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Surface Blasting Work Cont'd Task# 020 Page 3 of 3 <br />DRILLING AND EXPLOSIVES PREPARATION TIME <br />Total Drilling Length: 6,980 linear feet <br />Unadjusted Drilling Rate: 82.00 feet/hour <br />Drilling Time: 133.72 hours <br />Job Condition Corrections: <br />Site Altitude: <br />7,100 <br />feet <br />Altitude Adjustment: <br />0.95 <br />(DRMS est.) <br />Job Efficiency Factor: <br />0 <br />(CH. Exc. HB) <br />Adjusted Drilling Rate: <br />52.19 <br />feet/hour <br />Explosives Prep. Time: <br />100.00 <br />hours <br />JOB TIME AND COST <br />Total Job Time: 233.73 Hours <br />Unit cost: $2.722 per cu. yd. Total Job Cost: $134,326.11 <br />CIRCES Cost Estimating Software <br />