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r <br />West Pit Fill Insaection Certification <br />On June 22, 2006, I inspected the area in which the West Pit Excess Spoil Fill is being <br />constructed. The purpose of this inspection was to observe the surface rock drain that borders <br />the 3H:1V Excess Fill Slope, inspect the areas dumped to final grade below the 7,400 dump <br />elevation, inspect the revegetation on the fill surface, inspect the fill for areas of water seepage <br />or surface drainage, inspect the final grade slopes below the 7,300 elevation of the Excess Fill <br />Slope, and satisfy the requirements of CDMG Rule 4.09.10 (1a) and Rule 4.09.1 (1 b). <br />During the inspection, it was observed that the condition of the fill was good and that no seeps <br />or springs were noted. The collection ditches at the 6,950, 7,050, and 7,150 elevations all were <br />in relatively good shape. The ditch at the 7,250 elevation needs to be completed to the west end <br />of the fill. No water was evident in the surface drain or underdrains. <br />In addition, I reviewed the monument survey data. These data indicate that the elevations of <br />most of the monuments have not significantly changed (less than 0.04 feet of movement) with <br />the most movement noted in the 7050 West monument (0.04 feet). Based on these data, the <br />total displacement of the monuments is not of concern with regard to the stability of the dump. <br />There was also no evidence of structural weakness or other hazardous conditions associated <br />with this dump. These monument survey data are available for review upon request at the <br />Colowyo Mine site. <br />I am a Registered Professional Engineer in the State of Colorado and a representative of <br />Environmental Solutions, Inc, P. O. Box 522, Gillette, Wyoming. Being familiar with the <br />Colowyo operation and the coal program permitting process in Colorado, the construction <br />activities related to the West Pit Excess Spoil Fill are in conformance, to the best of my <br />knowledge and experience, as specified in pages I a-2 through I a-4, Exhibit 19 I b and other <br />applicable requirements of the approved permit documents, a portion of CDMG Permit C-81- <br />019. _........._ <br />`~O`' Pp0 l ! C '~Ii~i <br />~ ,...... Fy ; <br />~ ~ C. PFt J'F` <br />~ S~ 32257 =~ ~ <br />'o~ .•.. <br />. G~~~d•; <br />~~fgsS~ONAI rY~A~~~~ <br />G/~/o 6 <br />xc: Mr. Kurtis Blunt, Colowyo Coal Company, L.P. <br />cf 17.15.1 2005 <br />cf 24.20 (West Pit) <br />