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` -30- <br />D. Scraper Work (Cat 633D) <br />A review of Map 3AR1 indicates that the one-way haul distance <br />for transporting topsoil from stockpile A to the Period 3R1 and <br />4R1 Areas is approximately 2,300 feet. The average one-way <br />haul distance from Stockpile A to the coal crusher and parking <br />lot/surface facilities area (5,718 cu. yds.) is approximately <br />650 feet. <br />i. Hourly production - Topsoil replacement on 3R1 and 4R1 <br />areas: <br />633D load time = .9 min <br />haul = 6.4 <br />maneuver & dump time = .7 <br />Return time = 1.2 <br />~~ min/cycle = 6.52 cycles/hr <br />34 cu. yds./cycle x 6.52 cycles/hr = 221.68 cu. yds./hr <br />(unadjusted) <br />Adjusted production = 221.68 cu. yds./hr x .83 job <br />efficiency = 183.99 LCY/hr <br />Unit cost = E 1.06/LCY <br />ii. Hourly production - Topsoil replacement on crusher and <br />parking lot area. <br />633D load time = .9 min <br />haul = .65 <br />maneuver 8 dump time = .7 <br />Return time = .55 <br />~~min/cycle = 21.43 cycles/hr <br />34 cu. yds./cycle x 21.43 cycles/hr = 728.62 cu. yds./hr <br />(unadjusted) <br />Adjusted production = 728.62 cu, yds./hr x .83 job <br />efficiency = 604.75 LCY/hr <br />Unit cost = S .32/LCY <br />5. Determination of Worst Case Disturbance <br />In order to properly evaluate the worst case situation at the <br />Chimney Rock Mine, the operator needs to provide the Division with <br />specific information on the current status of pit development and <br />reclamation. This should include information on: <br />