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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 />~/3a~o-7 <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: <br />Sediment Ievel (% total storage) <br />Outflow (cfs): <br />.QS ~ ~ ~ ~ <br />~0~ <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 Y <br />Faulty Gates, Baffles, Pumps <br />Other <br />ADDITIONAL COMMENTS: <br />MAINTENANCE REQUIRED: <br />INSPECTOR: ~/~~~ h/ fit- 1~7`-ti/St9k . <br />is/documenVgr[typnd/Pondinsp.doc <br />