HYDRO22713

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 1/10/1994
• Doc Name: 4th Qtr 1993 Inspections
• From: PEABODY WESTERN
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: 12/29/93
N PDES I.D. NO.: N/A
FACILITY CONFIGURATION: Final Pit Impoundment DATE LAST INSPECTION: 9/21/93
SITE NAME: PeCOCo Reservoir LOCATION: NWdt, Sec. 2, T6N, R87W
MINE NAME: Seneca Mine (Peabody Coal Co.) LOCATION: 7.1 mi. SE of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Scott Williams, Supt.
Circle or write is aDDI'Opr18t@ reSpgn6e
1. Foundation preparation (removal of vegetation, stumps, topsoil: ~Xes No
2. Lift thickness: inches
3. Compaction according to approved plan: Yes No
4. Burning (specify extent and location): Yes No
tom...,
5. Angle of elope (degrees) degrees
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes ENO:
At isolated points on embankment slopes: Yes cClo'_
At natural hillside: Yes ~Ng,
Over widespread areas: Yes ~Np,
From downstream foundation area: Yes LNG
"soils" beneath stream or ponded water: Yes LNO;
7. Cracks or scarps on crest: Yes LNO.
8. Cracks or scarps on slope: Yes ~o.~
9. sloughing or bulging on elope: Yes La
10. ^Major erosion problems: Yes ~)oi
11. Surface movements in valley bottom or on hillside: Yes `o.
12. *Erosion of toe: Yes ~Na'
13. *Water impounded against toe: Yes ` oa
14. Existing embankment freeboard: 5.5 feet
15. Increase Decrease in water level: No change feet
16. cracks, bulging, or erosion on upstream face: Yes `No;
17. Visible sumps or sinkholes in slurry surface: Yes cLo
18. *Clogging
Spillway channels and pipes: Yes ~Na
Decant system: Yes ~yo'
Diversion ditches: Yes ENO
19. *Cracking or crushing of pipes
Spillway pipes: Yes iNO,
Decant system: Yes ~N,9~
20. Trash racks clear and in place: `Yes No
^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.