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STATE OF COLORADO <br />DIVISION OF RECLAMATION, MINING AND SAFETY <br />Department of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phone: (303) 866-3567 <br />FAX: (303) 832-8106 <br />November 10, 2008 " ? <br /> <br /> <br /> <br /> SAFETY <br />7 Z.70?i <br /> <br />"f Bill Ritter, Jr. <br />pjLISIOi1l.' '' Governor <br /> Harris D. Sherman <br /> Executive Director <br />Mr. Ed Benson Ronald W. Cattany <br />21240 Austin Road Division Director <br />Colorado 81410 Natural Resource Trustee <br />Austin, <br />I0,`Benson Brothers Red Shale Pit, Permit No. M-2005-071, Review of Vibration Monitoring Study <br />Results and Request for Additional Information <br />Dear Mr. Benson: <br />Enclosed please find the DRMS review of the vibration monitoring results from the study conducted in <br />July and August of 2008 at the Benson Brothers Red Shale Pit. The review requires that additional <br />information be submitted to DRMS in order to bring the study into compliance with the terms of <br />approval for Permit No. M-2005-071. Please forward this information to Revey Associates, Inc. and to <br />PreSeisTek so they can provide the additional required information. <br />Also enclosed, for your information, are comments submitted to DRMS by Mr. Lazear in response to the <br />vibration study. <br />Please submit your response to this request by no later than December 5, 2008 so the vibration study <br />requirement for this permit can be completely addressed. <br />If you need additional information, please contact me at the Division of Reclamation, Mining and <br />Safety, Grand Junction Field Office, 101 South Third Street, Room 301, Grand Junction, Colorado <br />81501, telephone no. 970-243-6368. <br />Sincerely, <br />Steve S. Shuey <br />Senior Environmental Protection Specialist <br />Cc: Allen Sorenson - DRMS w/o enclosures. <br />Greg Lazear <br />COLORADO <br />DIVISION O F <br />RECLAMATION <br />MINING <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines