2009-10-29_HYDROLOGY - C1982057 ‎(2)‎

• Permit No: C1982057
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/29/2009
• Doc Name: 3rd Quarter 2009 Sedimentation Pond Inspection
• From: Seneca Coal Company
• To: DRMS
• Email Name: DTM
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: N/A
FACILITY CONFIGURATION: Cross-Valley Pond
SITE NAME: Pond #016A
MINE NAME: Seneca II-W Mine (Seneca Coal
MINE I.D. NO.: CMLRD Permit No. C-82-057
Cc
DATE : z -C'
DATE LAST INSPECTION: 1 t
LOCATION: NEV44 SEl/,, Sec. 27, TSN, R88W
LOCATION: 8-mi. S of Hayden, CO
OWNER'S REP.: Roy Karo, Gen Mgr
Circle or write in appropriate response
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Foundation preparation (removal of vegetation, stumps, topsoil: Yes
Lift thickness: in.
Compaction according to approved plan:
Burning (specify extent and location): No
Angle of slope: 3:1 upstream, 3:1 downstream Total = 6:1
*Seepage (specify location, color, and approximate volume)
From underdrain pipes: N/A
At isolated points on embankment slopes: Yes No
At natural hillside: Yes No
over widespread areas: Yes No
From downstream foundation area: ?Q0?F?.c? S ti es o
"Boils" beneath stream or ponded water: Yes No
Cracks or scarps on crest: Yes No
Cracks or scarps on slope: Yes No
Sloughing or bulging on slope: Yes No
*Major erosion problems: Yes No
Surface movements in valley bottom or on hillside: Se-e- 0,4" S Cre-1
b
No
*Erosion of toe: Yes No
*Water impounded against toe: Yes No
Existing embankment freeboard: (normal = 5.41, 2008) feet
Increase Decrease in water level: feet
Cracks, bulging, or erosion on upstream face: Yes
visible sumps or sinkholes in slurry surface: N/A
*Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place:
Discharge rate (gpm)
Yes (Nd
N/A ??
N/A
Yes No
N/A
Yes No
a
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N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
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N/A
*Major adverse changes in these items could cause instability and should be reported to the
Engineering Manager and Mine Superintendent for further evaluation. Adverse conditions noted in
these items should normally be described (extent, location, volume, etc.) in the space on the
back of this sheet.