HYDRO29584

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 6/21/1993
• Doc Name: QTRLY SEDIMENTATION POND INSPECTIONS SENECA II-W MINE
• From: PEABODY WESTERN COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Tom Wainwright DATE: 06/10/93
NPDES I.D. NO.: CO-0000221 D.P. 005
FACILITY CONFIGURATION: Croee-Valley Pond DATE LAST INSPECTION: 03/18/93
SITE NAME: Pond 4005 LOCATION: NWT SW~, Sec. 10, TSN, R88W
MINE NAME: Seneca II-W Mine !Peabody Coal Co.1 LOCATION: 8 mi. S of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Scott Williams, Suot.
Circle or write in eoorooriate resvonse
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yee No N/A
2. Lift thickness: 12 in. N/A
3. Compaction according to approved plan: ~1'~ No N/A
4. Burning (specify extent and location): Yee No m
5. Angle of elope: 3.4 upstream, 2.5 downstream Total 6.1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yee N
o N/A
At isolated points on embankment elopes: ee ~
N
~)
~ N/A
At natural hillside: Yee C~ N/A
Over widespread areas: Yee GN2'~ N/A
From downstream foundation area: Yee ~ N/A
"Boils" beneath stream or ponded water: Yee No N/A
7. Cracks or scarps on crest: Yes No N/
8. Cracks or scarps on elope: Yee No ~~
9. Sloughing or bulging on elope: Yee ~ N/A
10. *Major erosion problems: Yee ~~ N/A
11. Surface movements in valley bottom or on hillside: Yes No N/A
12. *Eroeion of toe: Yee ~ N/A
13. *Water impounded against toe: Yee No N/A
14. Existing embankment freeboard: 19.6 feet
15. X Increase Decrease in water level: See comments 2 feet
16. Cracks, bulging, or erosion on upstream face: Yee ~ N/A
17. Visible sumps or sinkholes in slurry surface: Yee No ~N/~
18. *Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
19. *Cracking or crushing of pipes
Spillway pipes:
Decant system:
20. Trash racks clear and in place:
Yee
Yee No
Yee No N A
Yee ~Igi ~N/A
Yee No cs:i~'
Yes No N/A
*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 apace on
the back of this sheet.