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: 11/16/93
NPDES I.D. NO.: CO-0000221 D.P. 009
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: 9/21/93
SITE NAME: Pond #009 LOCATION: SEA SW~, Sec. 11, TSN, R88W
MINE NAME: Seneca II-W Mine (Peabody Coal Co.1 LOCATION: 8 mi. S of Havde n, CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Scott Williams, Supt.
Circle or write is appropriate resDOnSe
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 iN/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.JN
At isolated points on embankment slopes: Yes ~No% N/A
At natural hillside: Yes 'Ng N/A
Over widespread areas: Yes ~~ N/A
From downstream foundation area: Yes ~NO~ N/A
"Boils" beneath stream or ponded water: Yes ~ N/A
7. Cracks or scarps on crest: Yes ~NO~ N/A
B. Cracks or scarps on slope: Yes Lo. N/A
9. SLoughing or bulging on slope: Yes QL"o~ N/A
10. *Major erosion problems: Yes L a N/A
11. Surface movements in valley bottom or on hillside: Yes ~NJ N/A
12. *Erosion of toe: Yes Ltyp~ N/A
13. *Water impounded against toe: Yes N$ N/A
14. Existing embankment freeboard: 14.0 feet
15. Increase Decrease in water level: No change feet
16. Cracks, bulging, or erosion on upstream face: Yes CNO~ NJA
17. visible sumps or sinkholes in slurry surface: Yes No <IJ/~
18. *Clogging
Spillway channels and pipes: Yes cNo. N/A
Decant system: Yes No LN/A,
Diversion ditches: Yes No ~~FU
19. *Cracking or crushing of pipes
Spillway pipes: Yes t~IOi NjA
Decant system: Yes No ~N/A;
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.