HYDRO30603

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 4/2/2007
• Doc Name: 1st Quarter 2007 Sedimentation Pond Inspections
• 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:
Co
NPDES I.D , NO.: N A 1
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FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INS PECTION:
SITE NAME ; Pond #O11A ~ LOCATION: SW'/, NW'/., Sec. 16, T5N, R87W
MINE NAME : Yoast Mine (Seneca Coal Co) LOCATION: 8 5 mi. SE of Hay den. CO
MINE I.D. iVO.: CMLRD Permit No. C-94-082 OWNER'S REP.: Gregg Kitchen . Gen Mgr
Circle Or Wrlte In apDTOpriate reSpOnae
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Foundation preparation (removal of vegetation, stumps, topsoil: Yes
Lift thickness: in.
Compaction according to approved plan: Yes
Burning (specify extent and location): No
Angle of slope: 3.0:1 upstream, 3.0:1 downstream Total = 6.0:1
*Seepage (specify location, color, and approximate volume)
From underdrain pipes: N A
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 on hillside: Yes No
*Erosion of toe: Yes No
*Water impounded against toe: Yes No
Existing embankment freeboard: (normal = 4.5') feet
Increase Decrease in water level: feet
Cracks, bulging, or erosion on upstream face: Yes No
Visible sumps or sinkholes in slurry surface:
*Clogging
Spillway channels and pipes: Yes No
Decant system:
Diversion ditches: N/A
*Cracking or crushing of pipes
Spillway pipes: Yes No
Decant system:
Trash racks clear and in place: Yes No
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*Maj or 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.