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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-N <br />u Inspection Period: Fourth Quarter 2004 <br />Inspection Date: 11126!04 <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: <br />2). Erosion forming Gullies: <br />3). Is wave action causing erosion: <br />On the Upstream embankment? <br />Excellent derat Few Poor <br />Extensive ome Few None <br />Yes <br />4). Erosion of the downstream toe of the embankment? <br />Cause of erosion can be attributed to: <br />Yes <br />No (~. <br />No L~- <br />5). Is seepage occurring through the dam? Yes <br />Could this Lepage cause potential instability? <br />No <br />SEDIMENT STORAGE CAPACITY <br />,. 1). Has the design storage capacity of the reservoir been surpassed? <br />Yes No <br />Elevation @ top of: ~'.., 104 N 1~ mP N~ = 7'/ / 9 <br />Elevation of Water Surface: /~ p - 9. Z ~ - 7y09. 8 <br />Elevation to top of Sediment: Asswme_ /' icy 7Yo6, B <br />OTHER OBSERVATIONS <br />`r~ f <br />• .-.'a <br />i ~'. ~ `= <br />~; <br />.~~:. <br />Page 1 <br />Dat- a Date ' <br />