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Spoil Fill #9 <br />December 3, 2007 <br />Page 2 <br />FII.L PLACEMENT <br />CDMG regulations require that spoil be `laced in horizontal lifts in a controlled manner, concurrently <br />compacted as necessary to ensure mass stabilit}~'. 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 SO feet. <br />Fill placement terminated by second quarter 2002. <br />No fill placement occurned during this quarter, nor is futtue placemen 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. During the second <br />quarter of 2005, areas disturbed by maintenance of the armored dowm-drains were hand seeded using <br />certified weed flee straw and the approved rangeland seed mix. <br />STRUCURAL INTEGRITY <br />The e~ire excess spoil fill facility was examined for signs of failure and instability such as tension cracks, <br />ground movemerrt, springs and seeps, and standing water. No indication of poterrtial instability was <br />observed. <br />DOCUMENTATION AND OTHER OBSERVATIONS <br />Late fall conditions prevail with good vegetative cover in evidence, likely due to the southern aspect of this <br />fill area and ample precipitation during spring and early simamer. No conditions requiring maintenance <br />were observed. <br />CERTIFICATION <br />This inspection was conducted by Ronald G. Thompson, a qualified professional and MSHA certified <br />inspector of earth and rock-fill embankments and impoundments, under 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 j 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 with designs as Proposed by CTL Thompson in their report dated Apri127 and <br />amended July 27, 2001 and as approved by the :Division of Minerals and Geology. . <br />R~onr. Thompson 1 ~~~~~ <br />