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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 />~a.. ~" O7 <br />THICKNER UNDERF OW HOLDING POND <br />RISER CREST = 6827.0; DEWATER HOLE = 6823.0 <br />OPERATIONAL STATUS AT TIME OF INSPECTION <br />1 r / ~ <br />Approximate water level: F'_S f • Z 3 s~ ~-~f ~ i-,t ~/~ ~c' ,/(. S 1 ~ ~i~/ F l ( ~ <br />Sediment level (% total storage) ~~t~ <br />Outflow (cfs): /V G ~f-v~.~ <br />FEATURES PROBLEM COMMENTS <br />EROSIONAL: YES NO <br />Rills & Gullies on Embankments <br />Inadequate Vegetation ~ <br />Shv,,,/ Co/~/ <br />Outlet Channel Erosion +~ <br />Burrows <br />Other <br /> <br />STRUCTURAL: <br /> `~ <br />Differential Settling <br />Cracks or Slides r <br /> <br />Seepage <br />Other <br />APPURTENANT STRUCTURES: <br />Defective Spillways ~ <br />Dewatering Device Clogged ~. <br />Faulty Gates, Baffles, Pumps <br />Other <br />ADDITIONAL COMMENTS: <br />MAINTENANCE <br />is/documenUgrtlypnd/Pondinsp. doc <br />