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Sylvester Gulch <br />' Between F-Wall and East Fork and F-Wall: <br />The high Bound water levels measured at this location coupled with the displacement of the F-Wall <br />recorded last yeaz during the annual structural review are a concern. It is recommended that the <br />' Bound water levels in each of these piezometers be measured in subsequent months. The integrity <br />of the F-Wall will also be checked during the annual structural review for 2006, and if additional <br />displacement and degadarion is found (since that noted in 2005) it is suggested that remedial action <br />be undertaken. <br />' Tn addition, movement of up to 0.25 inches was been recorded by I-9B down to a depth of 35 feet <br />during the 1~` quarter 2006. This inclinometer will be read during the 3'~ quarter to track this <br />displacement. <br />Road to Sylvester Gulch: <br />The general increasing trends of the Bound water along the access road to Sylvester Gulch are a <br />' concern. It has been shown that instability at the main mine site is correlated to increasing Bound <br />water levels in the colluvium. It is a concern that is Bound water levels continue to increase along <br />' this access road as instabilities may occur that will restrict access and possibly damage <br />infrastructure located along the alignment if a landslide is triggered. The stability of this azea will <br />be reviewed during the 2006 structural review and the requirements (if any) for remedial action to <br />t mitigate the high Bound water levels will be evaluated. <br />Other: <br />' Based on the surface mirror data that is showing increasing displacements, the stability of each of <br />these areas will be checked during the 2006 on site structural review and recommendations will be <br />' made with respect to remedial measures (if any) that aze required to ensure stability. <br />• 46 kV Transmission Line <br />• Steel Pole Transmission Towers <br />• Electric Borehole Power Line <br />' East Central Flank of Substation Slide -Outside Scaro: <br />A field inspection of this azea will be undertaken during the annual review and the inclinometer <br />showing movement will be monitored during the 3'a quarter 2006 to track ongoing displacement <br />' and determine if remedial activities will be required. <br />Sylvester Gulch Substation: <br />' A number of stabilization alternatives have been proposed to MCC for this location. They are still <br />under review by mine site personnel. <br />Barr Engineering Company 2n° Quarter 2006 <br />' 06/26-031 Geotechnical Monitoring <br />