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Fill 7 <br />March 29, 2006 <br />Page 2 <br />FILL PLACEMENT <br />CDMG regulations require that spoil be "placed in horizontal -ifts 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 CTL Thompson. <br />Spoil material was transported to the fill area using a combination of trucks and dozers. Left thicknesses of <br />up W 50' were placed within the area removed from the fill face by more than 50 ft. Thinner lifts of 6-8 ft. <br />with leveling and compactive effort supplied by dozers and trucks was utilized as fill placement advances to <br />within fifty feet of the slope face. No fill placement occurmd during this quarter. <br />COVER MATERIAL <br />As dacumenoed by previous inspection reports, cover placement, seeding and mulching occurred during the <br />second quarter 2002. Outing the fast quarter 2004 topsoil was transported to the upper-most portion of the <br />fill area lying between fire area seeded in 2002 and the lateral ditch placed at the upper perimeter of fill 7. <br />STRUCTURAL IIVTEGRITY <br />The emus 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 OTAER OBSERVATIONS <br />No significant erosion was noted. Established drainages appear to be functioning as designed <br />CERTIFICATION <br />Inspection was conducted by Ronald G. Thompson, a qualified professional and MSHA certified inspector <br />of earth and rock-fill embaal~ents and impoundments, tinder the direction of Mr. Charles McGlothlin, a <br />registered professional engineer licensed in the State of Colorado. <br />This is to certify, to the best of my knowledge and belied that Fill No. 7 construction and placement, as <br />rated since the previous certiSca<ion and as determined during this inspection and by discussions with mine <br />personnel, is in accordance with designs as proposed by CTL Thompson in their report dated April 27 and <br />amended Itrly 27, 2001 and as approved by the ITivision of Minerals and Geology. <br />dr^tt/41'~~ <br />Ronald G. Thompson <br />Inspector <br />Charles W. McGlothli <br />Professional Engineer <br />.' ~ ~, <br />,' . `,' <br />_~ ,...- <br />~~ •=: <br />~~`• : ~, <br />> ,S; l; <br />~, <br />r <br />