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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: Second Quarter 2008 <br />Inspection Date: 06/30/08 <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 4124193. The stage storage curve shows <br />top of embankment at 7415 with sediment accumulation to 74135. <br />EMBANKMENT <br />1). Adequacy of the vegetative cover. Excellent <br />2). Erosion forming Gullies: Extensive <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 />Moderate Ifej) Poor <br />Some CF None <br />Yes <br />No r? <br />Yes <br />No L-- <br />5). Is seepage occurring through the dam? Yes No U <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 No 4,/ <br />Elevation @ top of <br />Elevation of Water Surface: <br />Elevation to top of Sediment: <br />OBSERVATIONS <br />/1 /) 'V <br />I AA <br />Ogg <br />Professional Engineer Directing Ins n <br />'7f Z o $ `7/ Iff <br />De at' T Date <br />O.0 <br />Page 1-