HYDRO30065

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 7/31/2006
• Doc Name: 2nd Quarter 2006 Sedimentation Pond Inspections
• From: Seneca Coal Company
• To: DMG
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment~t.or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: C~ - d O - D
NPDES I.D. NO.: CO-0000221 D.P. 005 3 _~. 0 /
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: G
SITE NAME: Pond #005 LOCATION: NW'/. SWs/., Sec. 10. T5N, R88W ~ .
MINE NAME: Seneca II-W Mine'(Seneca Coal Co) LOCATION: 8 mi. S of Hayden. CO
MINE I.D. NO.: CMLRD Permit No.~C-82-057 OWNER'S REP.: Greag Kitchen, Gen M4r=~. ~`.~~.
Circle or write in appropriate response
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Foundation preparation (removal of vegetation, stumps, topsoil: Yes
Lift thickness: 12 in.
Compaction according to approved plan: Yes
Burning (specify extent and location ~•: No
Angle of slope: 3.5:1 upstream, 2.5:1 downstream Total = 6:1
*Seepage (specify location, color, and approximate volume)
From underdrain pipes: ~ ~Q es
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 o
Cracks or scarps on crest: Yes o
Cracks or scarps on slope: ~ ~ es
Sloughing or bulging on slope: ~ Yes No
*Major erosion problems: Yes No
Surface movements in valley bottom or on hillside: Yes No
*Erosion of toe: Yes No
*Water impounded against toe: Yes No
Existing embankment freeboard: (normal = 7.4') q_~ feet
Increase l/ Decrease in water level: eZ feet
Cracks, bulging, or erosion on upstream face: Yes
Visible sumps or sinkholes in slurry surface: NL
*Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place: _
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Yes No N/A
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Yes 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.