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Spoil Fill #9 <br />June 12, 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 tnrcks and dozers. Lift <br />thicknesses of up to 50 feet were placed within the area removed from ffie fill face by more Bran 50 feet. <br />Fill placement temrinated by second quarter 2002. <br />No fill placement occurred during this quarter, nor is future placement anticipated. <br />COVER MATERIAL <br />As documented by previous inspection reports, cover phusmen; seeding and mulching was completed <br />during the second quarter 2002 and upper areas during the second quarter of 2004. During the sewnd <br />quarter of 2005, areas disturbed by maintenance of the armored down-drains were hand seeded using <br />certified weed free straw and the approved rangeland seed mix. <br />STRUCURALINTEGRITY <br />The entire excess spoil fill facility was examined for signs of failure and instability such as tension cracks, <br />ground movement 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 fimctioning as designed. Limited <br />precipitation since fall of 2005 has left ffie area extremely dry with most vegetation remaining dormant. <br />CERTIFICATION <br />This inspection was conducted by Ronald G. Thompson, a qualified professional and MSHA certified <br />inspector of earth and rock-fill embanlmnents and impoundments, order 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 that Fill No_ 9 construction and placement as <br />noted since the previous certificazion and as determined during this inspection and discussions with mine <br />personnel, is in accordance with designs as proposed by CTL Thompson in ffiev report dated April 27 and <br />amended July 27, 2001 and as approved by the Division of Minerals and Geology. <br />~~ ~l ~~ <br />Ronald G. Thompson <br />Inspector <br />Charles VJ. McGloffili <br />Professional Engineer <br />r1 <br />L_J <br />L.I <br />,,:: <br />,,i~ <br />{.- o _ " i` <br />.._,e <br />.- -~ ,i: • <br />. 'tom <br />