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BUCKHOR <br />GEOTECH <br />March 15, 2012 <br />Mr. Brock Bowles <br />DRMS <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: BOWIE NO. 2 MINE (PERMIT NO. C- 1996 -083) <br />COAL MINE WASTE BANKS 1, 2 & 4 <br />4 QUARTER 2011 INSPECTION REPORT REVIEW <br />SUBJ: RESPONSE TO DRMS COMMENTS, DATED FEBRUARY 23, 2012 <br />Dear Mr. Bowles: <br />In response to your letter to J.E. Stover & Associates, Inc., dated February 23, 2012, we offer the <br />following responses to your comments /questions. Our responses are in the same numeric order <br />as your comments in the referenced letter. <br />1. We have reviewed the Daily Compaction Report (DCR) for 10/5/2011 and concur with your <br />calculation for percent compaction for test # 547A. The compaction was erroneously <br />reported as 90.6 percent of the maximum dry density of 97.5 pcf. The correct percent <br />compaction should read 92.9 percent, which represents an in -situ density 90.6 pcf divided by <br />the maximum dry density of 97.5 pcf. A corrected DCR is attached herein. <br />2. The vibrating wire piezometers (VWP) have been damaged or buried beyond repair and new <br />VWP's should be installed. We are awaiting authorization from our client, Mr. Bill Bear, to <br />proceed with the new installation. We anticipate this will take place in the second quarter of <br />2012 when the site is more readily accessible after snow and ice have melted. <br />Thanks you very much for your comments on the 4 Quarter 2011 Instrumentation and <br />Inspection reports. Should you have any questions regarding this letter, please contact me at <br />(970) 497 -8852 or dan@ buckhorngeo.com. <br />Respectfully submitted, <br />Daniel C. Quigley, PE, PG <br />Buckhorn Geotech <br />Civil, Structural & Geotechnical Engineers <br />222 South Park Ave. • Montrose, CO 81401 <br />Ph.: (970) 249 -6828 • FAX: (970) 249 -0945 <br />Cc: Mr. Bill Bear — Bowie Resources, LLC (sent electronically this date) <br />Mr. Jim Stover, PE — J.E. Stover & Associates, Inc. (sent electronically this date) <br />RECEIVW <br />MAR 19 2011 <br />Division of Reclamation, <br />Mining and Safety <br />