2013-05-14_HYDROLOGY - C1982057 ‎(3)‎

• Permit No: C1982057
• IBM Index Class Name: HYDROLOGY
• Doc Date: 5/14/2013
• Doc Name: 1st Quarter 2013 Sedimentation Pond Inspection
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: JLE
• Email Name: SB1
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: �" 5 – (2)
NPDES I.D. NO.: CO- 0000221 D.P. 016
FACILITY CONFIGURATION: Cross - Valley Pond
SITE NAME: Pond #016
MINE NAME: Seneca II -W Mine (Seneca Coal Cc)
MINE I.D. NO.: CMLRD Permit No. C -82 -057
DATE LAST INSPECTION: 11-t-3 -I Z
LOCATION: NEV44 SEV44, Sec. 27, TSN, R88W
LOCATION: 8 mi. S of Hayden, CO
OWNER'S REP.: Roy Karo, Gen Mgr
Circle or write in appropriate response
1.
Foundation preparation (removal of vegetation, stumps, topsoil:
Yes
2.
Lift thickness:
in.
3.
Compaction according to approved plan:
Yes
4.
Burning (specify extent and location):
No
5.
Angle of slope: 3:1 upstream, 3:1
downstream
Total = 6:1
6.
*Seepage (specify location, color, and approximate
volume)
From underdrain pipes:
N/A
At isolated points on embankment slopes:
Ye.9
ED
N/A
At natural hillside: dj:
es
No
N/A
Over widespread areas:
Yes
N/A
From downstream foundation area:
Yes
N/A
"Boils" beneath stream or ponded water:
Yes
N/A
7.
Cracks or scarps on crest:
Yes
]No
N/A
8.
Cracks or scarps on slope:
Yes
N/A
9.
Sloughing or bulging on slope:
Yes
N/A
10.
*Major erosion problems:
Yes
N/A
11.
Surface movements in valley bottom or on hillside:
5 E'er oy
S,c82 Ye
No
N/A
12.
*Erosion of toe:
Yes
DNo
N/A
13.
*Water impounded against toe:
Yes
N/A
14.
Existing embankment freeboard: (normal
= 6.81)
-v
feet
15.
Increase Decrease in water level:
feet
16.
Cracks, bulging, or erosion on upstream face:
Yes
No
N/A
17.
Visible sumps or sinkholes in slurry surface:
N/A
18.
*Clogging
Spillway channels and pipes:
Yes
N/A
Decant system:
N/A
Diversion ditches:
N/A
19.
*Cracking or crushing of pipes
Spillway pipes:
Yes
N/A
Decant system:
N/A
20.
Trash racks clear and in place:
Yes
No
N/A
21.
Discharge rate (gpm)
—1q—
*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.
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