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Revised June 13, 1984 <br />Topsoil Replacement Cost <br />Existing Pit Area: Average haul distance <br />volume <br />= 2,000 ft. <br />= 17,600 cy* <br />+ 51,200 cy* <br />+ 29,500 cv* <br />98,300 cy <br />* From Table 71 <br />657B scraper can produce 408 cy/hr. at 2,000' haul (808 efficiency, <br />68 RR, 08 grade) <br />Actual production = <br />ideal x altitude adjustment = 408 x .905 = 369 cy. hr <br />To move 98,300 cy it will take 266 hours <br />657 cost/hr = 5178.54; $178.54 x 266 hours = 547,500 <br />•~ <br />Pit 1 Area: <br />average haul distance = 1,000 ft. <br />volume - [9.9 ac x 43560 ft3/ac ft x 0.5 ft] <br />c 27 BCY/ft3 = 7986 CY <br />657B scraper can produce 536 cy/hr at 1,000' haul (808 efficiency, <br />6B RR, 08 grade) <br />Actual production = <br />ideal x altitude adjustment equals 536 x .905 = 485 cy/hr <br />To move 7,986cy it will take 16 hours. <br />657 cost/hr. = 5178.54; 5178.54 x 16 hours = S 2,900 <br />i~ <br />9 <br />