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• <br />37,906 yd3 (659 yd3/hour) = 57.5 dozer hours <br />57.5 dozer hours ($135/hour) _ $7,763 <br />TOTAL MILL AREA GRADING COSTS <br />REMAINING RECLAMATION COST OBLIGATION <br />E.3.3 Topsoil Placement and Grading <br />Equipment: 627 scraper <br />D-8N dozer <br />Topsoil Placement: <br />Topsoil will be replaced using a 627 scraper <br />Production Rate: <br />Topsoil volume <br />43,566 fr'/acre (1.5 foot depth) (23.5- res)(1 yd3/27 ft3) = 56,870 yd3 <br />Fill to be placed using a Caterp' ~7 scraper at a cost of $140/hour <br />Average haul distances of 1,000 feet <br />Total resistance (grade and rolling) is 2% <br />Cycle time: Loaded 1.5 minutes Empty 1.25 minutes <br />Total cycle time = 3.75 minutes (grade adjusted) <br />_ m~ <br />i <br />~ $7,763 <br />Haulage volume 20 yd3/load <br />Unadj(tsted production rate <br />60 minutes hour / 3.75 minutes/load (20 yd3/load) = 320 yd3/load <br />Production rate adjustments for 0.83 job efficiency and 0.92 operating altitude <br />320 yd3/hour (0.83) (0.92) = 244 yd3/hour <br />Scraper time required = (56,870 yd3 / 244 yd3/hou~~,2~33 hours <br />Total estimated cost = 233 hours ($140/hour)- 32,620 p <br />Topsoil Grading: <br />Using topsoil grading calculations and costs frotn A.3, costs would be: L <br />(56,870 yd3 / 1,255 yd3/hour) = 45.5 hours = 45.5 hours ($135/hour) _ $6,14 J ~ ~~ <br />TOTAL MILL AREA TOPSOIL COSTS <br />REMAINING RECLAMATION COST OBLIGATION <br />E.4 ROM O/re Stockpile Earthwork <br />ROM Itrea 2? acres (/ <br />Outslope area - acres <br />Bench area = 17 acres <br />E.4.1 Ripping ROM Stockpile Area <br />r L <br />($38,763 ~.~ f <br />PRELIMINARY DRAFT <br />FOR DISCUSSION PURPOSES ONLY <br />