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<br />.~ <br />'1 <br />SCOPE <br />~ This report presents the results of a geotechnical investigation for <br />t <br />,S approximately 1,300 feet of haul road to be constructed at the Sno~~~nass <br />-i Coal Company near Carbondale, Colorado. The purpose of our <br />~ investigation was to provide design haul road cross-sections and to <br />satisfy the geotechnical requirements of the Colorado Mined Land <br />~ Reclamation Board pertaining to haul road construction. The report <br />,~ presents a description of geologic conditions along the proposed <br />~• alignment, design cross-sections, results of stability analysis, as well <br />as design and construction criteria for the haul roads. The report was <br />prepared based upon factual data gathered during a site reconnaissance, <br />information from previous investigations and our experience, A summary <br />of our findings and conclusions is presented below. <br />CONCLUSIONS <br />' 1. The existing road cuts indicate the underlying material <br />consists of Mancos Shale. Bedding planes dip tq the siest at <br />approximately 40 degrees. ,loint patterns tend to dip to the <br />southeast at 76 to 85 degrees. <br />2. Fill slopes should be stable at a slope ratio of 1.5:1 <br />(horizontal to vertical). Ten foot wide benches should be <br />• provided at a rate of one bench for each 5 feet of vertical <br />n elevation, Fill should be moisture treated to near optimum and <br />~j compacted to at least 95% of standard Proctor density (ASTh1 D <br />598}, <br />3. Cut slopes should be no steeper than 0.7:1 (horizontal to <br />vertical), <br /> <br /> <br />