2009-01-22_HYDROLOGY - C1980005

• Permit No: C1980005
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/22/2009
• Doc Name: 4th Qrtr 2008 Sedimentation Pond Inspections
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Email Name: DTM
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or slurry impoundments
INSPECTOR'S NAME: Dennis Jones DATE: 10 I- U 08
NPDES I.D. NO.: CO-0000221 D.P. 003
FACILITY CONFIGURATION: Diked Pond
SITE NAME: Northwest Impoundment #003
MINE NAME: Seneca II Mine (Seneca Coal Co)
MINE I.D. NO.: CMLRD Permit No. C-80-005
DATE LAST INSPECTION: O- 2 -0
LOCATION: SEV/ SW/ 4, 27, T6N, R W
LOCATION: 7.1 mi. SE of Hayden, CO
OWNER'S REP.: Roy Karo, Gen Mar
Circle or write in appropriate response
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Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 2:1 upstream, 3:1 downstream
*Seepage (specify location, color, and approximate volume)
From underdrain pipes:
At isolated points on embankment slopes:
At natural hillside:
Over widespread areas:
From downstream foundation area:
"Boils" beneath stream or ponded water:
Cracks or scarps on crest:
Cracks or scarps on slope:
Sloughing or bulging on slope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
*Erosion of toe:
*Water impounded against toe:
Existing embankment freeboard: (normal = 4.91)
Increase Decrease in water level: Kn clti a
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in slurry surface:
*Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Cracking or crushing of pipes
in.
5:1
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Yes N/A

feet
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Spillway pipes: Yes No N/A
Decant system: N/A
Trash racks clear and in place: Yes No N/A
Discharge rate (gpm) °Z
*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.
Yes
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Yes
_ No
Total =
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