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Geatechnld /Environmental EnElneadnE • Matertalc <br />]anuary 20,2006 <br />Twentymile Coal Company <br />29515 County Road 27 <br />Oak Creek, CO 80467 <br />Attn: Mike Berdine <br />Job Number: OS-6818 <br />Subject: GeotechnicalInvestigation,Proposed <br />South Haul Road, Foidel Creek Mine, Routt <br />County, Colorado. <br />Gentlemen: <br />As requested, NWCC, Inc. has completed this Geotechnical Investigation to investigate the subsurface conditions <br />along the proposed South Haul Road alignment, as well as to provide recommendations regarding the site grading <br />and possible grave] pavement section alternatives for the new roadway to be constructed south of County Road 27 <br />and at the Foidel Creek Mine in Routt County, Colorado. The approximate location of the project site is shown in <br />tht attached Figure #1. <br />Prooo<ed Construction: It is our understanding that the South Haul Road Option #1 will consist of approximately <br />2,900 feet of new two-lane roadway [hat will along the south side of County Road 27. Option #2 will consist of the <br />improvement of approximately 1,200 fee[ of existing roadway located neaz the southeast end of Option #1. The <br />road will be used for heavy haul truck access from the mine to County Road 27 and will be subject to very heavy <br />loading conditions. Based on our observations of the proposed alignment, it appears that cuts up to 5 feet and 511 <br />slopes up to ] 0 feet in height may be required to develop the roadway. <br />Site Conditions: The project site for Option #1 generally consists of vacant land located along the south side of <br />County Road 27. The proposed alignment roughly parallels the south side of County Road 27, near and sometimes <br />within the toe of the existing roadway fill slope. The topography of the site is variable and generally slopes gently <br />to strongly down to the south and west. <br />Option #2 consists of an existing grave]-surfaced roadway located south of County Road 27 and east of the east end <br />of the Option #1 alignment. The topography of the site is similar to that of Option #1. Both sites are similarly <br />vegetated with grasses, weeds and sagebrush. <br />• (970) 879.7888 • Fex (970) 878.7891 <br />2580 Copper Ridge Drive • Steamboat Springs, CO 80487 <br />