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FLSmidth Salt Lake City Inc. <br />7158 S. FLSmidth Drive • Midvale, UT 84047 • USA <br />Tel +1 801 233 5600 • Fax +1 801 233 5601 <br />www.flsmidth.com <br />DATE: May 16, 2012 <br />ATTN: Mr. Ron Roberts <br />Cripple Creek and Victor Gold Mining Co. <br />P.O. Box 191 <br />Victor, CO 80860 <br />SUBJECT: Mill Foundation/ Liner Analysis <br />Dear Ron, <br />[135MIDTH <br />pt— /960— 2 i ,4fr1 /0 <br />Ed Summers of FLSmidth has done the analysis for the Ball and Rod Mill <br />foundations as part of the High Grade Ore Project for Cripple Creek and Victor Gold <br />Mining Inc. The entire site is protected from contamination using a geotextile liner <br />and there have been some concerns about the loading that the mills will impose <br />onto this liner. <br />The liner elevation at the location of the Mills is approximately 9886' -0, while the <br />bottom of the mat foundation is at elevation 9906' -0. This provides approximately <br />20' -0 of cover for the liner. <br />I have analyzed the vibration of the Mill foundation using the software package <br />Dyna 6.0, which analyzes foundations for dynamic loading. Using this software, <br />with the soil properties as given by AMEC and the foundation as currently designed, <br />I have determined the system stiffness and damping values. The result of this <br />analysis is that the vibration of the mill will be completely dampened before it <br />reaches the liner. <br />Both of the mills are supported from a 4' -0 thick mat. The maximum bearing <br />pressure on the mat is less than 4000 psf, while the average soil bearing pressure <br />on the mat is 2000 psf. These values are much less than that given by AMEC as <br />the allowable soil pressure for this site. <br />The design and analysis of the liner has been done by AMEC and is not part of <br />FLSmidth scope. However, it is our opinion that the loading imposed on the liner is <br />within an acceptable level to prevent liner failure. <br />Sincerely, <br />Ed Summers, P.E. <br />0 0111 1111111/ OOOOO <br />G <br />1/1 <br />