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•?vision to Sec tin 2.05.4 <br />Remove Fill-Return To Cuts - 260,000 yd3 <br />637D cat (scraper) 2% grade D9 H (dozer) <br />_oadtime .6 minutes <br />.25 mi. empty .6 minutes <br />.25 mi. loaded .7 minutes <br />Dump .6 minutes <br />Spot Delay .2 minutes <br />2.7 minutes <br /> <br />Trips/50 min hr. = 18.5 <br />Cap/trip = 27.3 yd3 @ 90% efficiency: <br />18.5 x 27.3 x .9 = 455 yd3/hr <br />260,000 yd3 total mat. ~ 455 yd3/hr = 571/unit hours <br />Scrapers (3) = 571 3 = 190 hours x 185.21 x 3 = 105,570 <br />Dozer (1) = 190 hours x $139.36 = 26,478 <br />Operators (4) = 4 x 203 hours x $20/hr = 16,240 <br />TOTAL 148,288 <br />Rcolace Topsoil (RR) - 30,000 yd3 <br />Scraper production rate: <br />.7 mi. loaded = 1.6 min. <br />.7 mi. empty = 1.E min. <br />load = .9 min. <br />dump = .6 min. <br />spot = .2 min. <br /> 4.9 min <br />30,000 yd3 250 yd3/hr = <br />250 yd3/hr <br />Trips/50 min. hr <br />50 ~ 4.9 = 10.2 <br />eff. = 90% <br />cap = 27.3 yd3 <br />10.2 x .a x 27.3 = <br />250 yd3/hr <br />Scraper = 120 hours x 185.21/hr <br />Operator = 128 hours x $20/hr <br />TOTAL <br />120 unit hours required <br />= 22,225 <br />= 2,560 <br />$24,785 <br />Revised September, 1984 <br />