2013-02-01_HYDROLOGY - C1994082 ‎(2)‎

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 2/1/2013
• Doc Name: 4th Quarter 2012 Sedimentation Pond Inspection Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: JLE
• Email Name: SB1
• Media Type: D
• Archive: No

INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: CO- 0000221 D.P. 013
FACILITY CONFIGURATION: Cross - Valley Pond
SITE NAME: Pond #013
MINE NAME: Yoast Mine(Seneca Coal Co)
MINE I.D. NO.: CMLRD Permit No. C -94 -082
PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
DATE: /0
DATE LAST INSPECTION: 9
LOCATION: SE NW' %,Sec. 19, T5N, R87W
LOCATION: 8.5 mi. SE 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:
3. Compaction according to approved plan:
4. Burning (specify extent and location):
5. Angle of slope: 3:1 upstream, 3:1 downstream
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: N/A
At isolated points on embankment slopes: Yes o N/A
At natural hillside: Yes o N/A
Over widespread areas: Yes o N/A
From downstream foundation area: Yes o N/A
"Boils" beneath stream or ponded water: Yes io N/A
7. Cracks or scarps on crest: Yes io N/A
8. Cracks or scarps on slope: Yes io N/A
9. Sloughing or bulging on slope: Yes N/A
10. *Major erosion problems: 1 Yes N. N/A
11. Surface movements in valley bottom or on hillside: Sete b*(vcJ No N/A
12. *Erosion of toe: Yes o N/A
13. *Water impounded against toe: Yes N N/A
14. Exist ,ing embankment freeboard: (normal = 4') 9.& feet
15. ✓ Increase Decrease in water level: 0.1 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 No N/A
Decant system: N/A
Diversion ditches: Yes No N/A
19. *Cracking or crushing of pipes
Spillway pipes:
Decant system:
20. Trash racks clear and in lace:
21. Discharge rate (gpm) � V' .0._■J 4 r, S e. ie w c. Ls _av C)
is 6 .
No
Total = 6:1
in.
Yes LID N/A
N/A
D No 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,
volumeetc.) in the space on the back of this sheet.
See f s k_63 e_ to k) I�►.v dL s C �q `'� ae.
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