2010-04-26_HYDROLOGY - C1982057

• Permit No: C1982057
• IBM Index Class Name: HYDROLOGY
• Doc Date: 4/26/2010
• Doc Name: 1st Quarter 2010 Sedimentation Pond Inspection
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Email Name: DTM
• Email Name: SB1
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: CO-0000221 D.P. 005
FACILITY CONFIGURATION: Cross-Valley Pond
SITE NAME: Pond #005
MINE NAME: Seneca II-W Mine (Seneca Coal Cc)
MINE I.D. NO.: CMLRD Permit No. C-82-057
DATE : -3-1%-10-
DATE LAST INSPECTION: 10 - 13 "OCI
LOCATION: NWY44 SWV4, Sec. 10, 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:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 3.5:1 upstream, 2.5:1 downstream
*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:
"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:
*Erosion of toe:
*Water impounded against toe:
Existing embankment freeboard: (normal = 7.41)
Increase Decrease in water level:
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in slurry surface:
*Clogging
Spillway channels and pipes:
Decant system: Inoperable
Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Decant system: Inoperable
Trash racks clear and in place:
Discharge rate (gpm)
*Major adverse changes in these items could cause instability and
Engineering manager and mine Superintendent for further evaluation.
these items should normally be described (extent, location, volume
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Yes
12 in.
_ Yes
_ No
Total = 6:1
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feet
feet
Yes No N/A
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Yes CID N/A
YTT?Q No N/A
?Xas? No N/A
should be reported to the
Adverse conditions noted in
etc.) in the space)I on the
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