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-2- <br />PURPOSE AND SCOPE OF STUDY <br />• This report presents tl'~e results of a subsurface study for <br />design of foundations and general grading at the New Castle <br />Energy Corporation Ptine site, about two miles east oC New Castle <br />in Garfield County, Colorado. A prading plan of the proposed <br />development as provided by Schmues?r & Associates, Inc., is shown <br />on Fig. 1. Chen and Associates, Inc., previously conducted a <br />preliminary geotechnical investigation for proposed surface mine <br />facilities in the same general area as the current study which <br />included field mapping of the surface geologic conditions and <br />exploratory boring drilling. The report was submitted to Dravo <br />Corporation dated November 10, 1983> Job No. 25,999• The find- <br />ings of the previous report have been used to supplement this <br />• report where deemed appropriate. <br />A field exploration program consisting of exploratory borings <br />was conducted to obtain information on subsurface conditions. <br />Samples obtained during the field exploration were tested in the <br />laboratory to determine the classification and engineering char- <br />acteristics of the on-site soils. The results of the field <br />exploration and laboratory testing were analyzed to develop <br />recommendations for Foundation ty}:e s, depths and allowable pres- <br />sures in the dewatering building and thickener site. The data <br />was also analyzed to provide general comments regarding grading <br />and surface drainage. The results of the field exploration and <br />the laboratory testing program are presented herein. <br />This report has been prepared to summarize the data obtained <br />. during this study and to present our conclusions and recommenda- <br />Chen &r\ssociates <br />