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1 <br />1 <br />1 <br />t <br />TABLE 4-3 <br />ESTIMATED PRODUCTION RATE (1994-2021) <br />(TONS OF RAW COAL) <br /> D SEAM B SEAM TOTAL <br />1994 1,300,000 - 1,300,000 <br />1995 1,500,000 - 1,500,000 <br />1996 1,500,000 - 1,500,000 <br />1997 1,500,000 - 1,500,000 <br />1998 1,500,000 - 1,500,000 <br />1999-2003 4,764,000 2,736,000 7,500,000 <br />2004-2008 - 7,500,000 7,500,000 <br />2009-2013 - 7,500,000 7,500,000 <br />2014-2018 - 7,500,000 7,500,000 <br />2019-2021 - 3,418,000 3,418,000 <br />TOTAL 12,064,000 28,654,000 40,718,000 <br />4.2.7 Recovery Factors Recovery factors vary among different main and gate roads, <br />room-and-pillar panels and longwall panels. <br />' Only 36 to 39 percent of coal is recovered from the main or gate roads depending upon the numbers <br />of entries being developed. The higher the number of entries, the lower the recovery factor will be. <br />A three-entry gate road renders to a 39 percent recovery factor. This factor is 36 percent for a <br />six-entry main road. <br />' In the room-and-pillar panels, the final recovery, i.e. the ultimate pillar size that can be safely <br />extracted, depends upon the overburden thickness and the seam thickness. The recovery factor <br />' decreases with increasing overburden and/or seam thickness. In the Deserado Mine, this factor is <br />estimated at 64 percent. <br /> <br />t (Rev.3/30/95) 27 <br /> <br />