Laserfiche WebLink
ANNUAL SEDIMENTATION POND INSPECTION REPORT <br />CDMR Rule 4.05.9(15) <br />Mine: New Elk <br />NPDES ID. No.: <br />Inspection Period: <br />Inspection Date: <br />None: Containment Area #1 <br />Fourth Quarter 2009 <br />12/03/09 <br />General Description or Reference to Site Plan: <br />This containment basin lies east of the West Portal Manway. Specifications are detailed on the <br />Containment Area No.1 as built drawing certified on May 7, 1993. The stage storage curve shows <br />top of embankment at 7537.0' with sediment accumulation to 7529'. <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? Yes <br />Cause of erosion can be attributed to: <br />Yes <br />Poor <br />None <br />No <br />No C/ <br />No l? <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 4-?- No <br />Elevation @ top of: <br />Elevation of Water Su <br />Elevation to top of Sec <br />gtn'jj, <br />MSHA Qualified Impoundmen Inspector <br />Date <br />0xcelle t Moderate Few <br />Extensive Some U"" <br /> <br />Professional Engine r <br /> <br />`- <br /> ' <br />T <br />Date •- <br />a'm'- <br /> <br /> <br />Page 1 .:',?? <br />x <br /> rl, <br />