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Stable since 1997, piezometer 97-49 is showing a significant increase in the Bound water level <br />measured during the 2nd quarter 2006. Existing Bound water levels at this location are 9 feet higher <br />than those measured this time last yeaz (or for the past 8 years) and the Bound water is now within <br />1 S feet of the Bound surface. <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 area will <br />be reviewed during the 2006 structural review and the requirements (if any) for remedial action to <br />mitigate the high Bound water levels will be evaluated. <br />All other piezometers measured at Sylvester Gulch do not show Bound water levels that aze <br />unexpected based on historical seasonal data. <br />Barr Engineering Company 2n0 Quarter 2006 <br />06126-03~ Geolechnipl Monitoring <br />