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III IIIIIIIIIIIII III <br />999 <br />STATE OF COLORr~DO ~ <br />DIVISION OF MINERALS AND GEOLOGY <br />Department of Natural Resources <br />I l l ] Sherman 51., Roum 215 <br />Denver, CO 80203 <br />Phone: 13031 866-7 567 <br />PAX: (303) 832-8106 <br />November 11, 1993 <br />Dr. W.D. Corley <br />The Corley Company <br />P.O. Box 1821 <br />Colorado Springs, CO 80901 <br />RE: West Pit Diversion at the GEC Mine <br />Dear Dr. Corley, <br />OF ~~/.. <br />ti4' <br />F~ ~ ~~ <br />.` <br />IH'!6 <br />Roy Romer <br />Governor <br />Michael B Long <br />Division Director <br />The letter to you dated November 8, 1993 and the attached Field <br />Directive contained in error in the rip-rap size for the West Pit <br />Diversion ditch. The correct rip-rap size is as follows: <br />DroaX = 26.25 inches (2.188 feet) <br />D50 = 21 inches (1.750 feet) <br />D10 = 7 inches (0.583 feet) <br />Enclosed, please find the revised draft field directive. A copy <br />has also been sent to Phil Kessler. <br />Sincerely, <br />~~ s~ <br />Erica S. CrosbyLf~ <br />Project Manager <br />cc: Larry Routten <br />David Berry <br />enclosure(s) <br />m:\coal\esc\gec\931112 <br />