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~ ,~ <br />Spoil Fill #9 <br />September 27, 2005 <br />Page 2 <br />FH.L PLACEMENT <br />CDMG regulations requne that spoil be "placed in horizontal Iifts in a controlled mamrer, concurrently <br />compacted as necessary to ensure mass stability". Maximum lift thiclmesses are not specified. As indipted <br />by previous inspection reports, lifts were placed in accordance with plans specified by the CTL Thompson <br />report. Spoi] material was transported to the fill area using a combination of trucks and dozers. Lift <br />tbicknesses of up to 50 feet were placed within the area removed from the Sll face by more than 50 feet. <br />Fill placement terminated by second quarter 2002. <br />No fill placement occurred during this quarter, nor is future placement a~cipated. <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 band <br />seeded using terrified weed free straw and the approved rangeland seed mix. <br />STRUCURALINTEGRITY <br />The entire excess spoil fill facility was examined for signs of failrue and instability suds as tension cracks, <br />ground movement, springs and seeps, and standing water. No indication ofpotential instability was <br />observed. <br />DOCUMENTATION AND OTHER OBSERVATIONS <br />No significant erosion was noted wilt established drainages functioning as desigped. <br />CERTIFICATION <br />This inspection was conducted by Ronald G. Thompson, a qualified professional and MSI-IA certified <br />inspector of earth and rock-fill embanl®wts and inrpoundments, under the direction of Mr. Charles <br />McGlothlin, a registered professioml engineer licensed in the State of Colorado. <br />This is to certify, to the best of my knowledge and belief; that Fill No. 9 construction and placement, as <br />noted since the previous certification and as determined during this inspection and discussions with mine <br />personnel, is in accordance wilt designs as proposed by CTZ Thompson in their report dated AprD 27 and <br />amended July 27, 2001 and as approved by the Division of Minerals and Geology. <br />4 -~r- <br />Ronald G. Thompson Charles W. eGlothtin " ~ ~"~', ~~kcGt ! <br />Inspector Professional Engineer - _.. <br />~ae~: <br />• ~ ~~= . <br />b~cSCU~ /~' <br />