HYDRO30805

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 10/5/2007
• Doc Name: 3rd Quarter 2007 Inspection Reports
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Imgpoundments
INSPECTOR'S NAME: Dennis Jones DATE: 1-I~'~~
NPDES I.D. NO.: CO -0000221 D.P. 008 L
FACILITY C ONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION:
SITE NAME: Pond #008 LOCATION: SW~~ NW'/. Sec. 7 TSN R8 W
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 Mgr
Circle or write in aoorooriate resconse
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: ~A
At isolated points on embankment slopes: Yes o 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 No 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 No N/A
11. Surface movements in valley bottom or on hillside: Yes N/A
12. *Erosion of toe: Yes No N/A
13. *Water impounded against toe: Y
e s N N/A
14. Existing embankment freeboard: (normal = 4.7') c
/
'
~.t feet
15. Increase Decrease in water level: Itio c~a y~¢ feet
16. Cracks, bulging, or erosion on upstream face: Yes No N/A
17. Visible sumps or sinkholes in slurry surface: 1A
18. *Clogging
Spillway channels and pipes: Yes ~ N/A
Decant system:
Diversion ditches: N A
19. *Cracking or crushing of pipes
Spillway pipes: Yes No N/A
Decant system:
20. Trash racks Clear and in place: Yes No N/A
21. Discharge rate (gpm) ~_~
*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.