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Squaw Gulch Overburden Storage Area - Mass Earthwork, Growth Medium Haulage /Placement, and Revegetation <br />Footnotes for summary cost table: <br />'Assumes heavy grading will be done with conventional D10 or D11 dozers with U blades where the push distances are practical <br />'Assumes light grading will be done with a D9 dozer on the backfilled areas in Wikthorse Extension area (rate = 2 hm /acre) <br />Growth Medium Replacement fleet will consist of three 623 Scrapers <br />°Growth Medium will be spread using a D -9 dozer to a depth of 6 inches <br />'Soil 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 will be conducted on all replaced growth medium that is traversible with conventional equipment <br />OASSUmeS approximately half the area will require hand- seeding to achieve revegetation <br />'Mulching will be conducted using conventional hydfo-seeder /hydro-mulcher <br />`Trees and shrubs will be planted on north and east - facing slopes <br />"Supervisor costs are figured at 25 percent of the total work hours to accomplish the reclamation effort <br />Dozer Productivity Calculation for Heavy Grading <br />Quanthy. Comment <br />What is the Total Volume of beckfilled rock to be graded? 5,364,890 Reference Sheet 9 (Average of cutKill amounts) <br />What is the average Haul Distance for all material? 1033 Feet per Drawing Sheet 9 <br />What is the volume if It were all just 5 fl. grading ? <br />2,194,940 <br />Calculated Volume = Area x 5 ft 127 <br />What is the expected average push distance for leveling piles? <br />100 <br />Short Doze to level out end - dumped truck loads <br />What is the job correction factor for the operator? <br />0.75 <br />Average Operator, Cat Hdbk, 33 Ed, pl -42 <br />What is the job correction factor for the material condition? <br />1.2 <br />Waste rock is loose, Cal 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, pt -42 <br />What is the job correction factor for downhill grade pushing? <br />1.2 <br />Assume conservatively 10% grade, Cat Hdbk, 33 Ed, pl -42 <br />What is the job correction factor for side by side dozing? <br />1.2 <br />Side by-side-dozing, Cat Hdbk, 33 Ed, pl -42 <br />_ _ _ _ _ _ _ _ _ _ _ _ _ _ <br />Whet is unadjusted production based on push distance for a D10T <br />_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ <br />1,7s0 cu yde/hr from Regression Equation Developed from Cat Handbook Version 39 <br />(Calculated adjusted production based on job factors = <br />1893.4 <br />cu yds/hr calculated <br />Calwlaled D10 Dozer hours in grading = 1159.29 hours <br />— — — — — — — Ling <br />iWhat is unadjusted production based on push distance for a D117 <br />2,726 <br />cu yds/hr from Regression Equation Developed from Cat Handbook Version 39 i <br />,Calculated adjusted production based on job factors = <br />2934.1 <br />cu yds/hr calculated <br />) Calculeted D70_ D_oz_er hours In gratling = ________ _ _ _ _ _ _ _ <br />' <br />_ _748.08_ <br />_ hours _ _ _ _ _ ___ _________ _____________________ <br />- - J <br />Mass Haul Productivity for Fig Earthwork Exceedina 5 ff. Heavy Dozer Levelina of Piles <br />Additional Volume that will be truck hauled <br />3,169,950 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 />992 Change in Moment arm by removing 6 ft. push - (VYHDt- Vd•HDd)Nrem <br />What is loaded travel time based on haul distance 8 rolling resistance (min)? <br />0.8 <br />What is empty travel time based on haul distance 8 rolling resistance (min)? <br />0.4 <br />What is the manuever time for trucks at the loading area (min)? <br />0.70 <br />What is the length of time it takes a truck to dump (min)? <br />1.00 <br />What is the capactiy 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 />5.88 <br />Calculated number of truckloads per hour = <br />10.2 <br />What is the efficiency of the haulage effort expressed as minutes per hour? <br />55 <br />Calculated Productivity of Loader/rruck Combination (cu yds/hour) = <br />598.4 <br />Total Fleet Houns Required <br />6297.6 <br />17 -Squaw OSA <br />3/21/2014 <br />