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Chapter II <br />• <br />The permit area is shown on map II-B-1; Sequence of Mining Operations during the <br />permit term is shown on maps II-B-2 & II-B-3. Surface Facilities and Disturbed Areas <br />are shown on Maps II-B-4 a through e. <br />b. Underground Mining <br />The coal reserves generally extend west and south of the Huntsman Ridge. Mining <br />follows the coal reserves to the west and south of Huntsman Ridge. <br />The underground workings have been developed as a series of five main entries <br />following the two coal seams down-dip from outcrop, with portal areas constructed <br />at outcrop points. <br />The coal seams outcrop along the sides of the Basin at elevations ranging from <br />approximately 9,500 feet to 10,700 feet. <br />Entries # 1, # 3, # 4 and # 5 were driven to produce coal from the lower B-bed <br />seam; Entry # 2 was driven to produce coal from the upper, M-bed seam. <br />Production from the workings accessed by each of the main entries (through 1986), <br />is as follows: <br />PRODUCTION <br />• <br />• <br />1956-1986 <br />YEARS OF PRODUCTION TOTAL PRODUCTION* <br />No. 1 No. 1 <br />1956-86 7,690,292 <br />No. 2 <br />1965-66 <br />1973-86 <br />No. 2 <br />4,864,625 <br />No. 3 <br />1966-82 <br />1984-85 <br />No. 4 <br />1969-80 <br />No. 5 <br />1973-82 <br />* Clean coal tonnages. <br />No. 3 <br />4,949,828 <br />No. 4 <br />817,137 <br />No. 5 <br />1,010,864. <br />13 <br />