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Sylvester Gulch Surface Mirrors <br />46 kV Transmission Line: <br />Mirror #8 is showing an increasing rate of displacement during the 2"d quarter 2006. The total <br />displacement of this mirror is approximately 3 feet since 1997. The existing rate of movement of <br />this mirror is approximately 0.5 feet/yeaz. This amount of movement is a concern. <br />Steel Pole Transmission Towers: <br />Mirror #39 is showing an increasing rate of displacement during the 2nd quarter 2006. The total <br />displacement of this mirror is approximately 1 foot since 1998. The existing rate of movement of <br />this mirror is approximately 0.25 feeUyeaz. <br />Electric Borehole Power Line: <br />Minor #48 is showing an increasing rate of displacement during the 2°d quarter 2006. The total <br />displacement of this mirror is approximately 0.25 feet since 1998. The existing rate of movement <br />of this minor is approximately 0.15 feedyeaz. <br />F-Wall: <br />Mirror #15 showed significant movement during 2005. During the 1~` and 2na quarters 2006, this <br />minor was not monitored. It is recommended that this mirror be added to the 3'd and 4`" quarter <br />surface monitoring program. <br />The stability of each of these azeas discussed above will be checked during the 2006 on site <br />structural review and recommendations will be made with respect to remedial measures (if any) that <br />aze required to ensure stability. <br />Lone Pine Mirrors <br />No minor data is available for the Lone Pine azea during the h' Quarter 2006. <br />Refuse Pile Slope Mirrors <br />No mirror data is available for the Lone Pine azea during the 1" Quarter 2006. <br />SB Mirrors <br />No minor data is available for the SB azea during the 1~` Quarter 2006. <br />Barr Engineering Company 2n° Quarter 2006 <br />06/26-031 Geotechnical Monitoring <br />