <br />7 } 20 ah.t~~ <br />w33.aa ~-~'` <br />Uq ~ ~ .1313 <br />• <br />