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OPERATOR: <br />u <br />MINE: <br />DATE OF INSPECTION: <br />SEDIMENT POND IDENTIFICATION: <br />REFERENCE ELEVATIONS: <br />TWENTYMILE COAL COMPANY <br />FOIDEL CREEK MINE <br />9~2x~~ <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: G15~-_ ~ t; ~~ ~~~ ~~ <br />Sediment level (% total storage) ~ S' duo <br />Outflow (cfs): ~~,^~ ,., / <br /> <br />FEATURES PROBLEM COMMENTS <br />EROSIONAL: YES NO <br />Rills & Gullies on Embankments ~, <br />Inadequate Vegetation ~/ <br />Outlet Channel Erosion ~L/ <br />Burrows f/ <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 r/ <br />Faulty Gates, Baffles, Pumps <br />Other <br />ADDITIONAL COMMENTS: <br />MAINTENANCE REQUIRED: <br />INSPECTOR: ~, ~ ~ ~VCi !1 '~~!S~ <br />• <br />is/documenVgrtlypnd/Pondinsp.doc <br />