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Rio Tinto Energy America <br />At1:n: Mr. Tay Tonozzi <br />November 21, 2008 <br />Page 3 <br />Sf-1r~f~1CIP~! F~VViL~ON, 6~11G. <br />CLOSURE <br />Our services were provided in accordance with our Master Se>vice Agreement, M366. The <br />opinions and recormnendations presented in this report were prepared in accordance with <br />generally accepted professional geotechnical engineering principles and practice in tlus area at <br />the time we prepared this report. We make no other warranty, either express or implied. <br />If you have any questions or require further information, please contact me at 303-825-3800. <br />Sincerely, <br />SHANNON & WILSON, INC. <br />~~;/ <br />Mark G. Gray, P.E. <br />Senior Associate <br />MGG: GRF/mgg <br />Reviewed by: <br />Gr gory ischer, P. E. <br />Semor 'ice President <br />Enclosure: <br />Figure 5 -Seeps/Springs Locations and Drain Recommendations (Revised November 2008) <br />?3-t-01105-200 Addendum No 2 1121 OB.doc <br />Exh. 21, Item 1 <br />Second Intro. Letter - 3 <br />23-1-01105-200 <br />Revision Date: 11/22/08 <br />Revision No.: TR-77 <br />