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iii iiiiiiiiiiiuiii <br />MINED LAND RECLAMATION DIVISION <br />Department of Natural Resources <br />t313 Sherman St.. Room 215 <br />Denver, CG 80203 <br />303 866-3567 <br />FA x: 303 832 8106 <br />December 3, 1991 <br />Mr. Gary W. Wendt <br />Peabody Coal Company <br />1300 South Yale <br />Flagstaff, Arizona 86001 <br />RE: Further Adequacy Requirements for Diversion No. 1, TR - 22, <br />Seneca II Hine, Permit No. C-80-005 <br />Dear Mr. Wendt: <br />OF'COrO <br />~e/~? <br />NTr Y.arC'7c <br />\~re76 <br />Roy Romer <br />Governor <br />Fretl R. Barra. <br />Drv~sion Director <br />The Division has completed the review of adequacy answers submitted by Peabody <br />Coal Company on November 14, 1991. We agree with moat material submitted but <br />still have two concerns as follows: <br />1. Our map measurements indicate that some Diversion 1 slopes will <br />exceed 17 percent. Our SEDCAD computer rune indicate that riprap <br />sizing for the flows involved change at 17 percent slope values. <br />Please indicate in the permit pages that slopes will be held to less <br />than 17 percent or provide a riprap design for ditch reaches that <br />exceed 17 percent. <br />2. The vegetated portions of Diversion 1 will need some type of <br />stabilization prior to vegetation establishment. Please propose <br />some means to accomplish this. ' <br />We have no further concerns at this time <br />questions. <br />Sincerely, <br />_~ _ r ~ j _- ~ _. <br />Carl B. Mount ~] <br />Reclamation Specialist <br />CHM/eke <br />STAr~ OF COLORADO <br />Please contact me with any <br />9733F <br />