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Ms. Kathy Welt <br />April 30, 2010 <br />Page 2 <br />5) Please resolve the apparent discrepancy between the table titled "TR-121 Project Details" <br />which indicates MDWs E3-72 and E3-73 will not be drilled, and the map titled "E Seam <br />MDW Drilling Plan" which shows an MDW with the designation `B3" near the east end of <br />panel E3. <br />6) DRMS is researching the need to update the E-seam underground mine plan (Map E 51) prior <br />to approving MDWs E3-75, 76, and 78 whose proposed bottomhole locations are outside the <br />currently approved mine plan. When does Mountain Coal Company anticipate Map E 51 will <br />be updated in the vicinity of these MDWs? <br />Sincerely, <br />j `«. <br />Tom Kaldenbach <br />Environmental Protection Specialist <br />cc (via email): Dan Hernandez, CDRMS