HYDRO22103

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 3/8/1991
• Doc Name: QTRLY SEDIMENTATION POND INSPECTIONS SENECA II-W MINE
• From: PEABODY COAL CO WESTERN DIV
• To: MLRD
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: DATE: 2/22/91
NPDES I.D. NO.: C - 0 D.P. 006 10/20/90
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION:
SITE NAME: Pond #006 LOCATION: NWa,NW,--, Sec.22,T5N,R88W
MINE NAME: Seneca Mine II-W Peabody Coa Co LOCATION: 8 mi. S of Hayden, C
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Scott Williams. Supt.
Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil): _ ~ No N/A
2. Lift thickness: 12 in. N/A
3. Compaction according to approved plan: ~ 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 /
At isolated points on embankment slopes: Yes A
At natural hillside: Yes N/A
Over widespread areas: Yes N/A
From downstream foundation area: Yes N/A
"Boils" beneath stream or ponded water: Yes Pl/A
7. Cracks or scarps on crest: Yes ~ N/A
8. Cracks or scarps on slope: Yes ® N/A
9. Sloughing or bulging on slope: Yes ® N/A
10. *Major erosion problems: Yes ® N/A
11. Surface movements in valley bottom or on hillside: Yes ~ N/A
12. *Erosion of toe: Yes ® N/A
13. *Water impounded against toe: Yes ® N/A
14. Existing embankment freeboard: 1~_6 feet
15. X Increase Decrease in water level: 0.5 feet
16. Cracks, bulging, or erosion on upstream face: Yes ® N/A
17. Visible sumps or sinkholes in slurry surface: Yes ® N/A
18. *Clogging
Spillway channels and pipes: Yes
Decant system: Yes No
Diversion ditches: Yes No
19. *Cracking or crushing of pipes
Spillway pipes: Yes N A
Decant system: Yes o !~/
20. Trash racks clear and in place: ®e No N/A
*Major adverse changes in these items could cause instability and should be reported t o the
Engi neering Manager and Mine Superintendent for further evaluation. Adverse condition s
noted in these items should normally be described (extent, location, volume, etc. ) in the
space on the back of this sheet.