2012-01-13_HYDROLOGY - C1994082 ‎(2)‎

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/13/2012
• Doc Name: 4th Quarter 2011 Sedimentation Pond Inspection
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: SLB
• Email Name: SB1
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: ,C)
NPDES I.D. NO.: CO- 0000221 D.P. 013 l
FACILITY CONFIGURATION: Cross - Valley Pond DATE LAST INSPECTION: _ 0' 11
SITE NAME: Pond #013 LOCATION: SE',, NW%,Sec. 19, TSN, R87W
MINE NAME: Yoast Mine(Seneca Coal Co) LOCATION: 8.5 mi. SE of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C -94 -082 OWNER'S REP.: Roy Karo, Gen Mgr
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes
2. Lift thickness:
3. Compaction according to approved plan:
4. Burning (specify extent and location): No
5. Angle of slope: 3:1 upstream, 3:1 downstream Total = 6:1
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: N/A
At isolated points on embankment slopes: Yes / 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 o 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 N/A
11. Surface movements in valley bottom or on hillside: L,(/ ® N/A
12. *Erosion of toe: I Yes o N/A
13. *Water impounded against toe: Yes No N/A
14. Existing embankment freeboard: (normal = 4') 5,06 eet
15. Increase ✓ Decrease in water level: /.015 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 ED N/A
Decant system: N/A
20. Trash racks clear and in place: No N/A
21. Discharge rate (gpm) D
Circle or write in appropriate response
in.
Yes N/A
N/A
Yes N� 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.
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