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West Pit Fill Inspection Certification <br />On March 31, 2011, 1 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 the <br />3H:1V Excess Fill Slope, inspect the areas dumped to final grade below the 7,400 dump elevation, <br />inspect the revegetation on the fill surface, inspect the fill for areas of water seepage or surface <br />drainage, inspect the final grade slopes below the 7,300 elevation of the Excess Fill Slope, and <br />satisfy the requirements of CDMG Rule 4.09. 10 (1a) and Rule 4.09.1 (1 b). <br />During the inspection, most of the fill was obscured by a recent snowfall although both the top of fill, <br />the toe of the fill and portions of the rock drain were observed. No changes were noted. The <br />observable portions of the fill appeared unchanged and stable. Typically, a small flow of about two <br />gallons per minute is evident from the toe of the underdrain. No evidence of this or any other flow <br />was identified during this inspection, although snow obscured portions of the toe. No erosion <br />problems were noted. <br />Due to adverse snow conditions, no monument surrey data was collected during this quarter. The <br />historic monument survey data are available for review upon request at the Colowyo Mine site. <br />Similarly, the fill monitoring well was not accessible and no reading was obtained. <br />I am a Licensed Professional Engineer in the State of Colorado and a representative of <br />Environmental Solutions, Inc, P. O. Box 2996, Cheyenne, Wyoming. Being familiar with the <br />Colowyo operation and the coal program permitting process in Colorado, the construction activities <br />related to the West Pit Excess Spoil Fill are in conformance, to the best of my knowledge and <br />experience, as specified in pages I a-2 through I a-4, Exhibit 19 1 b and other applicable <br />requirements of the approved permit documents, a portion of CDMG Permit C-81-019. <br />g%''- p0 <br />` L ?C r*,?i <br />.,......• <br />off <br />'1011 <br />Fy ' <br />C <br />N <br />•' <br />o <br />% <br />. <br />/ <br />•. <br />g fj <br />• <br />? <br />G . <br />32257 <br />4-l <br />o ? <br />: <br />41ti t t <br />- DA)r- <br />xc: Mr. Kurtis Blunt <br />cf 17.15. <br />cf 24.20 (West Pit)