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INSPECTION REPORT <br />Site: National King Coal Mine, Hesperus, Colorado <br />Inspected By: Don R. May, P.E., Project Engineer <br />Inspection Date: Quarterly Inspection September , 2007 <br />Ponds: Photograph 1 shows the west pond. Both ponds appear to operating properly. <br />The inlets, outlets and embankments of both ponds were inspected and appear in good <br />condition. Both ponds should be checked for cleaning this year. <br />Drainage Ditches: Photograph 3 shows the clean water drainage ditch adjacent#athe . <br />waste pile. Some coal from the road is seen in the ditch. A slightly higher berm <br />separating the ditch and road would like stop this from occumng. Figure 4 shows the <br />ditch on the other side of the top of the pile. The ditch intercepts runoff that comes off <br />the pile as well as the hillside. The channel is well formed but it is important that the <br />gradient of the ditch slopes toward the mine yard (toward camera). Some low spots <br />need to be repaired. All other drainage channels on the site were inspected and are in <br />good condition. Routine maintenance should be can'ied out to ensure that the entrances <br />to all pipes are free of debris. <br />Drainage in and around the upper and lower yards is working well and both are in good <br />shape. Photograph 5 shows the access road behind the shop. Except where noted, all <br />drainage features have been constructed and are operating as stated in the drainage <br />plan submitted to the Division of Minerals and Geology. <br />Coal Waste Pile: The upper portion of the waste pile (above the road) appears stable <br />and in good condition, photo 2. Care should be taken keep this surface relative uniform <br />an sloping to the drainage ditch (to the right in photo 2). As mentioned in previous <br />reports, the blocks placed at the toe of the water pile have improved slope stability. A <br />continuation of the blocks around the curve towards the photographer_would help_~__ _.. <br />remediate the oversteepened section seen in the photo. The design slope of the face is <br />3:1. The actual slope should be surveyed to confirm compliance. Ultimately another <br />course of block may be needed. Photo 6 shows a portion of the waste pile face above <br />the access road. As seen erosion rills in excess of 12 inches have formed during the <br />recent heavy rains. These should be monitored and repaired if they continue to grow. <br />Ultimately establishing vegetative cover should stabilize this area. <br />Except for the items mentioned above the fill on the waste pile has been constructed as <br />specified in the design approved by the Division of Minerals and Geology. <br />