HYDRO20385

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 9/19/1991
• 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: Ron Gehrke
NPDES I.D. NO.: CO-0000221 D.P. 006
FACILITY CONFIGURATION: Cross-Valle Pond
SITE NAME: Pond #00
MINE NAME: Seneca Mine II-W Pea ody Coa Co
MINE I.D. NO.: CMLRD Permit No. C-82-057
DATE: 08/01/91
DATE LAST INSPECTION: 0 07 91
LOCATION: NWa,NW3, Sec.22, 5N,R88W
LOCATION: 8 mi. S of Hayden, C
OWNER'S REP.: Scott Williams. Suot.
Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil): _ es 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 ® 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/
At isolated points on embankment slopes: Yes A
At natural hillside: Yes N/A
Over widespread areas: Yes o N/A
From downstream foundation area: -- ~ Yes o N/A
_ "Boils" beneath stream or ponded water: Yes N/A
7. Cracks or scarps on crest: Yes No N/A
8. Cracks or scarps on slope: Yes ~ N/A
9. Sloughing or bulging on slope: Yes ©o N/A
10. *Major erosion problems: ~ Yes ® N/A
11. Surface movements in valley bottom or on hillside: es No N/A
12. *Erosion of toe: Yes 0 N/A
13. *Water impounded against toe: Yes 0 N/A
14. Existing embankment freeboard: 14.6 feet
15. Increase X Decrease in water level: 1.0 feet
16. Cracks, bulging, or erosion on upstream face: Yes No N/A
17. Visible sumps or sinkholes in slurry surface: Yes ~ N/A
18. *Clogging
Spillway channels and pipes: Yes ©o
Decant system: Yes h;o
Diversion ditches: Yes No
19. *Cracking or crushing of pipes
Spillway pipes: Yes No N
Decant system: Yes o
20. Trash racks clear and in place: Yes No N/A
*Major adverse changes in these items could cause instability and sho uld be reported t o the
Engineering 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.