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Spoil Fill #9 <br />March 29, 2006 <br />Page 2 <br />FILL PLACEMENT <br />CDMG regulations require that spoil be "placed in horizontal lifts in a controlled manner, concurrently <br />compacted as necessary to ensure mass stability". Maximum lift thicknesses are not specified. As indicated <br />by previous inspection reports, lifts were placed in accordance with plans specified by the CTL Thompson <br />report. Spoil material was transported to the fill area using a combination of tracks and dozers. Lift <br />thicknesses of up to 50 feet were placed within the area removed from the fill face by more than 50 feet. <br />Fill placement terminated by second quarter 2002. <br />No fill placemem occurred during this quarter, nor is firtrue placemem anticipated. <br />COVER MATERIAL <br />As documented by previous inspection reports, cover placement, seeding and mulching was completed <br />during the second quarter 2002 and upper areas during the second quarter of 2004. <br />During the second quarter of 2005, areas disturbed by maintenance of the armored down-drains were hand <br />seeded using certified weed frce straw and the approved rangeland seed mix. <br />STRUCURAL IN'I'EGRTfY <br />The entire excess spoil fill facility was examined for signs of failure and instability such as tension cracks, <br />ground movemem, springs and seeps, and standing water. No indication of potential instability was <br />observed. <br />DOCUMENTATION AND OTHER OBSERVATIONS - <br />No significant erosion was noted with established drainages functioning as designed. Limited early season <br />vegetation has been heavily grazed by eilc <br />CERTIFICATION <br />This inspection was conducted by Ronald G. Thompson, a qualified professional and MSFiA certified <br />inspector of earth and rock-fill embanl®ents and impoundments, render the direction of Mr. Charles <br />McGlothlin, a registered professional engineer licensed in the State of Colorado. <br />This is to certify, to the best of my knowledge and belief; tlnu Fill No. 9 construction and placement, as <br />noted since the previous ceRification and as determined during this inspection and discussions with mine <br />personnel, is in accordance with designs as proposed by CTL Thompson in their repoR dated April 27 and <br />amended July 27, 2001 and as approved by the Division of Minerals and Geology. <br />~~~ <br />Ronald G. Thompson <br />Inspector <br />Charles cGlothlin ' ~ '' ~` <br />PfnfPS510na1 Engmee[ ' t r`,~' ~ ~ ~ u~ - " ~. <br />c_ <br />r' . ~.. <br />