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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 />July 19, 2010 <br />l?iTr frenrge Patterson <br />General Mine Manager <br />Kerr Coal Company <br />P.O. Box 459 <br />Florence, CO 81226 <br />Re: Marr Mine, Permit No. C1980-006, Tipple Pond Sediment Yield Analysis <br />Dear Mr. Patterson: <br />COLORADO <br />D I V I S ION OF <br />RECLAMATION <br />MINING <br />SAFETY <br />Bill Ritter, Jr. <br />Governor <br />Mike King <br />Executive Director <br />Loretta E. Pineda <br />Director <br />The Colorado Division of Reclamation, Mining and Safety (Division) has reviewed the sediment yield <br />analysis for Kerr Coal Company's tipple pond (aka loadout pond) conducted by MWH. This analysis was <br />contained in your transmittal of May 14, 2010, which the Division received on May 17, 2010. <br />The analysis was found to be satisfactory. <br />One editorial mistake was detected: in the list of parameters for the RUSLE equation, the A value was <br />mistakenly labeled R. <br />Please contact me if you have any questions. <br />Sincerely, <br />1 4 / 2 . <br />Robert Zuber, P.E. <br />Environmental Protection Specialist <br />e <br />Office of Office of <br />Mined Land Reclamation Denver • Grand Junction • Durango Active and Inactive Mines