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-. . • iii iiiiiiiiiiiiiiii 999 STATE OF COLORADO DIVISION OF MINERALS AND GEOLOGY Deparlmenl of Natural Resources I~~~~ I .113 Sherman 51.. Room ? I i Denver, Colorado 80203 Phnne: (1011 666-7 567 FAX: I}0 }I 832-8106 DEPARTMENT OF May 13, 1998 ~ ~LUTR~CES Roy Romer Governor Craig D. Grotenhouse lames 5. Lochhead Pete Lien & Sons, IRC. Executive Dnecwr wtichael B. Long P.O. Box 440 Division Director Rapid City, SD 57702 RE: Owl Canyon Quarry, Reclamation Cost, Permit No. M-77-302 Rex Quarry, Reclamation Cost, Permit No. M-77-304 Deaz Mr. Grotenhouse: I have reviewed the Colorado Lien Company correspondence dated March 27, 1998 and March 30, 1998 regazding reclamation plan and reclamation cost concerns with the Owl Canyon and Rex Quarries. As previously indicated, the Division will proceed with a reclamation cost evaluation for each quarry according to the criteria listed in the Division's March 3, 19981etter. If Colorado Lien Company disagree's with the Division's interpretation of the reclamation plan(s) as indicated in our March 3, 1998 letter and would like to address the Boazd on this issue, we will schedule this matter for Boazd consideration at the next available meeting. Colorado Lien Company is also welcome, at any time, to submit an application for a permit amendment to revise the reclamation plan, reclamation plan maps, and required reclamation cost for each quarry. As you aze well awaze, the primary concern of the reclamation cost evaluation for each quarry is determining the volume of overburden to be moved during backfilling and grading to achieve the desired post-mining contours and land use. The Division will use the map of existing disturbance submitted by Colorado Lien on January 15, 1998 to verify the volume of overburden to be moved. The Division's interpretation of the reclamation plan for each quarry is that 1) quarried areas will be backfilled, 2) slopes will be graded to the extent that no slope exceeds 2:1, and 3) a majority of the reclaimed slopes will be graded at a slope of at least 3:1 or less steep. C olorado Lien Company's interpretation of the backfill and grading requirement is that pit highwalls and overburden outslopes need to be reduced only to the extent that these slopes aze no greater than 2: f . The volume of overburden to be moved under these two scenazios appears to be significantly different. It is the Division's position that the reclaimed slope cross sections provided by Colorado Lien Company on January 15, 1998 do not follow the 3 criteria listed above.