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t [.oioraao t,onsui[ants. inc. <br />Geotechnical /Environmental Engineering • Materials Testing <br />October 9, 1995 <br />Twentymile Coal Company <br />29515 RCR #27 <br />Oak Creek, CO 80467 <br />Attn: Mr. Rick Mills <br />Subject: Pavement Evaluation & <br />Recommendations, Pond A Access Road, <br />Foidel Creek Mine, Routt County, <br />Colorado. <br />Gentlemen: <br />This report presents the results of a pavement evaluation and recommendations for the Pond A Access <br />Road located on the Foidel Creek Mine property in Rout[ County, Colorado. <br />A field exploration program was conducted to obtain information on the subgrade conditions at the <br />• site. Material samples obtained during [he subsurface investigation were tested in the laboratory [o <br />provide data on the classification and engineering characteristics of [he subgrade soils. The results of <br />the field and laboratory investigations are presented herein. <br />This report has bees prepazed [o summarize the data obtained and to present our conclusions and <br />recommendations, based on the existing conditions encountered and the assumed traffic loadings. A <br />discussion of geo[echnical engineering considerations related to resurfacing of the access road are also <br />included. <br />We understand that this access road is approximately 3,700 fee[ in length. The access road will <br />typically be subjected to pickup truck traffic and occasional delivery and construction truck traffic; <br />however, the northern 2,000 Feet of the roadway situated between the batch load out facility and the <br />dragline will be subjected to a considerable amount of heavy truck traffic associated with the <br />disassembly and removal of the dragline from [he mine property. <br />Subsurface Conditions: The field investigation for this project was conducted on September 13, 1995. <br />Four (4) test holes were advanced along the roadway to explore the subgrade conditions and to obtain <br />samples for laboratory testing. The test holes were drilled with a [rack-mounted drill rig utilizing 6- <br />inch diameter augers. The test holes were advanced to depths ranging from 3 to 4 feet. The test holes <br />were logged by a representative of Northwest Colorado Coosul[ants, [oc. Graphic logs of the test holes <br />are not drawn; however, a discussion of the subgrade soil types encountered in the test holes are <br />. presented later in this report. <br />(970) 879.7888 • Fax (970) 879.7891 <br />29585 U.S. 40 West, Box 775226 • Steamboat Springs, CO 80477 ~R a6 <br />