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East Cresson - Wild Horse Mine Reclamation Costs MLE2 Footnotes for summary cost table: 'Assumes heavy grading will be done with conventional Dl or DI 1dozers with U blades where the push distances are practical 2Assumes light grading will be done with a D9 dozer on the backfilled areas in Wildhorse Extension area (rate = 2 hm /acre) 3Growth Medium Replacement fleet will consist of three 623 Scrapers 4Growth Medium will be spread using a D-9 dozer to a depth of 6 inches sSoil analyses will be run on samples of the reclaimed areas to determine optimum fertilizer rates 'Ripping and fertilizing will be conducted on the replaced growth medium using a conventional D4 dozer with a cyclone spreader 'Seeding and harrowing will be conducted on all replaced growth medium that Is traversible with conventional equipment 9Mulching will be conducted using conventional hydro-seeder/hydro- mulcher 1OTrees and shrubs will be planted on north and east - facing slopes "Supervisor costs are figured at 25 percent of the total work hours to accomplish the reclamation effort Dozer Productivity Calculation for Heavy Gradina is the Total Volume of backfilled rock to be graded? 2,663,740 Reference Sheet 9 (Average of cu0fill amounts) What is the weighted average Haul Distance for the truck haul? (What What is the average Haul Distance for all material? 785 Feet per Drawing Sheet 9 What is loaded travel time based on haul distance & rolling resistance (min)? What is the volume If it were all just 5 ft. grading 7 1,397,147 Calculated Volume a Area x 5 ft 127 What is the expected average push distance for leveling piles? 100 Short Doze to level out end-dumped truck loads What is the job correction factor for the operator? 0.75 Average Operator, Cat Hdbk, 33 Ed, pl42 What is the job correction factor for the material condition? 12 Waste rock is loose, Cat Hdbk, 33 Ed, p142 What is the job correction factor for job efficiency? 0.83 50 rninutes operating per hour, Cat Hdbk, 33 Ed, p142 What is the job correction factor for downhill grade pushing? 1.2 Assume conservatively 10% grade, Cat Hdbk, 33 Ed, p142 What is the job correction factor for side by side dozing? 1,2 Cat Hdbk, 33 Ed, pl42 bysida dozing------------------------------------------ _ ___- What is unadjusted production based on push distance for a D10? _- _ -_ -__ 1,760 _Side cu ydsMr from Regression Equation Developed from Cat Handbook Version 39 Calculated adjusted production based on job factors = 1893.4 cu yds/hr calculated i Calculated Dl 0 Dozer hours in grading = 737.92 4.7 _ _ _____________737.92____hours_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ __________ rWhat is unadjusted production based on push distance for a D11? 2,728 cu ydsthr from Regression Equation Developed from Cat Handbook Version 39 Calculated adjusted production based on job factors = 2934.1 cu yds/hr calculated '`alculeted DlO Dozer hours in grading__ -_ _ _ _ _ _ _ _ _ _476.16_ _ hours_ _ _ _ _ _ _- _ -_ -_ -_ _ ___- _- _- _- _- _____ -_ -� Mass Haul Productivity for Fill Earthwork Exceeding 5 ft. Heaw Dozer Leveling of Piles Additional Volume that will be truck hauled 1,266,593 Difference between Total Volume and the Volume for leveling 5 ft piles What is the weighted average Haul Distance for the truck haul? 733 Total Fleet What is loaded travel time based on haul distance & rolling resistance (min)? 0.6 Source 2 Source 3 What is empty travel time based on haul distance & rolling resistance (min)? 0.3 Hours Distance What is the manuever time for trucks at the loading area (min)? 0.70 What is the length of time it takes a truck to dump (min)? 1.00 led Travel Time 4.3 What is the capacty of the selected truck (avg cu yds)? 64 0.0 0.0 Calculated time for loading a truck (min) = 3.00 2.1 0.0 Total Cycle Time (Maneuver + Load + Loaded Haul + Empty Haul + Dump) = 5.57 0.0 egression at 2,724 feet per min -6% grade Calculated number of truckloads per hour = 10.8 4.7 4.7 What is the efficiency of the haulage effort expressed as minutes per hour? 55 :loads per hour Calculated Productivity of Loader/Truck Combination (cu yds/hour) = 631.6 12.8 12.8 Total Fleet Hours Required 2005.4 Ictivity 316.6 748.9 Scraper Productivity 746.9 748.9 What is the selected equipment to haul growth medium? 623 Scrapers Source Volume Haul Dist Prod Hours ^g How many scrapers will be used? 3 GM4 139,715 5,670 91.3092 1530 What is the area for growth medium replacement? 173.2 acres 0 0 0 0 What is the thickness of growth medium replacement? 0.5 feet 0 0 ag` Calculated quantity of growth medium required = 139,686 cu yds 0 0 0 0 TotaVAverage 139,715 5,670 91.3092 1,530 12 -East Cresson -Wild Horse 3/21/2014 Total Fleet Source 1 Source 2 Source 3 Source 4 Source 5 Hours Distance 5,670 0 led Travel Time 4.3 0.0 0.0 0.0 0.0 egression at 1307.7 feet per min - 6% grade ty Travel Time 2.1 0.0 0.0 0.0 0.0 egression at 2,724 feet per min -6% grade Cycle Time 11.1 4.7 4.7 4.7 4.7 :loads per hour 5.4 12.8 12.8 12.8 12.8 Ictivity 316.6 748.9 748.9 746.9 748.9 316.6 Hours Required 441.2 0.0 0.0 0.0 0.0 441.2 activity by Regression Equation 258.0 362.9 362.9 362.9 362.9 12 -East Cresson -Wild Horse 3/21/2014