2012-01-13_HYDROLOGY - C1980005 ‎(3)‎

• Permit No: C1980005
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/13/2012
• Doc Name: 3rd Quarter 2011 Sedimentation Pond Inspection
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: JDM
• Media Type: D
• Archive: No

PERIODIC
Water, Sediment,
INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: CO- 0000221 D.P. 008
FACILITY CONFIGURATION: Cross - Valley Pond
SITE NAME: Pond #008
MINE NAME: Seneca II Mine (Seneca Coal Co)
MINE I.D. NO.: CMLRD Permit No. C -80 -005
1.
2.
3.
4.
5.
6.
INSPECTION FORM
or Slurry Impoundments
DATE: c t' 5 - `
Circle or write in appropriate response
DATE LAST INSPECTION:
LOCATION: SW'% NW' %, Sec.
LOCATION: 7.1 mi. SE of
OWNER'S REP.: Roy Karo,
Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 3:1 upstream, 3:1 downstream
*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:
Yes
12
Yes
No
Total = 6:1
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 N N/A
11. Surface movements in valley bottom or on hillside: See- o"lGw Sicf)..0 No N/A
12. *Erosion of toe: Yes m N/A
13. *Water impounded against toe: Yes ®. N/A
14. Existing embankment freeboard: (normal = 4.7') X1.7 feet
15. Increase / Decrease in water level: 0-S feet
16. Cracks, bulging, or erosion on upstream face: Yes N/A
17. Visible sumps or sinkholes in slurry surface: N/A
18. *Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
19. *Cracking or crushing of pipes
Spillway pipes: Yes No N/A
Decant system: N/A
r--20. Trash racks clear and in place: Yes OD N/A
21. Discharge rate (gpm) 3
( (.
7, T5N, R86W
Hayden, CO
Gen Mgr
N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes (Nd 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.