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P. O. Box 1488 . Paonia, CO 81428.970-527-4135 . Fax 970-527-2234 <br />March 9, 2004 <br />Mr. Joe Dudash <br />Envvonme;nta Protection Specialist <br />Division of Minerals and Geology <br />Department of Natural Resources <br />1313 Sherman St, Room 215 <br />Denver, Colorado 80203 <br />SUBJECT: Design Parameter for Rock Block Size, Rock Fall Berm Design, <br />for Bowie Resources, LLC, <br />Deaz Mr. Dudash: <br />I have reviewed the data currently available for the Bowie Mine site regazding rock block size. The specific data <br />include: <br />• Observations and joint survey data along the outcrops above [he mine facilities <br />• Observations of existing rock fall debris around the mine site <br />• Results of excavations in and azound the mine site during the past 12 months <br />Based on these data and observations, I recommend a rock size of 5 R by 5 ft by 5 ft as the rock block design <br />parameter for the proposed rock fall berm at the Bowie Mine Site. <br />The enclosed six items,summarize the observations and data I used to arrive at this recommendation. <br /> <br />~a~o Y <br />Coloradot~t~essionai Engineer Number 16488 <br />BS, Geological Engineering <br />MS, Mining Engineering (Rock Mechanics) <br />Manager, Technical Services <br />Voice: 970.929.5367 <br />FAX: 970.929.2234 <br />Email: cstewartt7bowieresources.com <br />Enclosures: 6 as noted <br />cc: with enclosure: Jim Stover <br />Roger Pihl <br />u <br />/nR-3 y <br />On The Cutting Edge of Customer Service APPKOUED 3~-4~~ y <br />"THE VERY BEST' <br />