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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 />April 10, 2012 <br />Mr. Chris Zadel <br />Northern Colorado Constructors, Inc. Aggregate Div <br />9075 WCR 10 <br />Ft. Lupton, CO 80621 <br />Re: NCCI Pit #1, Permit No. M 2001 - 107, Technical Revision Approval, Revision No. TR - 7 <br />Dear Mr. Zadel: <br />On April 10, 2012 the Division of Reclamation, Mining and Safety approved the Technical Revision <br />application submitted to the Division on March 12, 2012, addressing the following: <br />The terms of the Technical Revision No. 7 approved by the Division are hereby incorporated into <br />Permit No. M- 2001 -107. All other conditions and requirements of Permit No. M- 2001 -107 remain <br />in full force and effect. <br />If you have any questions, please contact me at (303) 866 -3567 Ext. 8124. <br />Peter S. Hays <br />Environmental Protection Specialist <br />Cc: Tom Kaldenbach; DRMS <br />Office of Office of <br />Mined Land Reclamation <br />STATE OF COLORADO <br />COLORADO <br />D I V I S I O N O F <br />RECLAMATION <br />MINING <br />— &— <br />SAFETY <br />John Hickenlooper <br />Governor <br />Mike King <br />Executive Director <br />Loretta Pineda <br />Director <br />Re- establishment of standard deviation calculations for minimum and maximum water <br />level readings for monitoring wells MW -9 and MW -10. <br />Denver • Grand Junction • Durango Active and Inactive Mines <br />