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Knight Resold <br />C O N S U L T I N G <br />Mr. Jason Musick <br />Environmental Protection Specialist <br />December 10, 2008 <br />provide a discussion verifying that the long term static safety factor for the Horse <br />Gulch and K Area Buttress fills will be 1.5. <br />Response: Factor of Safety calculations are provided in Section 3.0 of the certified <br />AAI reports entitled K-Pit Buttress Fill Stability Analysis. <br />Knight Pi6sold believes that the information provided above should address all of the DRMS <br />completeness issues mentioned in the Division's letter of February 15, 2008. Trapper will <br />respond quickly to any future technical adequacy concerns, should they exist. It is in everyone's <br />best interest to expedite this permit approval process. <br />If you have any questions or need additional information, please contact me; or Jim Mattern or <br />Forrest Luke at Trapper Mine. <br />Sincerely, <br />Knight Pi6sold and Co. <br />A?W <br />Barbara A. Filas, P.E. <br />President <br />FVL [M/Permit Revisions/PR-6 Completeness Response Cover Letter.doc] <br />cc: Jason Musick - two copies w/ attachments <br />File 109.2.3.4 w/o attachments <br />Revisions File <br />DV102.00302.01 5 <br />PR-6 Completeness Response l_tr