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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 />~3~13~c~ <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: ~ i / r',l JD./ `j// ,.~,~ ~„~ SG`YJ~~ ~rvl/~t~, Gv~%J~/ <br />Sediment level (% total storage) ,, /GS~~e <br />Outflow (cfs): /y ~ ~~ <br />FEATURES PROBLEM COMMENTS <br />EROSIONAL: YES NO <br />Rills & Gullies on Embankments <br />,i' <br />Inadequate Vegetation <br />Outlet Channel Erosion ~• J h0 ~ CCI/.C~,~ <br />Burrows <br />Other <br />STRUCTURAL: `~ <br />Differential Settling <br />Cracks or Slides ~. <br />Seepage <br />Other <br />APPURTENANT STRUCTURES: <br /> <br />Defective Spillways <br />Dewatering Device Clogged <br />Faulty Gates, Baffles, Pumps <br />Other <br />ADDITIONAL COMMENTS: ~~ `i/~re ~ a c~Y <br />MAINTENANCE REQUIRED-T( %~ ~.--t~ ~ <br />Lt~'S° <br />l <br />,, 2~0 $/ <br />is/documenUgrtlypnd/Pondinsp.doc <br />