HYDRO24087

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 10/5/2007
• Doc Name: 3rd Quarter 2007 Sedimentation Inspection Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments

INSPECTOR'S NAME: Dennis Jones DATE: U-a ~'~~
NPDES I.D. NO.: N/A ~•~010~
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION:
SITE NAME: Pond #O11A LOCATION: SW% NW'/,. Sec. 16, T5N. R67W
MINE NAME: Yoast Mine (Seneca Coal Co) LOCATION: 8.5 mi. SE of Havden. CO
MINE I.D. NO.: CMLRD Permit No. C-94-082 OWNER'S REP.: Greaa Kitchen, Gen Mar
C1rOle OT write 1n apprODrlate reSIJOnSe
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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: 3.0:1 upstream, 3.0:1 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 o£ toe:
*Water impounded against toe:
Existing embankment freeboard: (normal = 4.5')
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

Yes No N/A
Yes No N/A
Yes N N/A
Yes N N/A
Yes N N/A
Yes N N/A
Yes N N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
feet
~_ f
ee
t
Yes ,
~
`
l~-~ N/A
N/A
Yes 1VO N/A
NL?1
N A
Spillway pipes: Yes ll~
Decant system:
20. Trash racks clear and in lace: t~ es No
21 . Discharge rate (gpm) (~' ct~'Q,J.~~ ?.~~ y'{, o W ~ `~
*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
_ in.
_ Yes
No
Total = 6.0:1
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