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CONTRACTORS <br /> ENGINEERS <br /> DEVELOPERS <br /> • <� MORRISON-KNUDSEN COMPANY, INC. <br /> EXECUTIVE OFFICE <br /> TWO MORRISON-KNUDSEN PLAZA <br /> P.O. BOX 7808/BOISE,IDAHO 83729/ U.S.A. <br /> PHONE:(208)345-5000 /TELEX:368439 <br /> December 5, 1979 <br /> Mr. Join Turner <br /> Vice-President <br /> Mid-Continent Resources, Inc. <br /> Carbondale, Colorado 81623 <br /> RE: Final Report - Drainage Control Haulage P.oads, Coal Basin Mines, Pitkin <br /> County, Colorado. Project 1097-13 (0437-103) <br /> ATTN: Mr. Doug Bowman <br /> Dear Mr. Turner: <br /> At your request Morrison-Knudsen's Mining, Group has prepared the attached final <br /> report and drawings on drainage control of coal haulage roads (Class I) in <br /> Coal Basin, Pitkin County, Colorado. <br /> The conclusions drawn from this study are: <br /> 1. Seventeen additional culverts are required <br /> 2. Six of the proposed culverts are critical <br /> 3. Road F to Mine­ 3 requires the most new culvert structures <br /> 4. Other roads requiring culverts include Road B, Road C, Road D and <br /> Road G <br /> 5. Existing drainage culvert structures are adequate to manage runoff <br /> derived from a 10-year/24-hour storm <br /> If you. have any questions concerning this report, please call me. <br /> (Telephone (208) 386-6531) <br /> Sincerely, <br /> Ellery H. Wilson, PE <br /> cc: Roger Funston <br /> Keith Kirk <br /> Ydk—e Sanossian <br /> Attachments: 3 copies of report <br /> 3 <br />