HYDRO23885

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 1/13/1994
• Doc Name: QUARTERLY 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

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: 12/20/93
C]pDES I.D. NO.: CO-0000221 D.P. 006
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: 9/21/93
SITE NAME: Pond X006 LOCATION: NWT NWT, Sec. 22. T6N, R88W
MINE NAME: Seneca II-W Mine (Peabody Coal Co.l LOCATION: 8 mi. S of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Scott Williams, Supt.
Circle Or Write lO eDPiODrlate re5DOa5e
1. Foundation preparation (removal of vegetation, stumps, topsoil: `Yes 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 elopes: Yes (NoJ N/A
At natural hillside: Yea LNn, N/A
Over widespread areas: Yes LNo'. N/A
From downstream foundation area: Yes poi N/A
"Boils" beneath stream or ponded water: Yes poi N/A
7. Cracks or scarps on crest: Yes ,No, NJA
8. Cracks or scarps on slope: `Yeses No N/A
9. Sloughing or bulging on elope: Yes ~Np. C7/A
10. *Major erosion problems: Yes c~J N/A
11. Surface movements in valley bottom or on hillside: Yes ~Ng~ N/A
12. +Erosion of toe: Yes ~NOi N/A
13. "Water impounded against toe: Yes No N/A
14. Existing embankment freeboard: 14.4 feet
15. Increase X Decrease in water level: 0.35 feet
16. Cracks, bulging, or erosion on upstream face: `~es~ 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 No iNjA-'
Diversion ditches: Yes No ~NL~
19. *Cracking or crushing of pipes
Spillway pipes: Yes ~flo~ N/A
Decant system: Yes No LN/y
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 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.