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I •^ <br />Geotechnld / EnvironmenW Engineering • Materials Testing <br />December 22, 2003 <br />RAG Twentymile Coal Company <br />29515 RCR #27 <br />Oak Creek, CO 80467 <br />Job Number: 03-5838 <br />Subject: Geotechnical/Pavement Design <br />Investigation, Proposed Bleeder Shaft Pad & <br />Access Road, Twenrymile Coal-Foidel <br />Creek Mine, Routt County, Colorado. <br />Ladies and Gentlemen: <br />This report presents the results of the Geotechnical/Pavement Design Investigation for the proposed Bleeder <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 of the 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 />twelve test holes, the sampling of the probable foundation and subgrade soils and the laboratory testing of <br />the 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: If 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 constmction of the Bleeder shaft and then be subjected to mainly pickup trucks after the <br />shaft has been completed. The Bleeder shaft road will be approximately 7100 feet in length from the <br />existing road to the proposed Bleeder Shaft Pad, which will be approximately 280 feet by 280 feet in size. <br />It is also our understanding that the Bleeder Shaft Pad will consist of the constmction of a small concrete <br />lined shaft with possibly small surrounding support stmctures. We have assumed that the support structures <br />will by one-story metal or wood framed structures with concrete slab-on-grade floor systems. Based on [he <br />topography in the vicinity of the proposed roadway alignment, it appears that the majority of the cut and fill <br />slopes will probably be less than 5 fee[ in height. However, it appears that considerably higher cut and fill <br />slopes maybe required in [he roadway alignment located between test holes 4 to 6. <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 constmction. If loadings or conditions are significantly different from those <br />above, we should be notified to reevaluate the recommendations in this report. <br />• <br />(970) 879.7888 • Faz (970) 879.7891 • nweelQmindspring.com <br />2580 Copper Ridge Drive • P.O. Box 775226 • Steamboat Springs, CO 80477 <br />