Laserfiche WebLink
oioraao t.onsuitants <br />Geo[echnical I Environmental Engineering • Materials Testing <br />October 9, 1995 <br />Twentymile Coal Company <br />29515 RCR #27 <br />Oak Creek, CO 80467 <br />Af[a: Mr. Rick Mills <br />Subject: Pavement Evaluation & <br />Recommendations, PM Bay 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 [he PM Bay 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 the subsurface investigation were tested in the laboratory to <br />provide data on [he clazsification and engineering characteristics of the subgrade soils. The results of <br />the field and laboratory investigations are presented herein. <br />This report has been prepared to summarize the data obtained and [o present our conclusions and <br />recommendations, based on [he existing conditions encountered and the azsumed traffic loadings. A <br />discussion of geotechnical engineering considerations related to reconstruction of the access road are <br />also included. <br />We understand that [his road is approximately 1/2 mile in length. The access road will generally be <br />subjected to a large number of construction vehicles and delivery trucks. <br />Subsurface Conditions: The field investigation for this project was conducted on September 13, 1995. <br />Four (4) test holes were advanced at the site to explore the subgrade conditions and to obtain samples <br />for laboratory testing. The test holes were drilled with atrack-mounted drill rig utilizing 6-inch <br />diameter augers. The test holes were advanced to depths ranging from 3 to 4 feet. The test holes were <br />logged by a representative of Northwest Colorado Consultants, Inc. Graphic logs of the test holes are <br />not drawn; however, a discussion of the subgrade soil types encountered in the test holes are presented <br />later in this report. <br />Samples obtained from the test holes were examined and clazsilied in the laboratory by the project <br />• engineer. Laboratory testing included standard property tests, such az natural moisture contents, dry <br />um[ weights, grain size analyses and liquid and plastic limits. The laboratory testing was conducted in <br />general accordance with applicable ASTM and AASHTO specifications. <br />(970) 879.7888 • Fex (970) 879-7891 <br />29585 U.S. 40 West, Box 775226 • Steamboat Springs, CO 80477 r-~ a~ <br />