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INSPECTION OF EXCESS SPOIL FILL <br />First Quarter 2015 Certification <br />Fill Area No. 7 <br />Date: March 24, 2015 <br />Page: 2 of 2 <br />FILL PLACEMENT <br />CDMG regulations require that spoil be'placed in horizontal lifts in a controlled manner, concurrently compacted <br />and necessary to ensure mass stability'. Maximum lift thicknesses are not specified. As indicated by previous <br />inspection reports, lifts were placed in accordance with plans specified by CTL Thompson. Spoil material was <br />transported to the fill area using a combination of trucks and dozers. Left thicknesses of up to 50' were placed <br />within the area removed from the fill face by more than 50 ft. thinner lifts of 6-8 ft. with leveling and compactive <br />effort supplied by dozers and trucks was utilized as fill placement advances to within fifty feet of the slope face. No <br />fill placement occurred during this quarter. <br />COVER MATERIAL <br />As documented by previous inspection reports, cover placement seeding and mulching occurred during the second <br />quarter of 2002. During the first quarter of 2004 additional topsoil was transported to the upper -most portion of <br />the fill area lying between the area seeded in 2002 and the lateral ditch placed at the upper perimeter of fill 7. The <br />northeast portion of this area, approximately 1.60 acres, was final graded and seeded in August of 2006. <br />STRUCTURAL INTEGRITY <br />The entire excess spoil fill facility was examined for signs of failure and instability such as tension cracks, ground <br />movement, springs and seeps, and standing water. There was no indication of potential instability or signs of <br />failure at the time of inspection. <br />DOCUMENTATION AND OTHER OBSERVATIONS <br />Early spring conditions exist. Green vegetation starting to grow on the entire fill sight. Weather is mild at the time <br />of the inspection. <br />CERTIFICATION <br />Inspection was conducted by Vince Massarotti, a qualified professional and MSHA certified inspector of earth and <br />rock -fill embankments and impoundments, under the direction of Mr. Charles McGlothin, a Registered <br />Professional Engineer Licensed in the State of Colorado. <br />This is to certify, to the best of my knowledge and belief, that Fill #7 construction and placement, as noted since <br />the previous certification and as determined during this inspection and by discussions with mine personnel, is in <br />accordance with designs as proposed by CTL Thompson in their report dated April 27 and amended July 27, 2001 <br />and as approved by the Division of Minerals and Geology. <br />r� <br />Yy /.Gtit <br />Vince Massarotti harles cGlothlin <br />Inspector Professional Engineer <br />Inspections completed in compliance with Rule 4.09.1111)(b) must be submitted to the Division within two weeks of Completion <br />