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<br />6. FACILITY/ROAD/STOCKPILE AREA GRADING <br />Site Specific Details <br />• Areas will be ripped on 3 foot centers to a depth of three feet using a D-9-L dozer with a <br />ripper shank. <br />• Ripped areas will be graded using a D-9-L dozer with a U-blade, to reestablish correct <br />drainage patterns. <br />• Volume of material to ripped/acre = 9,840 yds3. <br />ni <br />a. Production Rate <br />Ripping <br />Rate of Passes =Pass Length/Pass Speed+ Turn Around Time <br />_ [(209 feet + 60 feet min) + 0.25 min.] <br />= 3.7 min./pass or 13.5 passes/hr. <br />Area/Pass =Pass Length x Pass \'Jidth <br />=209ftx3ft <br />= 70 passes/acre. <br />Time/Area =Pass Area + Pass Speed <br />= 70 passes/acre + 13.5 passes/hr <br />= 5.18 hr/acre. <br />Grading <br />Time/Area = 1.0 acres hour. <br />Actual Production Rate =Ripping Rate + Grading Rate <br />= 5.18 hours/acre + 1.0 hours/acre <br />= 6.18 hours/acre. <br />b. Hourly Labor/Equipment Costs <br />Costs for a D-9-L with a ripper shank or a U blade <br />Labor Equipment <br />wave rental _ooeratianal Total <br />$17.95 $102.96 $43.79 $164.70 <br />c. Unit Cost to Grade Facility/Roads <br />_ (Labor Rate + Equipment Rate) x Production Rate <br />= 6.18 hours/acre x $164.70/hr <br />_ $1,017.91/acre <br />December 12, 1991 <br />10 <br />