HYDRO23207

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 10/21/1994
• Doc Name: 3rd Qtr 1994 Inspections
• From: PEABODY WESTERN
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sedimeat, or Slurrp Impoundmeats
INSPECTOR'S NAME: Hichael G. Altavilla DATE: 09/22/94
NPDES I.D. NO.: N/A
FACILITY CONFIGURATION: Final Pit Impoundment DATE LAST INSPECTION: 06/07/94
SITE NAME: PeCoCo Reservoir LOCATION: NW~t, Sec. 2, T6N, R87W
MINE NAME: Seneca Mine (Peabody Coal Co.l 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 wrlt0 la apptOprlate reapOpae
1. Foundation preparation (removal of vegetation, stumps, topsoil: ea ~ No
2. Lift thickness: inches
3. Compaction according to approved plan: esi No
4. Burning (specify extent and location): Yes QJo~
5. Angle of elope (degrees) degrees
6. *seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes mLo~
At isolated points on embankment slopes: Yes CNo~
At natural hillside: Yes @o.
Over widespread areas: Yes Qlo;
From downstream foundation area: Yes ~
"Boils" beneath stream or ponded water: Yes Q1oJ
7. Cracks or scarps on crest: Yee I~1`o„
8. Cracks or scarps on slope: Yes <.Dio~'
9. Sloughing or bulging on elope: Yes QlJ
30. *Major erosion problems: Yes No~~
11. Surface movements in valley bottom or on hillside: Yes LN~
12. *Erosion of toe: Yes ~,
13. *Water impounded against toe: Yes ~J
14. Existing embankment freeboard: 6.0 feet
15. X Increaee Decrease in water level: 0.5 feet
16. Cracks, bulging, or erosion on upstream face: Yes No
17. Visible eumpe or sinkholes in slurry surface: Yes
18. *Clogging
Spillway channels and pipes: Yes No
Decant system: Yes
Diversion ditches: Yes
19. *Cracking or crushing of pipes
Spillway pipes: Yes ~lo~.
Decant eyetem: Yes C~1~
20. Trash racks clear and in place: ear 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.