HYDRO21626

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 10/24/2005
• Doc Name: 3rd Quarter 2005 Sedimentation Pond Inspection
• From: Seneca Coal Company
• To: DMG
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

FERIODIC INSPECTION FORM
- Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: -~-~
NPDES I.D. NO.: CO-0000221 D.P. 004
FACILITY CONFIGURATION: Cross-Valley Pond
SITE NAME: South Section 12 Pond #004
MINE NAME: Seneca II Mine (Seneca Coal Co)
MINE I.D. NO.: CMLRD Permit No. C-80-005
DATE LAST INSPECTION: _ ~ L~ ~ ~~
LOCATION: SW'/. SEA/., Sec. 12, TSN. R87W
LOCATION: 7.1 mi. SE of Hayden, CO
OWNER'S REP.: Greoa Kitchen, 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: 5:1 upstream, 2:1 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.$')
increase Decrease in water level:
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
Spillway pipes:
Decant system:
Trash racks clear and in place:
Total
Yes
12
_ Yes
No
NL
7:1
Yes No N/A
Yes No N/A
Yes NO N/A
Yes No NJA
Yes No N/A
Yes No N/A
Yes NO N/A
Yes No NfA
Yes No N/A
Yes No N/A
Yes No N/A
Yes N NfA
~8 feet
_ feet
Yes ~ N/A

Yes No N/A
Yes ~
No N/A
Yes No N/A
Yes o N/A
Y2S NO N/A
Yes No 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.