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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman Sc, Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br />November 2, 2006 <br />Mr. Michael L. Ripp <br />MVR Resources, Inc. <br />COLORADO <br />DIVISION OF <br />RECLAMATION <br />MINING <br />- &- <br />SAFETY <br />Bil I Owens <br />Governor <br />Russell George <br />E.eecutive Director <br />Ronald W. Cattany <br />P. O. Box 54 <br />Division Direcor <br />Delta, Colorado 81416 ~ Natural Resource Trustee/ <br />RE: Benson Brothers Red Shale Pit, File No. M-2005-071°Vibration Monitoring Plan Adequacy Review " <br />Dear Mr. Ripp: <br />DBMS has completed review of the Revey Vibration Monitoring Plan submitted June 2, 2006 and the <br />addendum submitted October 25, 2006 to satisfy the one stipulation of the conditional approval for the <br />Benson Brothers Red Shale Pit Permit, File No. M-2005-071. The proposed monitoring plan will be <br />considered adequate to satisfy the requirements of Stipulation No. 1 upon submittal of a commitment that <br />states: <br />PreSeisTek, Inc. will certify that the seismographs conform to standards recommended by the <br />vibration section of the International Society of Explosives Engineers and that the instruments have <br />been calibrated by the manufacturer in the 12 months prior to their use at the site. <br />Upon submittal of this written commitment and an adequate performance warranty, the permit will be <br />issued. Elizabeth Shelton, DRMS Denver Office, has indicated the Financial warranty is now acceptable. <br />Please submit the executed original Performance Warranty to Elizabeth Shelton in our Denver Office and <br />submit the written commitment to my attention at our Grand Junction Office. <br />Thank you for your cooperation in this matter. <br />If you need additional information, please contact me at the Division of Reclamation Mining and Safety, <br />Grand Junction Field Office, 101 South Third Street, Room 301, Grand Junction, Colorado 81501, telephone <br />no. 970-243-6368. <br />Sincerely, <br />.. ~~~~ <br />///~ <br />RE~EINF® <br />N~V ~ 6 ~~~u6 <br />pivision o. ^eOSa e~ n, <br />Mining and <br />Steve S. Shuey <-- <br />Environmental Protection Specialist <br />Cc: w/copy of Vibration Monitoring Plan and Addendum <br />Mr. Bill Welch <br />18905 Ward Creek Road <br />Cedaredge, CO 81413 <br />Office of Office of <br />Mined Land Reclamation Ac[ive and Inactive Mines <br />