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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Depamnmt of Natural Resources <br />1313 Sherman St., Room 215 <br />Denver, Colorado 80203 <br />Phme: (303) 866.3567 <br />FAX: (303) 832A106 <br />June 27, 2006 <br />Mr. Steve O'Brian <br />Environment, Inc. <br />7985 Vance Dr. #205A <br />Arvada, CO 80003 <br />RE: M-1977-526 Amendment <br />~~ <br />Dear Mr. O'Brian: <br />bank-~dc~ i s~~ <br />COLORADO <br />D IVI510 N OF <br />MIN 6RALS <br />GEOLOGY <br />RE CLA MATZO N•MINING <br />Bill Owens <br />Governor <br />Russell George <br />Exenrtive Direoor <br />Ronald W. Cattany <br />Division Diretlor <br />Natural Resource Trustee <br />The Division has completed the review of your Board Ordered <br />Amendment application for the Slurry Wall that was put in <br />place by Lafarge on your behalf. It is the understanding of <br />the Division from the field inspection and what was <br />submitted in the application that the slurry wall design <br />Construction and QA/QC, was approved by the State <br />Engineer's Office. Final approval is still pending, once <br />the final approval is submitted to the Division, DMG will <br />adjust the warranty in accordance with the in house policy <br />for Slurry walls. Until such approval is provided to the <br />Division, the full warranty for the construction of the <br />slurry wall will be required at this time. The full <br />warranty for the slurry wall construction is $264,000.00, <br />which includes the 10~ in-direct coat. <br />It is also the understanding of the Division that the <br />operator has provided the State Engineer as it is required <br />under their rule to provide a list of all known ground <br />water wells with in 600 feet of the slurry wall for <br />possible impacts and that they have rendered a favorable <br />decision regarding the placement of the slurry wall. If <br />such is the case please acknowledge. <br />Are there any domestic or other kinds of <br />with in 600 feet of the slurry wall that <br />impacted by placing such a restriction to <br />Please explain. <br />ground water wells <br />could possibly be <br />the GW FLOW ? <br />C~ce of Office of Colorado <br />Mined Land Reclamation Active and Inactive Mines Geological Survey <br />