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<br />Santa Maria Reservoir. my <br />October 28, 1993 <br />Page. 5 <br /> <br />. <br /> <br />These borings will be monitored as pan of a close surveillance monitoring program <br />through one reservoir filling cycle. <br /> <br />Following installation of the borings an embankment stability analysis will be <br />performed using the soil parameters and water levels obtained from the drilling. The <br />embankment permeability data will be used to perform a seepage analysis on the <br />embankment. These analyses will guide t/le repair work to ensure an effective factor of <br />safety is attained during any modifications once the sources of seepage and the level of <br />stability iulve been determined, we will explore several options for improving the dam <br />condition. <br /> <br />Phase I Continental Dam Study <br />Exploration Drilling, Seepage and Stability Analyses <br />Drilling, 5 holes 465 feet $23,000.00 <br /> <br />Geologist, logging and testing 13,500.00 <br /> <br />Report preparation (Stability Analysis 12.000.00 <br />Seepage Analysis, Summary Report & Recommendations) <br />Estimated Total $48,500.00 <br /> <br />We recommend a drilling contractor's estimate prior to drilling. <br /> <br />It is a pleasure to be of service to YOlL If you have any questions please call our <br />office at (206) 882.2455. <br /> <br />v cry truly yours, <br />Harza Northwest. Inc. <br /> <br />L~ <br />~ .P~ielefeld, CEG <br />Principal Engineering Geologist <br /> <br />cc: William Paddock <br /> <br />RJBIkk <br /> <br />Page 9 of 15 <br />