Laserfiche WebLink
West Pit Fill Inspection Certification <br />On February 23, 2006 and again on March 8, 2006, I inspected the area in which the West Pit <br />Excess Spoil Fill is being constructed. The purpose of this inspection was to observe the surface <br />rock drain that borders the 3H:1V Excess Fill Slope, inspect the areas dumped to final grade <br />below the 7,400 dump elevation, inspect the revegetation on the fill surface, inspect the fill for <br />areas of water seepage or surface drainage, inspect the final grade slopes below the 7,300 <br />elevation of the Excess Fill Slope, and satisfy the requirements of CDMG Rule 4.09.10 (1a) and <br />Rule 4.09.1 (1 Ib). <br />During the inspection, it was observed that the condition of the fill was good and that no seeps or <br />springs were noted. The collection ditches at the 6,950, 7,050, and 7,150 elevations all were in <br />relatively good shape. The ditch at the 7,250 elevation needs to be completed to the west end of <br />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 0.1 feet of movement) with the <br />most movement noted in the 7150 West monument (0.14 feet). Based on these data, the total <br />displacement of the monuments is not of concern with regard to the stability of the dump. There <br />was also no evidence of structural weakness or other hazardous conditions associated with this <br />dump. These monument survey data are available for review upon request at the Colowyo Mine <br />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 Colowyo <br />operation and the coal program permitting process in Colorado, the construction activities related <br />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 I b and other applicable <br />requirements of the approved permit documents, a portion of CDMG Permit C-81-019. <br />,~~~o~PpO 1 l ~F ~i~„~ <br />,...... y <br />o : G. PElf,P ~'ro <br />U • '~' <br />32257 z ; a <br />3/8/0 6 <br />xc: Mr. Kurtis Blunt, Colowyo Coal Company, L. P. <br />cf 17.15.1 2005 <br />