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C--I 1 Y b-- OCR /_- <br />WWE <br />Wright Water Engineers, Inc. <br />2490 West 26th Ave., Suite l 00A ~wwrightwater.com <br />Denver, Colorado 80211 January 18, 2010 e-mail:wwe@wrightwater.com <br />(303) 480-1700 TEL <br />(303) 480-1020 FAX <br />Via US Mail RECEIVED <br />Tom Kaldenbach IAN 2 0 2010 <br />Colorado Division of Reclamation, Mining & Safety Division ur Keclamation, <br />1313 Sherman Street, Room 215 Mining and Safety <br />Denver, CO 80203 <br />Re: Corrected Pages in the Spring 2009 Subsidence Report - Mountain Coal Company <br />Dear Tom: <br />Enclosed please find two, three-hole punched pages to be inserted as replacements in the Spring <br />2009 Subsidence and Geologic Field Observations Report previously submitted by Mountain <br />Coal Company, LLC. Both replacement pages provide information pertaining to the pre, during, <br />and post mining surveys of B-Seam Longwall Panel 25. <br />The first enclosed page is a replacement for previously submitted Page 13. Changes to this page <br />are solely within Section 3.3 (B-Seam Survey Information of Panel 25). The second enclosed <br />page is a replacement for previously submitted Appendix D. This table of information pertains <br />to the three required surveys of B-Seam Longwall Panel 25 (i.e., pre, during, and post mining). <br />Please feel free to contact me should you have any questions. <br />Very truly yours, <br />WRIGHT WATER ENGINEERS, INC. <br />By <br />Vi <br />Enclosures: Replacement for Page 13 <br />Replacement for Appendix D <br />cc: Kathy Welt, Mountain Coal Company, LLC <br />Jonathan Kelly, WWE <br />P.G. <br />t/Sr. Hydrogeologist <br />Z:\Project Files\72-99\831-032\831-032.791\Enlrineering\Spring 2009\Replacement Pages 011810 GDW.doex <br />GLENWOOD SPRINGS DURANGO <br />(970) 945-7755 TEL (970) 945-9210 FAX (970) 259-7411 TEL (970) 259-8758 FAX