HYDRO29281

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 12/4/2006
• Doc Name: 4th Quarter 2006 Pond 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

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INSPECTOR S NAME: Dennis Jones DATE:
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NPDES I.D. NO.: CO-0000221 D.P. 015 (
0 /
FACILITY CONFIGURATION: Cross-Valley Pond ~
DATE LAST INSPECTION: ~ `
l C~
SITE NAME: Pond #015 LOCATION: NE'/, SE'/, Sec. 23, TSN R88W
MINE NAME: Seneca II-W Mine (Seneca Coal Co ) LOCATION: 8 mi. S of Ha yden. CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Gregg Kitchen Gen Mar
Circle or write in appropriate response
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Foundation preparation (removal of vegetation, stumps, topsoil
Lift thickness:
Yes
12
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 2.5:1 upstream, 3.5:1 downstream
*Seepage (specify location, color, and approximate volume)
_ Yes
_ No
Total = 6:1
From underdrain pipes:
At isolated points on embankment slopes: Yes No
At natural hillside: Yes No
Over widespread areas: Yes No
From downstream foundation area: Yes No
"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
*Maj or erosion problems: Yes No
Surface movements in valley bottom or o n hillside: Yes No
*Erosion of toe: Yes No
*Water impounded against toe: Yes No
Existing embankment freeboard: (normal = 4.0') ~.0 feet

Increase Decrease in water level: O •~ feet
Cracks, bulging, or erosion on upstream face: Yes
Visible sumps or sinkholes in slurry surface:
*Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Cracking or crushing o£ pipes
Spillway pipes:
Decant system:
Trash racks clear and in place:
Yes No
NL
Yes
Yes No
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*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.