2005-10-24_REVISION - M1987028 - Laserfiche WebLink

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Topsoil Recovery-Lower Staging Area and North End Hangingwall An estimated 15000 tons of topsoil may be salvaged and stockpiled at the lower staging area (5000 tons) and along the eastern edge of the affected boundary as mining operations progress to the north over time. Efficiencies will be higher due to shorter haul distances and lower grades. Bulldozer (250 HP), projected efficiency 3501/hr, O&O $ 140/hr 15000 tons/350 t/hr = 43 hrs @ $140 = $6020 Loader (5 yd) projected efficiency 300 t/hr, O&O $100/hr 15000 tons/300t/hr = 50 hrs @ $100/hr $5000 Trucks (15 yd end dump) projected efficiency 200 tons/ hr O&O $85/hr 15000 tons/200 t/hr = 75 hrs @ $85 = $6375 Interim re-vegetation costs, 6 acres stockpiles @ $850/acre projected cost of Seeding and mulching 6 @ $850 $5100 Topsoil Application & Grading, Lower Waste Rock Dump and Hangingwall Topsoil application on lower waste rock dump will be performed by Front End Loader placement at the top of the dump followed by Bulldozer pushing to final location on the dump outslope. Front End Loader (5 yd), projected efficiency 350 t/hr, O&O $100/hr SOOOtons/350t/hr= 15 hrs @ $100/hr= $1500 Bulldozer(250 I-IP), projected efficiency 350 t/hr, O&O $140 5000 tons/350 t/hr = 15 hrs @ $140/hr = $2100 Topsoil disking, chiseling, or contour furrowing, Tractor O&O $ 80/1u 5000 tons will cover app. 8.4 acres @ 1 ac/hr eff. $672 Topsoil stored in stockpiles located along the eastern toe of waste rockpiles Constructed along the eastern edge of the affected land boundaries will need To be hauled to the top of the rockpiles for grading onto the final slopes of the Waste rockpiles. Front End Loader (5 yd), projected efficiency 350 t/hr, O&O $100/hr 10000 tons/ 350 tons/hr = 29 hrs @ $100 $2900 Trucks, (15 yd end dump), projected efficiency 150 tons/hr O&O $85 10000 tons/ 150 tons/hr = 67 hrs @ $85 = $5695 24