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STATE OF COLORADO <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />) 313 Sherman St., Room 2) 5 C O L D RA D O <br />Denver, Colorado 80203 DIVISION O F <br />Phone: (303) 866-3567 MINERAL S <br />FAX: (303) 832106 <br />GEOLOGY <br /> 0.ECLAMATION•NINING <br /> SAFETT•SCIENCE <br />Bill Owens <br />Gavemor <br />Russell George <br />Executive Director <br />Jul 29, 2005 Ronald W. Cavany <br />y Division Director <br />Natural Resource Trustee <br />Grant Johns <br />American Civil Constructors, Inc. <br />410 20th St., Ste. S-1 <br />Glenwood Springs, CO 81601-4272 <br />Re: Final Summary Sediment Pond Certification <br />Rimrock Strip Mine (Permit No. C-89-074) <br />Dear Mr. Johns: <br />The Division of Minerals and Geology (Division) has reviewed the final summary sediment <br />pond certification by Greg Lewicki and Associates for the Rimrock mine. <br />The report complies with the requirements of Rule 4.05.6(13) for inspection of sediment ponds <br />at coal mining sites. This single pond is approved to remain as a permanent impoundment <br />following final approval of the pending Phase II/III bond release (SL-02) at the site. The <br />observations and color photographs in the report document conditions as observed and <br />reported by Division inspectors over the years. We concur with the observations as noted. <br />We have no questions regarding the report. This is the final pond inspection report for the <br />Rimrock mine. Thank you for your diligence in completing your monitoring requirements in <br />accordance with the Rules governing coal mining. <br />If you have any questions, please contact me. <br />Sincerely, <br />Kent A. Gorham <br />Environmental Protection Specialist II <br />Office of Office of Colorado <br />Mined Land Reclamation Active and Inactive Mirtes Geological Survey <br />