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_ P,evisien to Section 2.G5.4 ~ • <br />SuRrtnary of Building Removal Costs <br />Concrete Removal $ 7,948 <br />Concrete Loading 1,298 <br />Concrete Haulding 657 <br />Metal Building Removal 39,120 <br />49,023 <br />i•!ine Reclamation <br />The worst case for reclamation will be at `he end of 1984. <br />Backfill of Active Pit <br />To reclaim the pit and provide drainage, spoil material from the <br />permanent overburden dump would have to be hauled back into the pit. <br />Over a haul distance of 3,500, the grade = lro <br />From cross-section investigation, 1,000,000 yards must be moved. <br />Using a cat 637 scraper and the cat handbook, production rates <br />are: <br />i~ ' <br />Load Time 0.6 minutes <br />Time Loaded 1.5 minutes <br />Time Empty 1.4 minutes <br />Gump Time 0.6 minutes <br />Spot Delay 0.2 r~inutes <br />4.3 minutes <br />Trips aer 50 minute hour = 11.6 <br />At 90°o efficiency and 27.3 yards/load <br />Production rate per hour = 285 yd '/hr <br />Cu. yds at 285 yds/hr = 3,509 scraper fours <br />Scraper dozer ratio 4:1 <br />Use 4 scrapers, 1 dozer <br />Dozer hours = 877 hours <br />Cat 637 scrapers rent for 185.21/hr. <br />3509 scraper hours = 5649,902 <br />Revised September, 1984 <br />