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ortnrtes <br />Geotechnlcal I Environmental Enplneerin` • tiatbials Te•dng <br />December 19, 2003 <br />RAG Twentymile Coal Company <br />29515 RCR #27 <br />Oak Creek, CO 80467 <br />Job Number: 03-5838 <br />Subject: GeotechnicaVPavement Design <br />Investigation, Proposed Intake Shaft Pad & <br />Access Road, Twenrymile Coal-Foidel <br />Creek Mine, Routt County, Colorado. <br />Ladies and Gentlemen: <br />This report presents [he results of the Geotechnical/Pavement Design Investigation for the proposed Intake <br />Shaft Pad and Access Road to be constructed within the Twentymile Coal-Foidel Creek Mine located in <br />Routt County, Colorado. The approximate location ofihe project site is shown in Figure #1. <br />The scope of our work included obtaining data from cursory observations made at the site, the logging of <br />six test holes, [he sampling of the probable foundation and subgrade soils and the laboratory testing of the <br />samples obtained. This report presents recommendations for economically feasible and safe type <br />foundations and roadways, as well as allowable soil pressures and other design and construction <br />considerations that are advisable, but not necessarily routine to quality design and building practices. <br />Proposed Construction: It is our understanding, based on conversations with the client, that the proposed <br />road will be a 24 feet wide gravel surfaced road that will be subjected to construction traffic and delivery <br />vehicles during construction of the Intake shaft and then be subjected to mainly pickup trucks after the shaft <br />has been completed. The Intake shaft road will be approximately 2900 feet in length from the existing <br />NWM Fan/Shaft Pad to the proposed Intake Shaft Pad, which will be approximately 280 feet by 280 feet in <br />size. It is also our understanding that the Intake Shaft Pad will consist of the construction of a small <br />concrete lined shaft with possibly small surrounding support structures. We have assumed that the support <br />structures will by one-story metal or wood framed structures with concrete slab-on-grade floor systems. <br />Based on the topography in the vicinity of the proposed roadway alignment, it appears that the cut and fill <br />slopes required to construct the subject roadway will typically be less than 5 feet in height. <br />For design purposes, we have assumed that the building loads for the support structures will be light to <br />moderate typical of type of construction. If loadings or conditions are significantly different from those <br />above, we should be notified to reevaluate the recommendations in this report. <br />Site Conditions: The proposed Intake Shaft Pad is located approximately 2900 feet northwest of the <br />' existing NWM Fan/Shaft Pad, which is situated north of County Road #33 within the Twentymile Coal- <br />{970) 879.7888 • Fax (970) 879.7891 • nwccl @mindspring.com <br />2580 Copper Ridge Drive • P.O. Box 775226 • Steamboat Springs, CO 80477 <br />