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page 2 <br />walls. Subsidence under the remainder of the East Lease r;ould only <br />• result in lov,ering the elevation of the earth's surface, some surface <br />tension cracks; but r•+ould result in no real damage to the wildlife <br />resources. <br />Subsidence Control Plan <br />(A) A Description of the East Lease Mining Plan C-27103 - <br />liining of the East Lease will be done with Joy continuous <br />miners and shuttle cars, utilizing conveyor belts for <br />haulage. "reduction is projected to average 100 tons <br />per machine shift. Two sets of five entry mains will <br />be driven frow the existing East Hine, they will bo lst <br />East M1lains and 6th East ^lains. Entry widths r~+ill be <br />• 18 to 20 feet. The entries will be driven on 70 to 100- <br />foot entry centers by 70 to 120-foot cross-cut centers. <br />Production sections will be turned north off of the <br />eastward trending main entries. Production sections <br />will consist of 4-6 entries driven on 60 to 100-foot <br />entry centers by 50 to 120-foot cross-cut centers, again <br />with 13 to 20-foot entry widths. No rooms will be <br />developed off of the mining sections. The chain pillars <br />will be pulled and barriers betr•+een sections will be <br />reduced to 50 feet. Western Slope Carbon, loc. (IdSC) <br />feels that this configuration '.:ill yield the greatest <br />extraction and will result in the best overall economic <br />recovery of the coal reserves. <br />• The 6th East Mains will be fully extracted v+ith <br />