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-10- <br /> Mine No. 4 <br /> The Mine No. 4 pad area is 2.86 acres in size and must be backfilled to an average <br /> depth of 20.25 feet. A D9U would have an average push distance of 400 feet and <br /> would be required to move 93,436 yd3 of material. The unadjusted production rate <br /> for a 400-foot push distance is 425 LCY/hr. The following are the production <br /> factors that apply to this operation: <br /> Condition Factor <br /> Average Operator 0. 75 <br /> Rock Material 0. 70 <br /> 50 minute working hour 0.84 <br /> Grade Factor 290 0.42 <br /> Altitude deration 0.94 <br /> Overall Factor 0.17 <br /> Under these conditions, a D9U has a production rate of 72 LCY/hr. and would require <br /> 1,297 hours to complete at the following cost: <br /> 1 - D9U dozer: 1,297 hours @ $127.00/hr. _ $164,719.00 <br /> 1 - Operator: 1,297 hours @ $ 15.00/hr. _ $ 19,455.00 <br /> TOTAL COST: $184,174.00 <br />