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>1 . <br />t~ '.I <br />'tr, <br />• <br />COLORADO <br />March 25,1998 <br />r <br /> <br />~~ <br />COMPANY <br />• PETER C. LIEN (18981969) <br />CHARLES H. LIEN~PRESIDENT <br />BRUCE H. LIEN~CHAIRMAN OF THE BOARD <br />PETE L1EN-C.0.0. <br />CRUSHED LIMESTONE •GYPSUM •CALCIUM FEED SUPPLEMENT •SILICA SAND <br />Non-Metallic Minerals <br />P.O. Box 1961 <br />Fort Collins, CO 80522 <br />970(493-6294 <br />Fax: 9701490-1063 <br />Lorated 19 miles NoM of Fon Collins near Owl Canyon <br />A Division o} Pete Lien 8 Sons <br />P.O. Box 440 <br />Rapid City, SD 57709 <br />6051342-7224 <br />Fax: 6051342-6979 <br />Lorated at Interstate 90 8 Deadwood <br />To: Thomas A. Schreiner <br />STATE OF COLORADO <br />DfVION OF MINERALS AND GEOLOGY <br />~. From: Rob Kisner <br />Colorado Lien Company <br />9• <br />~: ~ Regazding: (Blasting) Large rocks left in the overburden stockpiles <br />,F. The blasting practices at Colorado Lien has always been to maximize 24" minus shot rock. When <br />w ~~ ~ ' the materials that are going to be used for reclamation and are loaded at the face. A cat 9881oader is <br />toed. The operator takes everything that is too large for the smaller 980 loaders to ptuh over Ute <br />reclamation dump and makes a pile along the tce of a existing road or dttmp area. As these azeas aze <br />being back filled with the smaller materials, the large rock are covered over and stay on the bottom or <br />(® floor of the quarry. <br />The second common practice is that almost all of reclamation dump areas are pushed to the east so <br />any large rocks will roll to the bottom. Colorado Lien has used a D8N for reclamation far years and <br />as far as I know, we have not had problems with rocks too large to move in the reclamation arra. <br />From your notes, D9 dozers would be used if the State had to reclaim Owl Canyon and Rex quarries. <br />Reduced ef&ciency or blasting of large rocks left in the stockpiles is not ceeded. <br />f• Please call me at 90793-8432 if you have any questions. <br />Sincerely, <br />Rob ICisner <br />~,~ ,, O <br />µ;: ~ ~ ~~~~~~ <br />+ Quatry Superintendent <br />cc: Sam Lien <br />Mike Golliher <br />