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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />1373 Sherman St., Raom 275 <br />Denver, Colorado 80203 <br />Phone: (303) 8663567 <br />FAX: (303) 832$106 <br />May 1, 2006 <br />Mr. Mazk Vigil <br />Lafarge West, Inc. <br />10170 Church Ranch Way, Ste. 200 <br />Westminster, CO 80021 <br />RE: Adequacy Review Comments -North Bank Pit, Regular 112 Application <br />Class: Permit, File No. M-2006-018 <br />Dear Mr. Vigil: <br />COLORADO <br />DIVISION O F <br />MINERALS <br />GEOLOGY <br />EF CLANATION•NINING <br />EAf ETY•ECIENCE <br />Bill Owens <br />Governor <br />Russell George <br />Executive Director <br />Ronald W. GananY <br />Division Director <br />Natural Resource Trustee <br />Listed below are adequacy review comments on the above-captioned Regulaz 112 application for <br />237.67 acres located 2.2 miles east of Rifle. The decision date for your application is scheduled <br />for May 25, 2006. Therefore, I would appreciate a response from you on or before May 21, <br />2006. (Your response should include two (2) copies). Please be advised that your application <br />maybe deemed inadequate and maybe denied on May 25, 2006 unless the following adequacy <br />review items aze addressed to the satisfaction of the Division. If you need additional time to <br />prepaze an adequacy response, please let us know in writing on or before May 21, 2006; and you <br />may wish to request an extension of the decision date. <br />6.4.2 EXHIBIT B -Index Mao <br />1. The applicant has provided an Index Map and Mining Plan Maps as required by Rules 6.4.2 <br />and 6.4.3. In order to help chazacterize the current condition and location of the Colorado River <br />and adjacent floodplains within the proposed affected land and surrounding area, the Division <br />requests that the applicant provide a current aerial photograph of the proposed affected land and <br />surrounding area. The Division recognizes that the fluvial system that the applicant will be <br />operating inclose proximity to is a dynamic system and subject to periodic changes during high <br />flow events. This information will be useful to document baseline conditions of the azea. Please <br />provide, if available. <br />6.4.4 EXHIBIT D - Minin¢ Plan <br />2. The applicant specifies that excavation will occur at the North Bank Pit via conventional dry <br />mining methods and de-watering so that excavation may occur below the groundwater surface. <br />Office of Office of Colorado <br />Mined Land Reclamation Active and Inactive Mines Geological Survey <br />