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• ~. <br />• 2.05.3(1) <br />projections west. See 1•'.ap 2.05.3(1)-1 for location o` the holes, <br />and Figures 2.04.5-24 and 25 for driller's log of the holes. To <br />- mine through the poor conditions as fast as possible the #1 entry <br />was dropped from crosscut 15+60 to 23+20 and the crosscut centers <br />_ were extended to 120 feet. The roof was saturated with water <br />and conditions were such that in addition to the coal, up to 4 feet <br />of rock was mined in this area. 47est of Ward Creek., good roof <br />conditions were encountered. ;9ining under 47illiams Creek showed <br />no poor conditions that could be attributed to the Creek. As with <br />the #1 forth Mains, the #1 West Submains will allow for further <br />extension upon acquisition of additional coal. <br />A proposal for the Williams Creek air course was to drive south <br />to the outcrop with three entries reaching the surface. Poor coal <br />quality south of the #1 West Submain has resulted in cessation of <br />•- mining south at this time. Projections and proposed surface <br />- ~ disturbance for portals will be submitted to the Division if r.ew <br />plans are made to mine south. <br />Panels will be driven north of the #1 [4est Submains. T^e panels <br />will be approximately 480 feet wide and will be mined either the <br />^ full width in advance or with as few entries as possible in <br />advance and rooms to full width on retreat. In either case, a 50 to <br />55B extraction is planned. See Map 2.5.3(1)-1 for details of <br />panel lay out, and Drawing 2.05.3(1) for typical e:;tractica :~etl-.ods <br />The Mains and Submains will be protected by a 100 to 200 foot trick <br />barrier pillar. A 40 foot barrier will be left bet~.~een panels and <br />will be incorporated into the extraction ratio calculation. Entry <br />and crosscut widths will be 1G - 20 feet witki 19 feet as an average. <br />Another set of entries, Al East Submains, has been started <br />opposite the #1 [•7est Submains in the SD/9 ,7?7/4 of Section 12. <br />• . <br />REVISED 2-12-82 81 <br />