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_.__.~. <br /> <br />2.05.4 (b) <br />RESPONSE continued <br />Costs for removal of concrete pads, foundations and <br />structures were determined based on use of a hydraulic <br />impact breaker for breakage, front-end-loader for <br />loading, and 50-ton end dump trucks for haulage of <br />concrete to the bottom of the pit for burial. Specific <br />equipment used for the estimate were a 270-HP 4336 <br />hydraulic impact breaker mounted on Pratt Model 80 back- <br />hoe, a Hough 400 front-end loader, and International <br />350 Payhauler trucks. <br />Production Rates, Equipment and Manpower requirements <br />for concrete removal are summarized on the following <br />calculation sheets. <br />Cost Breakdown: <br />• <br />Operation Equipment Equipment Cost Operator Cost Total <br />Breaker Backhoe Breaker $5299.00 $1080.00 $6379.00 <br />Loading Front-end Loader 458.00 75.00 533.00 <br />Hauling 50-Ton Truck 379.00 75.00 454.00 <br /> TOTAL $6136.00 $1230.00 $7366.00 <br />BACKFILLING OF ACTIVE PIT <br />Costs for backfilling the active pit area were developed <br />based on hauling the overburden located in the unreclaimed <br />portion of the permanent overburden dump to the active <br />pit area. Equipment used for the backfilling operation <br />are TS 24 scrapers and D-9 dozers. Cost Detail for the <br />the backfilling operation are itemized in the following <br />calculation sheets. <br />Cost Breakdown: <br />Operation Equipment Equipment Cost Operator Cost Total <br />Haulage Scraper $525,490 $93,720 $619,210 <br />Dozer 166,564 31,320 197,884 <br />TOTAL $692,054 $125,040 $817,094 <br /> <br />