2012-08-30_HYDROLOGY - C1982057 ‎(2)‎

• Permit No: C1982057
• IBM Index Class Name: HYDROLOGY
• Doc Date: 8/30/2012
• Doc Name: 2nd Quarter 2012 Sedimentation Ponds
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: SLB
• Email Name: SB1
• Media Type: D
• Archive: No

INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: CO- 0000221 D.P. 005
FACILITY CONFIGURATION: Cross - Valley Pond
SITE NAME: Pond #005
MINE NAME: Seneca II -W Mine (Seneca Coal Co)
MINE I.D. NO.: CMLRD Permit No. C -82 -057
PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
DATE: 6 -( lZ
DATE LAST INSPECTION: 1- LI -
Circle or write in appropriate response
LOCATION: NW SW %, Sec. 10, T5N, R88W
LOCATION: 8 mi. S of Hayden, CO
OWNER'S REP.: Roy Karo, Gen Mgr
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: 3.5:1 upstream, 2.5:1 downstream
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: O.J. 1 cc.y f w.
At isolated points on embankment slopes:
At natural hillside:
Over widespread areas:
From downstream foundation area: See b e.ot)
"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:
15. Increase V 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: Inoperable
20. Trash racks clear and in place:
21. Discharge rate (gpm)
(normal = 7.4') c(tI
Yes
12 in.
Yes
No
Total = 6:1
No N/A
Yes ' N/A
Yes No N/A
Yes ` N / N/A
Ce1 No N/A
Yes 7801 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 t./ N/A
feet i) .,
Z feet (0
Yes N/A
N/A
Yes N N/A
Inoperable Yes No N/A
N/A
Yes Qo N/A
Yes No N/A
f No N/A
D
*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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