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Spoil Fill #9 <br />September 21, 2007 <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 W 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 trucks 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 placement ocxumed during this quarter, nor is future placement anticipated. <br />COVER MATERIAL <br />As documented by previous inspcetion reports, cover placement, seeding and mulching was completed <br />during the second quarter 2002 and upper areas during the second quarter of 2004. During the second <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 />STRUCURAL IlVTEGRITY <br />The entire excess spoil fill facility was examined for signs of faihue and instab~7ity 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 />Late summer conditions prevail with good vegetative cover established, lrlcely due to the southern aspect of <br />this fill area and ample precipitation during spring and early s~mnmer. <br />CERTIFICATION <br />This inspection was conducted by Ronald G. Thompson, a qualified professional and MSHA certified <br />inspector of earth and rock fill embanlnnents and impoundments, under the direction of Mr. Charles <br />McGlothlin, a registe~r+ed professional engineer licensed in the State of Colorado. <br />This is to certify, in the best of my knowledge and belied that Fill No. 9 construction and placement, as <br />noted since the previous ceatification and as wed during this inspection and discussions with mine <br />personnel, is in accordance with designs as proposed by CTL Thompson in their mport dated April 27 and <br />amended July 27, 2001 and as approved by the Division of Minerals and Geology. <br />} r '~~ ; <br />~. y`~. <br />Ronald G. Thompson <br />Inspector <br />l <br />__ - <br />es . McGlo ~ ~~ - <br />Pmfessional Engineer - ~-' - - _ <br />