HYDRO20217

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 10/6/1992
• Doc Name: QTRLY SEDIMENTATION POND INSPECTIONS SENECA II-W MINE
• From: PEABODY WESTERN
• To: MLRD
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

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PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Tom Wainwrioht DATE: 09/23/92
NPDES I.D. NO.: CO-0000221 D.P. 006
FACILITY CONFIGURATION: Cross-Valley-P~nd DATE LAST INSPECTION: New Pond
SITE NAME: Pond .#009 LOCATION: SE'/~ SW'/. Sec 11, T5 N, R88W
MINE NAME: Seneca Mine II-W Peabody Coa Co LOCATION: 8 mi. S of Hayden, C
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Scott Williams. Suot.

Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil): _ es No N/A
2. Lift thickness: 12 in. N/A
3. Compaction according to approved plan: es No N/A
4. Burning (specify extent and location): Yes No U
5. Angle of slope: 3:1 upstream, 3:1 downstream Total = 6:1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes No N/
At isolated paints on embankment slopes: Yes ®o N/A
At natural hillside: Yes ® N/A
Over widespread areas: Yes ~ N/A
From downstream foundation area: Yes ~o~ N/A
"Boils" beneath stream or ponded water: Yes ~ Pl/A
7. Cracks or scarps on crest: Yes ®o N/A
8. Cracks or scarps on slope: Yes ®o N/A
9. Sloughing or bulging on slope: Yes to N/A
10. *Major erosion problems: Yes ® N/A
11. Surface movements in valley bottom or on hillside: Yes ~o N/A
12. *Erosion of toe: Yes l~ N/A
13. *Water impounded against toe: Yes No N/A
14. Existing embankment freeboard: 20.2 feet
15. Increase Decrease in water level: See comments feet
16. Cracks, bulging, or erosion on upstream face: Yes !o N/A
17. Visible sumps or sinkholes in slurry surface: Yes ~o N/A
18. *Clogging
Spillway channels and pipes: Yes No N A
Decant system: Yes No /
Diversion ditches: Yes No /A
19. *Cracking or crushing of pipes
Spillway pipes: Yes ©o NLA
Decant system: Yes No ~/
20. Trash racks clear and in place: es No N/A
*Flajor adverse changes in these items could cause instability and should be repor ted t o the
Engineering Manager and Mine Superintendent for further evaluation. Adverse condition s
noted in these items should normally be described (extent, location, volume, etc. ) in the
space on the back of this sheet.