HYDRO28200

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 9/4/2001
• Doc Name: 2nd Qtr 2001 Inspections
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
mater, Sediment, or Slurry Imyoundmenta
INSPECTOR'S NAME: Dennis Jones DATE: 06/25/01
NPDES I.D. NO.: CO-0000221 D.P. 003
FACILITY CONFIGURATION: Diked Pond DATE LAST INSPECTION: 03/30/01
SITE NAME: Northwest Impoundment H003 LOCATION: SEW SNP/. Sec. 27 T6N, R87W
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.: Gregg Kitchen Gen Mar
Circle or arite in aDyrooriate resoont~e
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes No N/A
2. Lift thickness: 12 in. N/A
3. Compaction according to approved plan: Yes No N/A
4. Burning (specify extent and location): Yes No N/A
5. Angle of slope: 2:1 upstream, 3:1 downstream Total = ~1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes No NL
At isolated points on embankment slopes: Yes ® N/A
At natural hillside: Yes N/A
Over widespread areas: Yes o N/A
From downstream foundation area: Yes o N/A
"Boils" beneath stream or ponded water: Yes o N/A
7. Cracks or scarps on crest: Yes No N/A
9. Cracks or scarps on slope: Yes o N/A
9. Sloughing or bulging on slope: Yes o N/A
10. *Major erosion problems: Yes o N/A
11. Surface movements in valley bottom or on hillside: Yes N N/A
12. *Erosion of toe: Yes N N/A
13. *Water impounded against toe: Yes No N/A
14. Existing embankment freeboard: (normal = 9.9'1 4.9 feet
15. Increase Decrease in water level: No chance feet
16. Cracks, bulging, or erosion on upstream face: Yes No N/A
17. Visible sumps or sinkholes in slurry surface: Yes No NL
18. *Clogging
Spillway channels and pipes: Yes No N/A
Decant system: Yes No
Diversion ditches: Yes No N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes No N/A
Decant system: Yes No NL
20. Trash racks clear and in place: _ Yes 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.