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OPERATOR: <br />MINE: <br />DATE OF INSPECTION: <br />SEDIMENT POND IDENTIFICATION: <br />REFERENCE ELEVATIONS: <br />TWENTYMILE COAL COMPANY <br />FOIDEL CREEK MINE <br />& 26& <br />THICKNER UNDERFLOW HOLDING POND <br />RISER CREST = 6827.0; DEWATER HOLE = 6823.0 <br />OPERATIONAL STATUS AT TIME OF INSPECTION <br />Approximate water level: 'C (o Z 3 _ <br />Sediment level (% total storage) ly es <br />Outflow (cfs):?{ h <br />• <br />FEATURES PROBLEM COMMENTS <br />EROSIONAL: YES NO <br />Rills & Gullies on Embankments <br />Inadequate Vegetation <br />Outlet Channel Erosion <br />Burrows <br />Other <br />STRUCTURAL: <br />Differential Settling <br />Cracks or Slides <br />Seepage <br />Other <br />APPURTENANT STRUCTURES: <br />Defective Spillways <br />Dewatering Device Clogged <br />Faulty Gates, Baffles, Pumps / <br />Other <br />• <br />ADDITIONAL COMMENTS: <br />MAINTENANCE REOUIREE <br />is/document/grtlypnd/Pondinsp.doc