2008-04-28_HYDROLOGY - C1981012

• Permit No: C1981012
• IBM Index Class Name: HYDROLOGY
• Doc Date: 4/28/2008
• Doc Name: 3rd Quarter 2007 Sediment Pond Inspection Reports
• From: Peak Project Management, LLC
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Email Name: KAG
• Media Type: D
• Archive: No

QUARTERLY SEDIMENTATION POND INSPECTION REPORT
CDMR Rule 4.05.9(17)
Mine: New Elk RDA Containment North
NPDES ID. No.: None
Inspection Period: Third Quarter 2007
Inspection Date: 09/21/07
General Description or Reference to Site Plan:
This incised containment basin is anon-discharging facility designed to contain nan-off from the
RDA belt conveyor area north of highway 12.
EMBANKMENT
1). Adequacy of the vegetative cover. Excellent Moderate ~ Poor
2). Erosion forming Gullies: Extensiv om Few None
r
3). Is wave action causing erosion:
On the Upstream embankment? Yes No f/'
4). Erosion of the downstream toe of the embankment? Yes No ~/
Cause of erosion can be attributed to:
5). Is seepage occurring through the dam? Yes No "~
Could this seepage cause potential instability?
SEDIMENT STORAGE CAPACITY
1). Has the design storage capacity of the reservoir been surpassed?
Yes No _ f~
Explain:
_ .,
OTHER OBSERVATIONS:
MSHA Qualified Impoundment nspector
21 v
Date