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Geotechnical Evaluation of Mine-Induced Seismicity on Monument Dam <br />Dorsey 6 Whitney, LLP <br />• <br />1.3 Scope of Work <br />GEI performed the following scope of work for this project: <br />1. Collected and evaluated available documents related to the dam and literature related <br />to mine-induced seismicity from MCC and SEO files. <br /> <br />• <br />2. Estimated possible ground motions at the project site induced by proposed mining <br />operations. <br />3. Estimated material properties for use in engineering analyses. <br />4. Performed stability analysis of the dam and landslide. <br />5. Evaluated potential seismic accelerations at the site. <br />6. Based on the analysis performed, developed a professional opinion regarding the <br />potential impact ofmine-induced ground motions on the safety of the dam and <br />reservoir. <br />7. Identify and analyze solutions to prevent impacts from mining-induced seismicity. <br />8. Prepared this Report. <br />1.4 Project Personnel <br />The following personnel from GEI are responsible for the work summarized herein: <br />Project Manager <br />Project Engineer <br />Project Geologist <br />Senior Technical Review <br />Stephen G. Brown, P.E. <br />Christopher L. Jones, P.E. <br />James E. Wright, P.G. <br />Gonzalo Castro, Ph.D. <br />Mr. Phil Schmidt and Mr. Henry Barbe of MCC, Mr. Wendell Koontz of Ark Land <br />Company, and Mr. Chris Hansen of Arch Western Bituminous Group provided assistance <br />and information during the project. <br />GEI. <br />2 <br />060)50 06-03-I6 Movwnmt Dun GmtecMiul EvJ <br />March 2666 <br />