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<br />• Labor Equipment <br />waee rental operational Total <br />D-9-L $17.95 $89.43 $39.07 $147.02 <br />c . Unit Cost to Grade Final Pit Areas <br />Unit Cost = (Labor Rate + Equipment Rate} x Production Rate <br />_ $147.02/hr x 0.75 feet/hr <br />_ $11026/foot of pit length. <br />Coct by Year <br />by Year: R lama .ion R n ny rid x Unit Cost = Yearl, <br />1 8,500 feet $110.2s/foot $937,210 ~ 4~1 ~ ~ 1 <br />2 3,900 feet "" $430,014 <br />3 3,525 feet "" $388,667 <br />4 3,550 feet °" $391,423 <br />5 3,750 feet °" $413,475 <br />2. ROUGH GRADING <br />it ne ifi D ails <br />• Rough grading will, at all times, be a maximum of 400 feet from the active <br />highwall. As final pit regrading extends out 300 of this 400 feet, rough grading will <br />always be required in the remaining 100 feet for the length of the highwall. <br />• Rough grading requires an average 100 foot push by a D-9-L dozer with a U blade. <br />• Volume iVloved/Area= 8,067 yd3 of materiaUacre. <br />a. Production Rate <br />Ideal production is 1,450 yds3/hr <br />Production Factor <br />operator ........... .75 <br />material ...........80 <br />job et1"iciency .......83 <br />altitude ........... ,$,$ <br />total ............ 0.458 <br />Adjusted Production <br />= Ideal Production x Production Factor <br />= 1,450 yds3/hr x 0.458 <br />= 664 yds3/hr. <br />December 12, 1991 <br />5 <br />