HYDRO30755

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 12/31/1992
• Doc Name: QTRLY SEDIMENTATION POND INSPECTIONS SENECA II-W MINE
• From: PEABODY WESTERN COAL CO
• To: MLRD
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Janes
NPDES I.D. NO.: C -0000 21 D.P. 006
FACILITY CONFIGURATION: Cross-Valley Pond
SITE NAME: Pond #006
MINE NAME: Seneca Mine I -W Pea ody Coa Co
MINE I.D. NO.: CMLRD Permit No. C-82-057
GATE: 12/07/92
DATE LAST INSPECTION: 09/23/92
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): _ es No N/A
2. Lift thickness: 12 in. N/A
3. Compaction according to approved plan: Yes No N/A
4. Burning (specify extent and location): Yes No 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 N/A
At isolated points on embankment slopes: Yes ~ N/A
At natural hillside: Yes N/A
Over widespread areas: Yes N N/A
From downstream foundation area: Yes N/A
"Boils" beneath stream or ponded water: Yes No PJ/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/A
10. *Major erosion problems: Yes No 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: Yes ® N/A
14. Existing embankment freeboard: 11,1 feet
15. Increase Decrease in water level: Same fee t
16. Cracks, bulging, or erosion on upstream face: Yes No N/A
17. Visible sumps or sinkholes in slurry surface: Yes No N/A
18. *Clogging
Spillway channels and pipes: Yes No N/A
Decant system: Yes PJo V A~
Diversion ditches: Yes No A
19. *Cracking or crushing of pipes
Spillway pipes: Yes No N/A
Decant system: Yes No
20. Trash racks clear and in place: Yes No N/A
*Major adverse changes in these items could cause instability and should be reported to the
Engineering Manager end 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.