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t INSPECTION REPORT Site: National King Coal Mine, Hesperus, Colorado Inspected By: Don R. May, P.E., Project Engineer Inspection Date: Quarterly Inspection, March 31, 1996 .;m9[I.i111ljr(~~ '~U. Ponds: The east and west sedimentation ponds and their embankments are in good condition. There are no signs of excessive erosion of the inlet channels or outlet spillways and all pipes are in good condition. As seen in photographs 1 and 2 the pond have been cleaned and are ready for spring runoff. Drainage Ditches: Photograph 3 shows the drainage channel behind the office. It is in good condition. Photograph 4 shows the eastside channel adjacent to the toe of the coal waste pile. As seen it has some heavy vegetation growing in it. Grass and small vegetation will help stabilize the bed and banks, however oak brush and other large plants are beginning to move in and could cause blockage. These should be removed. The ditch comming off the hill behind the daysleeper trailer, on the west side of the yard, has been partially blocked with a pile of dirt, as shown in photogrpah 5. Photograph 6 shows the coal waste pile looking down the eastside drainage. As seen the access road on the right is built as designed but recent placement of fill has obscured the ditch at the toe of the waste pile. This ditch should allow water to flow continuously from the top of the pile around the east end and then west, below the pile, along the high road and down into the yard. A small pipe has been installed to allow water to drain under the road as it turns and goes up the waste pile. The pipes and ditches in the yard are all clean and in good operating order. Except for the conditions mentioned above, all drainage features have been constructed and are operating as stated in the drainage plan submitted to the Division of Minerals and Geology. Coal Waste Pile: There are no signs of structural instability on the waste pile. Recent fill has been placed at the base of the pile as planned. Photograph 6 shows the waste pile. The slope of the waste pile formed by placement of new material exceeds the design slope of 3:1 Ihorz:vert). It appears to be closer to 1:1. This should be confirmed and adjustments made to the face as needed to assure the design slope is met. The highwall and other slopes at the site appear stable. Except for the items mentioned above the fill on the waste pile has been constructed as specified in the design approved by the Division of Minerals and Geology.