2009-01-22_HYDROLOGY - C1994082

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/22/2009
• Doc Name: 4th Quarter 2008 Sedimentation Pond Inspections
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Email Name: DTM
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: 16 3 - Q 6
NPDES I.D. NO.: N/A Q
FACILITY C ONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: - 0 V
SITE NAME: Pond #011A LOCATION: SWIA NW1/4, Sec. 16, T5N, R87W
MINE NAME: Yoast Mine(Seneca Coal Co) LOCATION: 8.5 mi. SE of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-94-082 OWNER'S REP.: Roy Karo, Gen Mar
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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)
Total = 6.0:1
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
*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
Existing embankment fjreeboard: (normal = 4.51) 6-.--r feet
Increase ? Decrease in water level: O. S feet
Cracks, bulging, or erosion on upstream face: Yes Q
Visible sumps or sinkholes in slurry surface: N/A
*Clogging
Spillway channels and pipes: Yes
Decant system: N A
Diversion ditches: N/A
*Cracking or crushing of pipes
Spillway pipes: Yes No
Decant system: N/A
Trash racks clear and in lace: Yes No
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Discharge rate (gpm) ( ?
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Yes
in.
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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.