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ANNUAL SEDIMENTATION POND INSPECTION REPORT <br />Mine: New Elk <br />NPDES ID. No.: <br />Inspection Period: <br />Inspection Date: <br />CDMR Rule 4.05.9(15) <br />None. Containment Area RDA -N <br />Second Quarter 2016 <br />06/20/16 <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 />Excel len Moderat Few Poor <br />Extensive Some Few None <br />4). Erosion of the downstream toe of the embankment' <br />Cause of erosion can be attributed to: <br />Yes <br />Yes <br />5). Is seepage occurring through the dam? Yes <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 <br />urpassed?Yes <br />Elevation @ top of: Li`'/�- N -i j"7ql `r <br />Elevation of Water Surface: <br />Elevation to top of Sediment <br />OTHER OBSERVATIONS <br />MSHA Qualified Impound ent I ctor <br />Date <br />No Pl_ <br />No <br />Nom% <br />• A� <br />Page 1 <br />Professional Engineer Directing Inspe�tic,� <br />Date <br />