2014-04-03_HYDROLOGY - C1982057

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 4/3/2014
• Doc Name: 1st Quarter 2014 Sedimentation Inspection Reports ‎(emailed)‎
• 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
12
Water, Sediment,
or Slurry Impoundments
Yes
INSPECTOR'S NAME: Chris Miller
DATE:
NPDES I.D. NO.: CO- 0000221 D.P. 017
_3/20/14
Yes
FACILITY CONFIGURATION: Cross - Valley Pond
DATE LAST INSPECTION:
Yes
No
SITE NAME: Pond #017
LOCATION: SW1 /, NEB/., Sec.
_11/7/13
34,
TSN, R88W
MINE NAME: Seneca II -W Mine (Seneca Coal Co)
LOCATION: 8 mi. S of Hayden,
N/A
CO
MINE I.D. NO.: CMLRD Permit No. C -82 -057
OWNER'S REP.: Roy Karo,
Gen
Mar
Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil:
2. Lift thickness:
3. Compaction according to approved plan:
4. Burning (specify extent and location):
5. Angle of slope: 3:1 upstream, 3:1 downstream Total =
6. *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: see below
"Boils" beneath stream or ponded water:
7. Cracks or scarps on crest:
8. Cracks or scarps on slope:
9. Sloughing or bulging on slope:
10. *Major erosion problems:
11. Surface movements in valley bottom or on hillside:
12. *Erosion of toe:
13. *Water impounded against toe:
14. Existing embankment freeboard: (normal = 3.11)
15. Increase Decrease in water level:
16. Cracks, bulging, or erosion on upstream face:
17. Visible sumps or sinkholes in slurry surface:
18. *Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
19. *Cracking or crushing of pipes
Spillway pipes:
Decant system:
20. Trash racks clear and in place:
21. Discharge rate (gpm)
Yes
12
in.
Yes
No
6.1
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
No
N/A
Yes
No
N/A
Yes
No
N/A
Yes
No
N/A
Yes
No
N/A
Yes
No
N/A
3.1
feet
0
feet
Yes
No
N/A
Yes
No
N/A
N/A
Yes
No
N/A
N/A
Yes
No
N/A
29.2
*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.
6- Muddy area at south side of dam toe. Has existed for years and appears not to be a
problem.