Laserfiche WebLink
QUARTERLY SEDIMENTATION POND INSPEGTION REPORT <br />CDMR Rule 4-05-9(17) <br />Mine: New Elk RDA Containment SE <br />NPDES ID- No-: None <br />Inspection Period: Fourth Quarter 2006 <br />Inspection Date: 12/26/06 <br />General Description or Reference to Site Plan: <br />This part~lly incised containment basin is anon-discharging facility designed to contain run-otf <br />from the area east of the RDA beR conveyor and south of highway 12. <br />1)- Adequacy of the vegetative oover- <br />2)- Erosion forming Gullies: <br />3). Is wave action causing erosion: <br />On the Upstream embankment? <br />Excellent Moderate ~ Poor <br />Extensive Some /~ None <br />Yes <br />No ~- <br />4). Erosion of the downstream toe of the embankment? Yes <br />Cause of erosion pn be attributed to: <br />No t__ <br />5). Is seepage occurring through the dam? Yes <br />Could this seepage cause potential instability? <br />No L <br />SEDIMENT STORAGE CAPACITY <br />1). Has the design storage capaaty of the reservoir been surpassed? <br />Yes <br />Explain: <br />~~ ~ <br />MSHA Qualifies Impoundment Ins r <br />Date ~~~0 <br />No l/ <br />