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• Backfilling = 8,400 yd3 @ $1.40/yd3 $11,760 <br />SPGM Salvage 1,800 yd3 @ $1.40/yd3 $ 2,520 <br />SPGM Replacement (includes topsoil) 2,700 yd3 @ $1.40 yd3 = $3,780 <br />Front-end Loader - Backfil <br />The front-end loader will be employed for supplemental transport of <br />backfill material which cannot be readily emplaced by the tractor or the scraper due <br />to length of haul or attitude of repository areas. Examples of its usage are <br />distribution of SPGM in confined areas where the scraper cannot spread requisite <br />thickness of material; deposit of SPGM where the scraper cannot turn around; and to <br />clean or fill corners which cannot be reached by the blade of the tractor. Due to <br />intermittent utilization and a large proportion of standby activity, front-end <br />loader coats are assumed to be a function of tractor time rather than volumetric <br />output of the unit itself. <br />• Tractor Time (backfilling) <br />Portal Bench = 35 hours (6,000 yd3), Access Road 13 hours (4,500 yd3) <br />48 x $52.46/hour = $2,523 $2,523 = $0.24/yd3 <br />10,500 <br />15-Ton Capacity Truck, Rear Dump <br />A truck will be required to haul backfill material from [he portal bench <br />to the truck scale area to backfill the scale pit. Only 100 cubic yards of fill are <br />required and due to the four mile haul, use of the scraper is impractical. A 15-ton <br />truck is readily available locally and ie of suitable size for road conditions <br />between the mine and scale area. Ten round tripe will be necessary, and from an <br />estimated load factor of 1 yd3 = 1.5 tone; four loaded miles per trip; and at a fee <br />of $0.15 per ton-mile, the trucking cost would be: <br />15 tons x 10 trips x $0.15 x 4 miles = $90.00 <br />trip ton-mile <br />\ 114iv (Rev. 1-13-82) <br />