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 Wainwright
NPDES I.D. NO.: CO-0000221 D.P. 006
FACILITY CONFIGURATION: Cross-Valley P`b8d
SITE NAME: Pond #006
MINE NAME: Seneca Mine II-W Peabo y Coa o
MINE I.D. NO.: CMLRD Permit No. C-82-057
GATE: 09!23!92
DATE LAST INSPECTION: 05/07/92
LOCATION: NW},NW}, Sec.22,T5N,R88W
LOCATION: 8 mi. S of Hayden, CO
OWNER'S REP.: Scott Williams. Suot.
Circle or write in appropriate response

1. Foundation preparation (removal of vegetation, stumps, topsoil): _ Yes No NIA
2. Lift thickness: 12 in. N/A
3. Compaction according to approved plan: es No N/A
4. Burning (specify extent and location): Yes ~ N/A
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
At isolated points on embankment slopes: Yes N/A
At natural hillside: Yes N N/A
Over widespread areas: Yes o N/A
From downstream foundation area: Yes N/A
"boils" beneath stream or ponded water: Ves N/A
7. Cracks or scarps on crest: Yes ® N/A
8. Cracks or scarps on slope: Yes Q 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: Ye No N/A
12. *Erosion of toe: Yes ©o N/A
13. *Water impounded against toe: Yes No N/A
14. Existing embankment freeboard: 11.1 feet
15. Increase Decrease in water level: Same feet
16. Cracks, bulging, or erosion on upstream face: Yes No N/A
17. Visible sumps or sinkholes in slurry surface: Yes ©o N/A
18. *Clogging
Spillway channels and pipes: Yes ® N A
Decant system: Yes No
Diversion ditches: Yes No N/
19. *Cracking or crushing of pipes
Spillway pipes: Yes !o
Decant system: Yes No
20. Trash racks clear and in place: es No N/A
*Major adverse changes in these items could cause instability and sho uld be reported to the
Engineering Manager and Mine Superintendent far 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.