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-~ <br /> <br />INSPECTION REPORT <br />Site: National King Coal Mire, Hesperus, Colorado <br />Inspected By: Don R. May, P.E., Project Engineer <br />Inspection Date <br />Quarterly Inspection, September 24, 19J4 <br />Ponds: The east and west sedimentation ponds are in good condition. <br />There are no signs of ero:~ion or excessive filling in of the ponds or <br />the approach channels. The condition of the spillway and low flow <br />o,atlet have not changed since the last inspection. Some water ir, tt,e <br />West. Por,d wt,ich is not being drained by the low flow outlet, See <br />previous reports for recommendations. <br />channel which has exposed bedrock. <br />There is no definable channel between the toe of the waste pile and <br />thF Eastside Channel. The drainage plan galls for a small channel at, <br />tl~e toe. All other ditches and pipes appeared in good r_onclitior,. <br />Except for the it erns cited above all drainage feat,,rres have been <br />c:onst.rur_ted and are operating as stated in tl,e drainage plan sut,mi.tted <br />to the Division of Minerals and Geology. <br />Druinhee Ditche = The erosion problems around the outlet of the two <br />18 inch black plastic corrugated pipes located behind the office <br />sported during the last inspection have been fixed. The hay bale <br />serlirnent trap on the Eastrside r_hannel has formed a drop in the channel <br />ir,vFrt; of about 3 feet and could possibly induce erosion. The bale <br />should he removed and replaced. Apparently the area received a large <br />rainfall recently. There are signs of accelerated erosion in tF,e <br />Coal Waste Pile: The placement of new material appears to he in srnHll <br />lifts along the lower front edge of the pile according to i:.he_plan. _ _ <br />Corngaction has been achieved by repeated passes of the heavy equipment <br />,aced ir, moving the waste material. It appears as thougl, water from tl'ir; <br />top of the pile Y,as flowed down the face during tt,e lager rainstorm. <br />This has generated rills on the face of the pile one w1-,ich appears t_o <br />have been fixed. Some ponding exists on the top of the pile. A more <br />defi,,ed drainage channel along tt,e top of the pile is needed. There <br />are no signs of structural instability on the waste pile. The fill nn <br />the waste pile has been constructed as specified in the design <br />approved by the Divisior, of Minerals and Geology. <br />NOTE= D,ae to a camera malfunr_tion there are no photographs with this <br />report. <br />