2012-02-23_HYDROLOGY - C1981012

• Permit No: C1981012
• IBM Index Class Name: HYDROLOGY
• Doc Date: 2/23/2012
• Doc Name: 4th Quarter 2011 Sedimentation Pond Inspection
• From: New Elk Coal Company, LLC
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: JHB
• Email Name: DIH
• Media Type: D
• Archive: No

Mine: New Elk
NPDES ID. No.:
Inspection Period:
Inspection Date:
QUARTERLY SEDIMENTATION POND INSPECTION REPORT
Pond #4
Fourth Quarter 2011
12/29/11
General Description or Reference to Site Plan:
This sediment control pond lies west of the Development Waste Pile. The majority of
run -off from this waste pile flows to this pond.
EMBANKMENT
1). Adequacy of the vegetative cover:
2). Erosion forming Gullies:
3). Is wave action causing erosion:
On the Upstream embankment?
At the principal spillway inlet?
CDMR Rule 4.05.9(17)
r !
Excellery`t Moderate Few
Extensive Some
Yes
Yes
4). Erosion of the downstream toe of the embankment? Yes
Cause of erosion can be attributed to:
5). Is seepage occurring through the dam?
Could this seepage cause potential instability?
Poor
None
No
No
Yes No
No
I-
v
PRINCIPAL SPILLWAY
1). Is the principal spillway system in working order? Yes t., No
2). Is the inlet free of debris and restrictive material? Yes // No
3). Is the discharge outlet free of restrictive material? Yes c _, - No
4). Is erosion occurring at the discharge outlet? Yes No —
Evaluate the severity: Extensive Moderate Just starting None