2007-11-30_HYDROLOGY - C1980005

• Permit No: C1980005
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/30/2007
• Doc Name: 4th Quarter 2007 Sedimentation Pond Inspection Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry ImpoundQments
D pis Jones DATE : ~~- `-~~
INSPECTOR'S NAME: en
NPDES I.D. NO.: CO-0000221 D.P. 004
FACILITY CONF]:GURATION: Cross-Valley Pond
SITE NAME: South Section 12 Pond #004
MINE NAME: Seneca II Mine (Seneca Coal Co)
MINE I.D. NO.: CMLRD Permit No. C-80-005
DATE LAST INSPECTION: (~6I~
LOCATION: SWl/, SE1/ Sec 12 T5N R87W
LOCATION: 7 1 mi SE of Hayden CO
OWNER'S REP.: GreQa Kitchen Gen Mqr
Circle or write in appropriate response
1.
2.
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8.
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10
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12
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20.
21.
Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
u stream, 2:1 downstream
Angle of slope: 5:1 P
*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 cress:
l
ope:
Cracks or scarps on s
Sloughing or bulging on slope:

*Major e°rosion problems:
hillside:
Surface' movements in valley bottom or on
*Erosiorr of toe:
*Water impounded against toe:
Existing embankment freeboard: normal = 4.8'
:Cncrease Decrease in wate r level : ~ ~ ~ °~~``~~-
Cracks, bulging, or erosion on upstre am face:
Visible sumps or sinkholes in slurry surface:
*Clogging
Spillway channels and pipes: Ino erable
:Decant system:
:Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Ino erable
Decant system:
ce:
l
i
a
n p
Trash racks clear and
(gpm)
Discharge rate
o
Yes iU N/A
yeY~ s -I~ro N/A
Yes IQo N/A
TCg TT TT / T
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.
Yes
12
Yes
No
~A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes o N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes N N/A
~_ feet.
feet
__
Yes No N/A
~A
Total
7:1