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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 />~/ 22/ 0 l.. <br />THICKNER UNDERFLOW HOLDING POND <br />C/n, /JU/r/r7inC-uT- <br />RISER CREST = 6527.0; DEWATER HOLE = 6823.0 <br />OPERATIONAL STATUS AT TIME OF INSPECTION <br />Approximate water level: N ~ 6~~ 1 (0 f ~2 ~0 ~/ C~PST~ <br />a <br />Sediment level (%a total storage) ~S ~~ <br />Outflow (cfs): <br />FEATURES PROBLEM COMMENTS <br />EROSIONAL: <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 />YES NO <br />/ '70/ "Ph r'~~ ~c ~~ <br />r~ <br />~/ <br />NH <br />~~ <br />il/A <br />ADDITIONAL COMMENTS: <br />MAINTENANCE <br />is/documenVgrtlypnd/Pondinsp.doc <br />