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<br />i <br />i <br />-3- <br />Productivity Estimates <br />Debris Removal (2,807 yd3 coal base) <br />Equipment: ti x 4 on/off highway dump truck <br />Uump Truck Loader <br />lU yd3 capacity <br />3U mile round trip 45 minutes <br />Load and dump = 8 minutes <br />Travel tune = 53 minutes <br />11.3 yd3/h r. <br />136 yd3/hr <br />Factors <br />5U min. hr. .84 <br />bucket factor .90 <br />mech. avail. .85 <br />Factors <br />5U min. hr. .84 <br />utilization .95 <br />mech. avail. .85 <br />11.3 x Factors = 7.66 yd3/hr. <br />utilization .95 <br />136 x Factors = 83 yd3/h r. <br />' 366 hrs. truck time 34 hrs. loader time <br />Use l loader and 11 trucks for 34 hours. <br />Backfillina and Gradi <br />Pad Area <br />Use U-8L crawler tractor with "U" blade and double shanked ripper. <br />875 LCY/hr. unadjusted <br />4.ee. /~-~jL. <br />Factors <br />.85 (lUY grade) <br />.75 (Avg. operator) <br />.84 (50 min. hr. efficiency <br />1.2U (slot dozing) ~ <br />25Y swell factor <br /> <br />875 <br />x .85 x .75 x .84 x 1.2U 1.25 <br />`~ <br />= 45U BCY/h r. adjusted production / <br />Time = 74,000 BCY i 45U BC'Y/hr. = 164 hours I <br /> <br />