2013-12-12_HYDROLOGY - C1982057

• Permit No: C1982057
• IBM Index Class Name: HYDROLOGY
• Doc Date: 12/12/2013
• Doc Name: 4th Quarter 2013 Sedimentation Pond Inspection
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: JHB
• Email Name: DIH
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Chris Miller
NPDES I.D. NO.: CO- 0000221 D.P. 005
FACILITY CONFIGURATION: Cross - Valley Pond
SITE NAME: Pond 4005
MINE NAME: Seneca II -W Mine (Seneca Coal Cc)
MINE I.D. NO.: CMLRD Permit No. C -82 -057
DATE: 11 -7 -13
DATE LAST INSPECTION: 9 -5 -13
LOCATION: NWl /, SWl /,, Sec. 10, 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:
12in.
3.
Compaction according to approved plan:
Yes
4.
Burning (specify extent and location):
No
S.
Angle of slope: 3.5 :1 upstream, 2.5:1 downstream Total =
6:1
6.
*Seepage (specify location, color, and approximate volume)
From underdrain pipes: wet, no flow from pipe
Yes
No
N/A
At isolated points on embankment slopes:
Yes
No
N/A
At natural hillside:
Yes
No
N/A
Over widespread areas:
Yes
No
N/A
From downstream foundation area:
Yes
No
N/A
"Boils" beneath stream or ponded water:
Yes
No
N/A
7.
Cracks or scarps on crest:
Yes
No
N/A
8.
Cracks or scarps on slope:
Yes
No
N/A
9.
Sloughing or bulging on slope:
Yes
No
N/A
10.
*Major erosion problems:
Yes
No
N/A
11.
Surface movements in valley bottom or on hillside:
Yes
No
N/A
12.
*Erosion of toe:
Yes
No
N/A
13.
*Water impounded against toe:
Yes
No
N/A
14.
Existing embankment freeboard: (normal = 7.41)
10.4
feet
15.
Increase Decrease in water level: no change
0.0
feet
16.
Cracks, bulging, or erosion on upstream face:
Yes
No
N/A
17.
Visible sumps or sinkholes in slurry surface:
Yes
No
N/A
18.
*Clogging
Spillway channels and pipes:
Yes
No
N/A
Decant system: Inoperable
Yw
^T= �=N/A.
Diversion ditches:
Yes
No
N/A
19.
*Cracking or crushing of pipes
Spillway pipes:
Yes
No
N/A
Decant system: Inoperable
Yep
*NQ
N/A
20.
Trash racks clear and in place:
Yes
No
N/A
21.
Discharge rate (gpm)
0.0
*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