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C <br />2. Subsoil Placement Over Haekfilled Pit <br />Amount of material to haul - 38,720 BCY <br />Assume 25 percent swell - 48,400 LCY <br />Use 2 CAT 631-D scraper - <br />Estimated level haul - <br />Haul distance - <br />Use CAT D8-L for support <br />Total Cvcle Time <br />Loading time - <br />Travel time (full) - <br />Dump time - <br />Return time - <br />Number of passes per hour = <br />53 rolling resistance <br />1,500 feet one xay <br />.8 minutes <br />1.3 minutes <br />.7 minutes <br />1.0 minutes <br />3.8 minutes <br />60 minutes/hour <br />3.8 minutes/pass - <br />15'78 - 15 passes per scheduled hour = <br />425 BCY/operated hour (see page 283, CAT Handbook Edition 16) <br />C <br />Mechanical availability = .90 <br />Operational availability = .85 <br />Total subsoil production/scraper = 363 BCY/scheduled hour <br />Number of hours = 38,720 BCY , 0 scheduled hours <br />363 BCY/sch hr <br />= 92 operated hours L 2 <br />Oaeratine Costs <br />CAT 631-D scraper = op hr x 92 operated hours = $13,733 <br /> <br />CAT D8-L Dozer = 84'22 x 46 operated hours = $3,874 <br />op hr <br />Labor Costs <br />Scraper operator = 107 scheduled hours x 11'50 = $1,231 <br />sch hr <br />Dozer operator = 54 scheduled hours x '25 = $500 <br />sch hr <br />Total subsoil placement costs = $19,338 <br />y <br />/?/8~~ <br />