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Hitch Rack Ranch Phase III Surety Calculation Details <br /> Project: Hitch Rack Ranch <br /> Date: 07/05/16 <br /> Prepared by: Norwest Corporation <br /> WORKSHEET 9 <br /> PRODUCTIVITY AND HOURS REQUIRED FOR TRUCK USE <br /> Earthmoving Activity: <br /> Stockpiles <br /> Approximately 99,554 Icy of material calculated for Phase III pit layout. <br /> Total volume calculated using Carlson software. <br /> Characterization of Truck Use(type, size, etc.): <br /> Cat 777 Trucks <br /> Description of Truck Use(origin, destination, grade, haul distance, capacity, etc.): <br /> Productivity Calculations: <br /> No. Loader Passes/Truck= 78 LCY — 16 LCY = 4.0 passes <br /> truck loader bucket (round down to nearest whole <br /> capacity" net capacity number) <br /> Net Truck Capacity= 16 LCY x 4.0 passes = 64 LCY <br /> loader bucket no. loader <br /> net capacity passes/truck <br /> Loading Time/Truck= 0.60 min x 4.0 passes = 2.4 min <br /> loader cycle time(from no. loader <br /> Worksheet 8 or 10) passes/truck <br /> Truck Cycle Time = 2 in + 1.6 min + 2.8 min + 2.0 min <br /> haul time return time loading dump and <br /> time maneuver time <br /> 8.4 min <br /> No. Trucks Required= 8.4 min — 2.8 min = 0 trucks <br /> truck cycle time total loading <br /> time <br /> Production Rate= 64.0 Cl x 0 — 8.4 min = 22.9 LCY/min <br /> net truck no. trucks truck cycle <br /> capacity time <br /> Hourly Production = 22.9 LCY/min x ® min/hr x 0.79 <br /> production rate efficiency <br /> factor <br /> 1Q83.5 LCY/hr <br /> Hours Required 199,554 LCY — 11084 LCY/hr = 2 hr <br /> volume to be hourly <br /> moved production <br /> *Use the average of the struck and heaped capacities. <br /> Data Source(s): CAT Handbook Edition 43 <br /> Printed 9/26/2016 APPENDIX L-1 14 <br />