HYDRO26126

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 4/14/2006
• Doc Name: 1st Qtr 2006 Inspection Reports
• 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 Impou
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INSPECTOR S NAME: Dennis Jones DATE:
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NPDES I.D. NO.: CO-0000221 D.P. 005
FACILITY CONFIGURATION: Cross-Vallev Pond DATE LAST INSPECTION: I~ b~
SITE NAME: Pond tk005 LOCATION: NW`/, SW~/. Sec. 10, TSN R88W
MINE NAME: Seneca II-W Mine (Seneca Coal Co ) LOCATION: 8 mi. S of Havden, CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Gr ~g Kitchen, Gen Mar
ClrCle Or Wrlte In apprODrlate reaDOnae
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes
2. Lift thickness: 12 in.
3. Compaction according to approved plan: Yes
4. Burning (specify extent and location): No
5. Angle of slope: 3.5:1 upstream, 2.5:1 downstream Total = 6:1
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes o N/A
At isolated points on embankment slopes: Yes No 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 N N/A
10. *Maj or erosion problems: Yes N N/A
11. Surface movements in valley bottom or on hillside: Yes No N/A
12. *Erosion of toe: Yes No N/A
13. *Water impounded against toe: Y
e
s N/A
14. Existing embankment freeboard: (normal = 7.4') ~~
~
~
~-1--L feet
15. Increase _~ Decrease in water level: 3_._._ feet
16. Cracks, bulging, or erosion on upstream face: Yes ~ N/A
17. visible sumps or sinkholes in slurry surface: NSA
18. *Clogging
Spillway channels and pipes: Yes No N/A
Decant system: Yes No N/A
Diversion ditches:
19. *Cracking or crushing of pipes
Spillway pipes: Yes NO N/A
Decant system: Yes No N/A
20. Trash racks clear and in place: Yes No N/A
*Maj or 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.