HYDRO29671

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 7/26/2004
• Doc Name: 2nd Quarter 2004 Sedimentation Pond Inspections
• From: Seneca Coal Company
• To: DMG
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Imyoundment e

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INSPECTOR S NAME: Dennis Sones DATE:
1
NPDES I.D. NO.: CO-0000221 D.P. 008 C1 2J
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FACILITY C ONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: ~ ~ O ~
1
SITE NAME: Pond #008 LOCATION: SW'k NV1'/a, Sec. 7, TSN. R86W
MINE NAME: Seneca II Mine (Seneca Coal Co) LOCATION: 7.1 mi. SE of Hayden CO
MINE I.D. NO.: CMLRD Permit No. C -80-005 OWNER'S REP.: Greaa Kitchen, Gen Mar
Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes
2. Lift thickness: 12
3. Compaction according to approved plan: Yes
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 o
At natural hillside: Yes No
Over widespread areas: Yes No
From downstream foundation area: Yes No
"Boils" beneath stream or ponded water: Yes No
7. Cracks or scarps on crest: Yes No
8. Cracks or scarps on slope: Yes No
9. Sloughing or bulging on slope: Yes No
10. *Maj or erosion problems: Yes No
11. Surface movements in valley bottom or on hillside: Yes ~
12. *Erosion of toe: Yes No
13. *Water impounded against toe: Yes N
14. Existing embankment freeboard: (normal = 8.0') ~ feet
15. Increase Decrease in water level: I,~o c ~o ~~.., feet
16. Cracks, bulging, or erosion on upstream face: ~ Yes No
17. Visible sumps or sinkholes in slurry surface: NL
18. *Clogging
Spillway channels and pipes: Yes ~°
Decant system:
Diversion ditches: N A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes No N/A
Decant system:
20. Trash racks clear and in place: es 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, volume, etc.) in the space on the
back of this sheet.