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J. E. STOVER & ASSOCIATES, INC. <br />2352 NORTH 7T" STREEET, UNIT B <br />GRAND 3UNCTION, COLORADO 81501 <br />PHONE: (970) 245 -4101, FAX: (970) 242 -7908 <br />MINE ENGINEERING <br />MINE RECLAMATION <br />March 20, 2014 <br />Susan Burgmaier <br />Division of Reclamation, Mining & Safety <br />1313 Sherman St., Room 215 <br />Denver, CO 80203 <br />Re: Bowie Resources, LLC, Bowie No. 2 Mine <br />Technical Revision #85, Gob Pile #2 drying area <br />Adequacy response #2 <br />Permit C- 1996 -083 <br />Dear Ms. Burgmaier: <br />CIVIL ENGINEERING <br />CONST. MANAGEMENT <br />RECEIVED <br />MAR 2 5 2014 <br />DIVISION OF RECLAMATION <br />MINING AND SAFETY <br />The DRMS' letter dated February 26, 2014 requested additional information. On behalf <br />of Bowie Resources, LLC, enclosed are the requested data. <br />Rules 4.10.1 and 4.10.4 <br />As DRMS is aware, BRL has begun the process of switching from Buckhorn Geotech to <br />Huddleston -Berry Engineering and Testing (HBET) for geotechnical engineering and <br />field testing services. Please withdraw from consideration previously submitted <br />Buckhorn Geotech TR -85 stability analyses, and accept the attached stability analysis <br />from HBET. The new report addresses DRMS' questions originally drafted regarding <br />the Buckhorn analyses for TR -85. <br />Item resolved <br />2. DRMS: <br />a) Buckhorn provided two new stability analyses in the 04- Feb -2014 response. <br />The first evaluated the stability of Gob Pile #2 with an assumed phreatic surface at <br />the top surface of the compacted coal mine waste. The computed FoS (block <br />failure) for this analysis was 1.319, which is less than the 1.5 required by Rule <br />4.10.4(2). A minimum FoS of 1.5 must be maintained in the pile at all times. If the <br />pore pressures reported for VWP -06 and -08 dictate that the phreatic surface be <br />