HYDRO27955

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 6/10/1992
• 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

Y
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-Valley `Pond
SITE NAME: Pond #006
MINE NAME: Seneca Mine II-W Pea ody Coa o
MINE I.D. NO.: CMLRD Permit No. C-82-057
DATE: 05/27/92
DATE LAST INSPECTION: 03/18/92
LOCATION: N'W;,NW;, Sec.22,T5N,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): _ Yes No N/A
2. Lift thickness: 12 in. N/A
3. Compaction according to approved plan: es 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 /A
At isolated points on embankment slopes: Yes No N/A
At natural hillside: Yes Jo N/A
Over widespread areas: Yes No N/A
From downstream foundation area: Yes o N/A
"Boils" beneath stream or ponded water: Yes o PJ/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 No 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 No N/A
13. *Water impounded against toe: Yes No N/A
14. Existing embankment freeboard: 11.1 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 No N/A
18. *Clogging
Spillway channels and pipes: Yes ® N A
Decant system: Yes h!o N
Diversion ditches: Yes No N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes Qo
Decant system: Yes No Cfy~g~
20. Trash racks clear and in place: Ye 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.