2013-10-01_HYDROLOGY - C1982057 ‎(2)‎

• Permit No: C1982057
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/1/2013
• Doc Name: 3rd Quarter 2013 Quarterly Sedimentation Pond Inspection Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: JHB
• Email Name: DIH
• Media Type: D
• Archive: No

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Circle or write in appropriate response
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,
*Seepage (specify location, color, and
From underdrain pipes:
At isolated points on embankment
At natural hillside:
Over widespread areas:
From downstream foundation area:
"Boils" beneath stream or ponded water:
Cracks or scarps on crest:
2.5:1 downstream Total =
approximate volume)
slopes:
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 = 6.91)
Increase X 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:
Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place:
Discharge rate (gpm)
Yes
12 in.
Yes
No
6.1
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
11.9 feet
2.0 feet
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
0_0
�Il_1
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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.
PERIODIC INSPECTION FORM
Water, Sediment, or
Slurry Impoundments
INSPECTOR'S
NAME: Chris Miller
DATE: 9 -5-13
NPDES I.D.
NO.: CO- 0000221 D.P. 009
FACILITY CONFIGURATION:
Cross - Valley Pond
DATE LAST INSPECTION:
6 -7.13
SITE NAME:
Pond #009
LOCATION: SEA SW�,4,
Sec. 11, T5N, R88W
MINE NAME:
Seneca II -W Mine (Seneca Coal Co)
LOCATION: 8 mi. S
of Hayden, CO
MINE I.D.
NO.: CMLRD Permit No. C -82 -057
OWNER'S REP.: Roy
Karo, Gen Mgr
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6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
Circle or write in appropriate response
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,
*Seepage (specify location, color, and
From underdrain pipes:
At isolated points on embankment
At natural hillside:
Over widespread areas:
From downstream foundation area:
"Boils" beneath stream or ponded water:
Cracks or scarps on crest:
2.5:1 downstream Total =
approximate volume)
slopes:
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 = 6.91)
Increase X 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:
Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place:
Discharge rate (gpm)
Yes
12 in.
Yes
No
6.1
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
11.9 feet
2.0 feet
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No
0_0
�Il_1
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N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
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.