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The health and safety aspects of the mining <br /> program in Coal Basin will be markedly improved by extending the <br /> tunnel to the surface on the western slope of Huntsman Ridge. <br /> Not only will a west portal provide an <br /> alternate escapeway, but also it will contribute to a much improved <br /> ventilation system. <br /> (2) Project description <br /> In addition to this general description of <br /> the rock tunnel project, further details and description of the <br /> project, together with copies of correspondence with the concerned <br /> government agencies, are contained in Appendix II-B-5. <br /> The rock tunnel will consist of two parallel <br /> bores driven from a point near the intersection of the No. 1 Mine <br /> and No. 3 Mine haul roads approximately 13, 000 feet westerly to <br /> an intersection with the underground workings in the No. 1 mine. <br /> From the intersection with the No. 1 mine the twin bore tunnel <br /> will be extended an additional 2, 000 feet to a similar intersection <br /> with the overlying underground workings in the No. 2 mine. From <br /> the intersection with the No. 2 mine the twin bore tunnel will <br /> extend an additional 4000 ' to the outside or to the west side of <br /> Huntsman Ridge. This is a very important section of the tunnel <br /> plan as it will become the main air supply for the entire under- <br /> ground complex. Reducing the distance to the surface of the air <br /> ventilation system by about half will greatly improve its efficiency. <br /> This, in turn, will reduce the methane gas build-up problems in <br /> the mines and make them much safer. This tunnel will also supply <br /> the underground mine complex with an additional escapeway that <br /> 31 <br />