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C~ <br />~fFri~S:f~37 • <br />PETER C. LIEN (19981969) <br />CHARLES H. LIEN~PRESIDENT <br />BRUCE H. L EN~CHAIRMAN OF THE BOARD <br />PETE LIEN~C.0.0. <br />APR 19 2000 <br />~ivisiar, ai ~iirerals & Geotog/ <br />COLORADO <br />~~ <br />CRUSHED LIMESTONE • GYPSUM • CALCIUM FEED SUPPLEMENT • SILICA SAND <br />Non-Metallic Minerals A Division of Pete Lien S Sons <br />P.O. Box 1961 <br />Fort Collins, CO 80522 <br />9701493.6294 <br />Fax: 970/490-1063 <br />P.O. Box 440 <br />Rapid City, SD 57709 <br />605/342.7224 <br />Fax: 6051342-6979 <br />Locoed al Interstate 90 8 Deadwood <br />COMPANY Located 19 miles North of Fad Collins near Owl Canyon <br />April 13, 2000 <br />Mr. Carl Mount ,.~, a' <br />CO Division of Minerals and Geology <br />1313 Sherman Street, Room 215 <br />Denver, CO 80203 <br />RE: Mine sequence change for Roberts Quarry, Permit 77-301 <br />Dear Carl, <br />Attached you will find a mine sequence change to the Roberts Quarry mine plan, Permit 77-301. <br />The changes that have been made to the mine plan outline the revised mine sequence for this <br />quarry. In addition the timetable for the proposed disturbance for each phase has been revised <br />to reflect a more realistic time schedule. There have been no changes to the affected area <br />boundary or any additions to the proposed total affected acres. At no time is it anticipated that it <br />will be necessary to exceed 54.5 acres of total disturbance. <br />To facilitate review of these changes, I have included a copy of the original mine plan with the <br />changes highlighted. If you have any questions regarding this sequence change please feel <br />free to give me a call at 605-394-7288. <br />Si~'"t^"'_ YC~ <br />Lecia Cral't <br />Environmental Engineer <br />Colorado Lien Co., a division of Pete Lien 8 Sons, Inc. <br />Enclosures <br />CC: Jerry Brown <br />Craig Grotenhouse <br />Rob Kisner <br />Ed Hubbeling <br />