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ANNUAL SEDIMENTATION POND INSPECTION REPORT <br />Mine: New Elk <br />NPDES ID. No.: None: Containment Area RDA -N <br />Inspection Period: Fourth Quarter 2012 <br />Inspection Date: 12/20/12 <br />General Description or Reference to Site Plan: <br />This containment area lies west of the RDA refuse conveyor and north 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 -N As built drawing dated 4/22/93. The stage storage curve shows <br />top of embankment at 7419' with 8.0' storage for the 25 -yr 24 -hr. event. <br />EMBANKMENT <br />1). Adequacy of the vegetative cover: Excellent Moderate Poor <br />2). Erosion forming Gullies: Extensive Few None <br />OTHER OBSERVATI ONS <br />•4. - fzu b ,n E%r 1 d 5 1/) c. J <br />SHA Qualified Impoundm nt Inspector <br />�a - c of <br />Date <br />CDMR Rule 4.05.9(15) <br />Page 1 <br />3). Is wave action causing erosion: <br />On the Upstream embankment? Yes No <br />4). Erosion of the downstream toe of the embankment' Yes No <br />Cause of erosion can be attributed to: <br />5). Is seepage occurring through the dam? Yes No <br />Could this seepage cause potential instability? <br />SEDIMENT STORAGE CAPACITY <br />1). Has the design storage capacity of the reservoir been surpassed? <br />/ Yes L— - No <br />Elevation @ top of: (;1 Li <br />Elevation of Water Surface: <br />Elevation to top of Sediment: <br />. 71//g <br />7y' <br />tte -Iona Engi eer P - cti <br />Date <br />