HYDRO24676

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 5/17/1991
• 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

INSPECTOR'S NAME:
NPDES I.D. NO.:
FACILITY CONFIGUF
SITE NAME:
PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
Dross
MINE NAME: Seneca Nine 11-w IHe
MINE I.D. NO.: CMLRD Permit No.
DATE: 5/7/91
DATE LAST INSPECTION: 2/22/91
LOCATION: N'W;,NW}, Sec.22,T5N,R88W
LOCATION: 8 mi. S of Hayden, CO
OWNER'S REP.: Scott Williams. Suot.
Circle or write in appropriate response
1. foundation preparation (removal of vegetation, stumps, topsoil): _ ~e No N/A
2. Lift thickness: 12 in. N/A
3. Compaction according to approved plan: ~e 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 ®/•
At isolated points on embankment slopes: Yes N/A
At natural hillside: Yes N/A
Over widespread areas: Yes N/A
From downstream foundation area: Yes N N/A
"Boils" beneath stream or ponded water: Yes P;/A
7. Cracks or scarps on crest: Yes N~ N/A
8. Cracks or scarps on slope: Yes ® N/A
9. Sloughing or bulging on slope: ~'e No N/A
10. *Major erosion problems: Yes ® N/A
11. Surface movements in valley bottom or on hillside: Yes No N/A
12. *Erosion of toe: Yes ® N/A
13. *Water impounded against tae: Yes ~ N/A
14. Existing embankment freeboard: 13.6 feet
15. Increase Decrease in water level: - 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 N~
Decant system: Yes F;o
Diversion ditches: Yes No
19. *Cracking or crushing of pipes
Spillway pipes: Yes
Y ((a y~A
}1
Decant system: es o ~,
j
20. Trash racks clear and in place: ~e No N/A
*Major adverse changes in these items could cause instability and should be repo rted t o the
Engineering Manager and Mine Superintendent for further evaluation. Adverse con dition s
noted in these items should normally be described (extent, location, volume, etc .) in the
space on the back of this sheet.