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Revised June 13, 1984 <br />~' Actual Production = 506 x altitude adjustment (.905) <br />= 458 cy/hr. <br />NOTE: True production will be the same or higher <br />due to downhill grades from pile to pit. <br />Cost per cubic yard = $178.59/458 = 0.390/CY <br />Backfilling Cost - 8,120,700 x 0.390 = $3,167,100 <br />II, 479,300 cubic yards from existing overburden stockpile to Pit <br />No. 1 <br />Haul distance 6,000 feet <br />Haulage Equipment - Caterpillar 657 Push Pull Scrapers <br />Total Rental and Operating Cost = $178.54/hour <br />Production for 4400 foot haul @ 808 eff., 6~ of RR 0$ <br />grade = 248 BCY/hr <br />Production for 5200 foot haul (extent of chart) @ 808 <br />eff., 68 RR, 08 grade = 228 BCY/hr <br />~; Factor = 248 - 228 = _2.SBCY/hr 100 ft. inc. in haul <br />dist. <br />Actual Haul Distance = 6,000 feet <br />Production for 6,000 ft. haul distance @ 808 eff., 6$ RR, <br />OB, grade = 228 BCY/hr -(2.5 x (60 - 52)] = 208 BCY/hr <br />Correction for loose material in pile = 208 BCY/hr x 1.24 <br />swell = 258 CY/hr <br />Actual Production = 258 x altitued adj. (.905) = 233 <br />CY/hr <br />Cost per cubic yard = $178,54/233 = 50.766/CY <br />Backfilling Cost = 479,300 x $0.766 = $367,100 <br />Total Backfilling Cost = 53,534,200 <br />Smooth Grading Cost <br />16G motorgrader - grades 1 acres/hr at $70.03/hr <br />~; 158.50 acres divided by 1 acre/hr. x $70.03 = $ 11,100 <br />8 <br />