Laserfiche WebLink
Mr. Roy Kam <br />Sextca Coa! Compaxy <br />January 12, 2008 <br />Page 2 <br />• <br />The embankments have been constructed from spoil material produced during mining. This <br />material was placed in controlled lifts and compacted. Based on this fact, observations of the on- <br />site spoil piles, and typical strength values for spoil material, the following strength properties were <br />assigned to the embankment. <br />• Spoil: ~ = 38°, cohesion = 0 psi <br />• Unit Weight: 120 pcf <br />Conclusions and Recommendations <br />Based on the above stated assumptions, safety factor of 1.56 was calculated by the limit <br />equilibrium analysis. Rule 4.05.9(8)(b) states that the stockponds require a safety factor of 1.3. <br />Therefore, these structures should perform adequately during the life of mine. Tn addition, there <br />are no downstream hazards of these stock ponds; therefore, if a failure did occur, there is minimal <br />risk to life and property. <br />We appreciate this opportunity to work once again with SCC. Please contact the undersigned if <br />you have any questions about this report. <br />Sincerely, <br />N11~1f-I <br />-~a/Qi~. <br />John Pellicer, P.E. <br />Principal <br />Attachments <br />cc: Jay James <br />e~ <br />