2009-10-29_HYDROLOGY - C1980005 ‎(2)‎

• Permit No: C1980005
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/29/2009
• Doc Name: 3rd Quarter 2009 Sedimentation Pond Inspection
• From: Seneca Coal Company
• To: DRMS
• Email Name: DTM
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: N/A
FACILITY CONFIGURATION: Incised Pond
SITE NAME: Truck Wash Settling Pond
MINE NAME: Seneca II Mine (Seneca Coal
MINE I.D. NO.: CDMG Permit No. C-80-005
DATE : 0o - ,ato 1 D'_
DATE LAST INSPECTION: G' IS-0 L
LOCATION: NWV44 NEY44, Sec. 34, T6N, R87W
LOCATION: 7.1 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:
N/A
inches
3. Compaction according to approved plan: N/A
4. Burning (specify extent and location): N/A
5. Angle of slope: upstream, downstream Total = N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: N/A
At isolated points on embankment slopes: N/A
At natural hillside: N/A
Over widespread areas: N/A
From downstream foundation area: N/A
"Boils" beneath stream or ponded water: Yes (D N/A
7. Cracks or scarps on crest: N/A
8. Cracks or scarps on slope: N/A
9. Sloughing or bulging on slope: N/A

10. *Major erosion problems: Yes No N/A
11. Surface movements in valley bottom or on hillside: N/A
12. *Erosion of toe: N/A
13. *Water impounded against toe: N/A
14. Existing embankment freeboard: (normal = 5.0') ` feet
15. Increase Decrease in water level: feet
16. Cracks, bulging, or erosion on upstream face: 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: N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes Q N/A
Decant system: N/A
20. Trash racks clear and in place: Yes No N/A
21. Discharge rate (gpm)
Cc)
*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.