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Main Administration Buildin¢: <br />Ground water levels measured at piezometer 98-03B during the 2nd quarter 2006 show an increase <br />to within 29 feet of the ground surface. This is a couple of feet higher than the ground water level <br />measured this time last yeaz. The ground water levels at this location have been increasing at this <br />location steadily (by a total of 9 feet) since 2002. <br />In addition, the ground water level measured at piezometer 98-23 during the 2°d quarter 2006 has <br />shown a significant increase since August 2005 (by 5 feet) and is continuing to rise post the spring <br />thaw. <br />The increase in ground water levels at this location is particularly of concern as a result of <br />movement experienced by the crane in the wazehouse towards the end of 2005. In addition, this is <br />the azea where a new pazlang lot has been proposed to be installed. This was not stabilized by piles <br />at the toe of the main landslide during 1998 and is therefore susceptible to significant landslide <br />activity when the colluvium becomes saturated. It is recommended that the horizontal drainage <br />wells located south of this azea be cleaned out with a high pressure hose to ensure that debris is not <br />restricting their drainage capacity. <br />Al] other piezometers measured at the Main Mine Site do not show ground water levels that are <br />unexpected based on historical seasonal data. <br />Barr Engineering Company 2n° Quarter 2006 <br />' 06/2&03'1 Geotechnical Monitoring <br />