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Wild Horse Expansion and Grassy Valley Mine Reclamation Costs MLE2 <br />329,019 $ 103,996 $ 51,156 $ 484,170 check MDE Revised (3- 10 -14) <br />Phase I Costs for Reclaiming Backfflled NE Mine Area <br />Footnotes for summary cost table: <br />'Assumes heavy grading will be done with conventional D10 dozers with U blades where the push distances are practical <br />'Assumes light grading will be done with a D9 dozer on the backfdled areas in Wtdhorse Extension area (rate = 2 hra/acre) <br />'Growth Medium Replacement fleet will consist of 988 loader, 4 -777 trucks, 14G grader, and 5000 gal water truck <br />°Growth Medium wit be spread using a D-9 dozer to a depth of 6 inches <br />'Sod analyses will be run on samples of the reclaimed areas to determine optimum fertilizer rates <br />'Ripping and fertilizing wall be conducted on the replaced growth medium using a conventional D4 dozer with a cyclone spreader <br />'Seeding and harrowing will 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 revegetatbn <br />'Mulching will be conducted using conventional hydro-seeder/hydro- mulcher <br />1'Trees and shrubs will be planted on north and east - facing slopes <br />"Supervisor costs are figured at 25 percent of the total work hour; to accomplish the reclamation effort <br />East Cresson Mine IWildhorse Mine Areal Backflll Dozer Productivity in Re-contouring <br />Assumptions: (1) Backfdl will be hauled and end - dumped in 20 foot liar during operations. Entire area will be leveled with dozen:, assuming an average depth of 5 feet. The volume of mass haulage vnll be by <br />trucker with a weighted haul distance. <br />What is the selected equipment to haul growth medium? <br />Quill mil <br />Comment <br />What s the Total Volume of backfilled rock to be graded? <br />539,660 <br />Reference Sheet 9 (Average of cut/fill amounts) <br />What s the average Haul Distance for all material? <br />1D0 <br />Feet per Sheet 9 <br />What s the volume t t were all just 5 ft. grading? <br />539,660 <br />Area x 5 n / 27 <br />What is the expected average push distance for leveling piles? <br />1D0 <br />Short Doze to level end-dumped truck loads <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, p1 -02 <br />What is the job correction factor for side by side dozing? <br />1.2 <br />Side by side dozing, Cat Hdbk, 33 Ed, p142 <br />What is the dozer unit and blade type selected? <br />D10 ill -Blade <br />66.9 acres <br />What is unadjusted production based on push distance? <br />1,772 <br />cu yds /hf from Regression Equation Developed from Cat Handbook Version 39 <br />Calculated adjusted production based on job factors = <br />1905.6 <br />cu yda/hr calculated <br />Calculated D10 Dozer hours in grading = <br />283.20 <br />hours <br />What is the selected equipment to haul growth medium? <br />623 Scrapers <br />Source Volume <br />Haul Dist Prod <br />Hours Q <br />How many scrapers voll be used? <br />3 <br />GM38 53,966 <br />2,352 178.954 <br />302 <br />What is the area for growth medium replacement? <br />66.9 acres <br />D <br />0 °v a <br />What is the thickness of growth medium replacement? <br />0.5 feet <br />0 <br />0 a <br />Calculated quantty of growth medium required = <br />53,955 cu yds <br />0 <br />0 <br />TefsWWaraife 53,966 <br />2,352 173JM <br />302 a` <br />How many acres will receive fertilizing and ripping simultaneously with a D4 dozer? <br />66.9 acres <br />How many acres will receive Seeding 8 harrowing simultaneousy with a D4 dozer? <br />66.9 acres <br />How many acres will receive tree planting? <br />- acres <br />'Measured from the 2010 Growth Medium Stockpile Map for each pile (Midway 1, Midway 2, or new E. Cresson) <br />21'rom the Scraper Production Graph <br />13 -WHEX Grassy Valley <br />3/21/2014 <br />