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Wild Horse Expansion and Grassy Valley Mine Reclamation Costs MLE2 <br />Footnotes for summary cost table: <br />'Assumes heavy grading will be done with conventional D10 or Dl ldozers with U blades where the push distances are practical <br />2Assumes light grading will be done with a D9 dozer on the backflled areas in W ildhome Extension area (rate = 2 hrs/acre) <br />'Growth Medium Replacement Beet will consist of three 623 Scrapers <br />'Growth Medium will be spread using a D-9 dozer to a depth of 6 inches <br />SSoil analyses will be run on samples of the reclaimed areas to determine optimum fertilizer rates <br />"Ripping and fertilizing will be conducted on the replaced growth medium using a conventional D4 dozer with a cyclone spreader <br />'Seeding and harrowing wil be conducted on all replaced growth medium that is traversible with conventional equipment <br />'Assumes approximately half the area will require hand-seeding to achieve revegetation <br />"Mulching will be conducted using conventional hydro-seeder/hydrotnulcher <br />1OTrees and shrubs will be planted on north and east -facing slopes <br />"Supervisor costs are (gored at 25 percent of the total work hours to accomplish the reclamation effort <br />Dozer Productivity <br />Calculation for Heavy <br />Gradina <br />e <br />O <br />Ouant <br />Comment <br />What is the Total Volume of backBlled rock to be 9--7 <br />1,454,420 <br />Reference Sheet 9 (Average of cut/fill amounts) <br />2,426 <br />What is the average Haul Distance for all material? <br />478 <br />Feet per Drawing Sheet 9 <br />What is the thickness of growth medium replacement? <br />What is the volume y it were all just 5R grading 7 <br />1,454,420 <br />Calculated Volume =Area x 5ft/27 <br />What is the expected average push distance for leveling pies? <br />100 <br />short Doze to level out end-dumped truck beds <br />What is the job correction factor for the operator? <br />0.75 <br />Average Operator, Cat Hdbk, 33 Ed, p142 <br />What is the job correction factor for the material condition? <br />1.2 <br />Waste rock is loose, Cat Hdbk, 33 Ed, p142 <br />What is the job correction factor for job efficiency? <br />0.83 <br />50 minutes operating per hour, Cat Hdbk, 33 Ed, p142 <br />What is the job correction factor for downhill grade pushing? <br />1.2 <br />Assume conservatively 10% grade, Cat Hdbk, 33 Ed, p142 <br />Whatisihe lob correction factorfor skle by !id tlozin8?- _- _______- _- _ -_ -_ <br />-_ 12 ___Sitle�sitla <br />tlozing, Cat Hdbk_33 Ed, f1- 42_ -_ -_ _ _ _ _ _ ___- _- _ -_ -__ <br />What is unadjusted production based on push distance for a DID? <br />1,760 <br />cu ydsr from Regression Equation Developed from Cat Handbook Version 39 i <br />(m <br />Calculated adjusted production based on job factors = <br />1893.4 <br />cu yds/hr calculated <br />)C_ lated910 DO efhours in grading = <br />768.17 <br />hours_ _ _ _ _ _ _ _ _ _ _ _ _ _ _- _- _ -_ -_ -_ <br />_ _ _ _ ___- _- _- _- _ -_ -__ <br />What is unadjusted production based on push distance for a Di 17 <br />-_- <br />2,728 <br />_ _ <br />cu ydslhr from Regression Equation Developed from Cat Handbook Version 39 <br />Calculated adjusted production based on job factors = <br />2934.1 <br />cu yds/nr calculated i <br />(Calculated910 __- _- _- _- _______________- <br />_495.70 ___hours <br />-_-_-_-_-_-__ _____________________- _- _____ -2 <br />Mass Haul Productivity for FIII Earthwork Exceedina 5 <br />ft. Heavy Dozer Leveling of Plies <br />Additional Volume that will be truck hauled <br />Fleet Hours Required <br />0 Difference between Total Volume and the Volume for leveling 5 ft piles <br />What is the weighted average Haul Distance for the truck haul? <br />0.0 <br />0 <br />What is loaded travel time based on haul distance & rolling resistance (min)? <br />307.2 <br />0.0 <br />What is empty travel tithe based on haul distance & rolling resistance (min)? <br />318.0 <br />0.0 <br />What is the manuever time for trucks at the loading area (min)? <br />362.9 <br />0.70 <br />What is the length of time it takes a truck to dump (min)? <br />1.00 <br />What is the capactly of the selected truck (avg cu yds)? <br />64 <br />Calculated time for loading a truck (min) = <br />3.00 <br />Total Cycle Time (Maneuver + Load + Loaded Haul + Empty Haul + Dump) = <br />4.70 <br />Calculated number of truckloads per hour = <br />12.8 <br />What is the efficiency of the haulage effort expressed as minutes per hour? <br />55 <br />Calculated Productivity of Loaderlrmck Combination (cu yds /hour) = <br />748.9 <br />Total Fleet Hours Required <br />0.0 <br />What is the selected equipment to haul growth medium? <br />How many scrapers will be used? <br />Somber Productivity <br />623 Scrapers <br />3 <br />Source Volume Haul Dist Prod Hours <br />e <br />O <br />GM38 96,438 3,708 126.334 763 <br />What is the area for growth medium replacement? <br />66.9 acres <br />GM4 <br />26,579 <br />2,426 <br />17418 <br />152 <br />°a <br />What is the thickness of growth medium replacement? <br />0.5 feet <br />3,708 <br />2,426 <br />0 <br />0 <br />0 <br />m <br />Calculated quantity of growth medium required = <br />53,955 cu yds <br />2.0 <br />0.0 <br />0.0 <br />0 <br />0 <br />B <br />1.3 <br />0.9 <br />0.0 <br />0.0 <br />0.0 <br />0 <br />0 <br />a` <br />TotallAver2ge <br />123,017 <br />3,431 <br />134.065 <br />915 <br />Truckloads per hour <br />6.6 <br />13 -WHEX Grassy Valley <br />3/21/2014 <br />777F Haul Truck Productivity <br />Source 1 <br />Source 2 <br />Source 3 <br />Source 4 <br />Source 5 <br />Total Fleet Hours <br />Haul Distance <br />3,708 <br />2,426 <br />0 <br />0 <br />0 <br />Loaded Travel Time <br />3.1 <br />2.0 <br />0.0 <br />0.0 <br />0.0 <br />Regression at 1307.7 feet per min .6% grade <br />Empty Travel Time <br />1.3 <br />0.9 <br />0.0 <br />0.0 <br />0.0 <br />Regression at 2,724 feet per min -6 %grade <br />Total Cycle Time <br />9.1 <br />7.6 <br />4.7 <br />4.7 <br />4.7 <br />Truckloads per hour <br />6.6 <br />7.9 <br />12.8 <br />12.6 <br />12.8 <br />Productivity <br />386.0 <br />463.7 <br />748.9 <br />746.9 <br />748.9 <br />40D.5 <br />Fleet Hours Required <br />249.9 <br />57.3 <br />0.0 <br />0.0 <br />0.0 <br />307.2 <br />Productivity by Regression Equation <br />294.3 <br />318.0 <br />362.9 <br />362.9 <br />362.9 <br />13 -WHEX Grassy Valley <br />3/21/2014 <br />