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-�-ak� ,qsti <br />December 18, 2014 <br />Mr. Peter S. Hays <br />Division of Reclamation, Mining & Safety <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RECEIVE <br />DEC 2 4 2014 <br />DIVISION OF RECLAMATION <br />MINING AND SAFETY <br />Re: Permit No. M- 2004 -051 — Wattenberg Lakes <br />Technical Revision — Slurry Wall <br />Dear Peter: <br />TRO / <br />9 <br />AGGREGATE <br />INDUSTRIES <br />In response to corrective action required by the Division following its monitoring inspection of <br />the Wattenberg Lakes operation on December 1, 2014, Aggregate Industries is submitting this <br />technical revision regarding the Pond 3 slurry wall. The Division cited as a problem that slurry <br />wall specifications and quality control procedures had not been submitted to the Division prior to <br />construction of the slurry wall. As required, please find enclosed a copy of the Technical <br />Specifications, including quality control procedures, as prepared by Tetra Tech. <br />As noted in Aggregate Industries' annual report for permit year ended February 10, 2014, the <br />slurry wall around Pond 3 was completed in June, 2013; therefore, in addition to the technical <br />specifications as required, we are enclosing for the Division's records a copy of the Construction <br />Completion Report prepared by Tetra Tech. Aggregate Industries Check No. 4000070293 in the <br />amount of $216.00 is also enclosed for the revision processing fee required. <br />If you need clarification or additional information regarding the annual report, please contact me <br />at (970) 396 -5252. <br />Very truly yours, <br />Connie N. Davis <br />Land Advisor <br />Enclosures <br />Aggregate Industries <br />West Central Region, Inc. <br />1687 Cole Boulevard, Suite 300 <br />Golden, CO 80401 <br />Telephone: 303 -985 -1070 An Equal Opportunity Employer <br />