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of Coto, <br /> °'9 <br /> �¢ C\ <br /> 01 DEPARTMENT OF NATURAL RESOURCES <br /> David H.Getches,Executive Director <br /> 1g <br /> �s8 MINED LAND RECLAMATION DIVISION <br /> 76 * DAVID C. SHELTON, Director <br /> Richard D.Lamm <br /> Governor <br /> n� <br /> September 23, 1986 <br /> Mr. Doug Bowman <br /> Mid-Continent Resources , Inc. <br /> P. 0. Box 158 <br /> Carbondale, Colorado 81623 <br /> Re: Slide Area Above No. 3 Mine Haulroad, File No. C-81-017 <br /> Dear Mr. Bowman: <br /> After my last inspection of the site I have several concerns over problems <br /> that could arise from further movement of the slide over the No. 3 Mine Haul- <br /> road. These concerns are: <br /> 1. Further slide movement in the Spring of 1987 could cause ponding in <br /> the creek bed between the haulroad culvert and the rock dust bin <br /> culvert. As slide movement generally coincides with high to moderate <br /> flow of the mountain streams , this condition could lead to overtopping <br /> of the creek bed. How will flow be assured? <br /> T <br /> 2 e culvert under the haulroad was originally designed to pass the <br /> 25 year event flow of the Dutch Creek Tributary. Is the capacity still <br /> oresent due to siltation? If not, what methods will be used to <br /> ensure capacity? <br /> Call if you wish to discuss these questions or if further clarification is <br /> needed. <br /> Sincerely, <br /> Candace M. Thorfipson <br /> Reclamation Specialist <br /> CMT/ddt <br /> 423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. (303) 866-3567 <br />