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~- ~ I <br />INSPECTION REPORT !~fiC~iVED <br />Site: National King Coal Mine, Hesperus, Colorado ®Cr 29 <br />i7;v~sionolMt 2/s <br />Inspected By: Don R. May, P.E., Project Engineer rte <br />inspection Date: Quarterly Inspection, September 30, 2001 &Gepygy <br />Ponds: The east and west sedimentation ponds and their embankments and outlets <br />appear in good condition. Water covers the bottom of the west pond and it appears that <br />the pond may need cleaning. Periodic maintenance of the pond outlet works should be <br />carried out to assure that the low flow pipe is clear of debris on both end. The spillway <br />should also be cleared of any debris. <br />D!ainape Ditches: The eastside and westside drainage channels appear in good general <br />condition. The armored ditches that run down the sides of the waste pile are performing <br />well. It appears that a significant amount of fill has been placed on the top of the pile <br />since the last inspection. The ditch on the south edge of the pile top is poorly formed. <br />Care should be take when placing fill to assure that this ditch maintains its v-shape and <br />is sloping toward the front of the pile. Other ditches, pipes and structures in and around <br />the yard were inspected and appear in good condition. There are no apparent drainage <br />problems on the site. All drainage features have been constructed and are operating as <br />stated in the drainage plan submitted to the Division of Minerals and Geology. <br />Coal Waste Pile: There are no visible signs of structural instability on the waste pile. As <br />mentioned, new fill material is evident on top of the pile. It is important that the waste <br />material be placed in {ifts not to exceed 12" to 1 B° and that compaction results in the <br />density stated in the design report. It is not possible to determine this by visual <br />inspection and therefore the density should be periodically checked by measurement. <br />It is recommended that the upstream end of the waste pile underdrain be located and <br />marked. As the pile grow this task will become more difficulty. <br />Except for the items mentioned above the waste pile has been constructed as stated in <br />the reclamation plans submitted to the Division of Minerals and Geology. <br />(NOTE: Due to camera failure there are on photographs with this report.) <br />-_ ( ; / <br />