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ANNUAL SEDIMENTATION POND INSPECTION REPORT <br />CDMR Rule 4.05.9(15) <br />Mine: New Elk <br />NPDES ID. No.: None: Containment Area RDA-SW <br />Inspection Period: Fourth Quarter 2009 <br />Inspection Date: 12/03/09 <br />General Description or Reference to Site Plan: <br />This containment area lies west of the RDA refuse conveyor and south of Hwy. 12. It is designed <br />to contain run-off from this area of the RDA belt conveyor. Specifications are detailed on the <br />Containment Area RDA-SE As built drawing dated 4/24/93. The stage storage curve shows <br />top of embankment at 7415' with sediment accumulation to 7413.5'. <br />EMBANKMENT <br />1). Adequacy of the vegetative cover: <br />2). Erosion forming Gullies: <br />3). Is wave action causing erosion: <br />On the Upstream embankment? <br />4). Erosion of the downstream toe of the embankment? <br />Cause of erosion can be attributed to: <br />5). Is seepage occurring through the dam? <br />Could this seepage cause potential instability? <br />Excellent Moderate (ip <br />®Extensive Some e <br />Poor <br />None <br />No <br />No <br />Yes <br />Yes <br />Yes No [,- <br />SEDIMENT STORAGE CAPACITY <br />1). Has the design storage capacity of the reservoir been surpassed? <br />Yes No <br />Elevation @ top of: in, 7j /S. O <br />Elevation of Water Surface: <br />Elevation to top of Sediment: 7Cf/0 S <br />OBSERVA?QIONS <br />? 1.C (I (A _ ?RRc <br />l2o <br />0- <br />,r) <br />M HA Qualified Impoundment nspector <br />Date <br />Page 1 <br />-e- <br />Engineer Uirectlh§1hspe <br />??? ?,? i._„,•,?-????? `ems <br />????T ,fP P./ e!