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<br />Fill 7 <br />September 30, 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 iospection reports, lifts were placed in accordance with phurs specified by CTL Thompson. <br />Spoil material was transported to the fill area using a combination of trucks and dozers. Left thiclmesses of <br />up to 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 supp-ied by dozers and trucks was utilized as fill placement advances to <br />within fifty feet of the slope face. No fill phacement occurred during this guarter. <br />COVER MATERIAL <br />As documemed by previous inspection reports, cover placement, seeding and mulching oceurred during the <br />second quarter 2002. During the fast quarter 2004 additional topsoil was transported m the upper-mgt <br />portion of the fill area lying between the area seeded in 2002 and the lateral ditch placed a< the upper <br />perimeter of fi117. The northeast portion of this area, approximately 1.60 acres, was final graded and <br />seeded in August of 2006. <br />STRUCTURAL INTEGRI'I'P <br />The entire excess spoil fill facility was examined for signs of feihae and instabiity 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. Established drainages appear to be fimctioning as designed. Some <br />movement ofrip-rap in the east down drain was observed. These conditions should be addressed while <br />equipment is on-site after completing seeding of the remaining unseeded disturbed areas of the mine. <br />CERTIFICATION <br />Inspection was conducted by Ronald G. Thompson, a qualified professional and MSIIA certified "inspector <br />of earth and rock-fill embanl®ents arrd impoundments, under the direction of Mr. Charles McGlothlin, a <br />registered professional engineer licensed in the State of Colorado. <br />'T'his is to certify, ro the best of my Imowledge and beGet; that Fill No. 7 construction and placement, as <br />noted since the previous certification 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 Apri127 and <br />amended July 27, 2001 and as approved by the Division of Minerals and Geology. <br />Ronald G. Thompson <br />Inspector <br />~_ <br />~_ .. - - <br />~9" <br />~d 9;nm 5~s. ~~ <br />` ? _i ~ia n <br />