2010-12-22_HYDROLOGY - C1982057 ‎(2)‎

• Permit No: C1982057
• IBM Index Class Name: HYDROLOGY
• Doc Date: 12/22/2010
• Doc Name: 4th Quarter 2010 Sedimentation Pond Inspections
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Email Name: SB1
• Email Name: SLB
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: _ Dennis Jones
NPDES I.D. NO.: N/A
FACILITY CONFIGURATION:
SITE NAME: Pond #016A
MINE NAME: Seneca II-W Mine (Seneca Coal Cc)
MINE I.D. NO.: CMLRD Permit No. C-82-057
DATE : 0 ^ IL(_ 1 0
DATE LAST INSPECTION: IV
LOCATION: NE1/, SE?/a, Sec. 27, T5N, R88W
LOCATION: 8 mi. S of Hayden, CO
OWNER'S REP.: Roy Karo, Gen Mgr
Circle or write in appropriate response
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Foundation preparation (removal of vegetation, stumps, topsoil: Yes
Lift thickness: in.
Compaction according to approved plan:
Burning (specify extent and location): No
Angle of slope: 3:1 upstream, 3:1 downstream Total = 6:1
*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: 5`a 0 d1vc? S
"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: 6&e c(1
*Erosion of toe:
*Water impounded against toe:
Existing embankment freeboard: (normal = 5.41, 2008)
Increase Decrease in water level: v..u e,4ak
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
Spillway pipes:
Decant system:
Trash racks clear and in place:
Discharge rate (gpm)
N/A
Yes No N/A
Yes No N/A
Yes N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes N N/A
Yes No N/A
Yes ] N/A
Yes (No N/A
S i{ feet
feet
Yes ©° N/A
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Yes N/A
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Yes G N/A
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es No N/A
IQ
*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.
Cross-Valley Pond