HYDRO20217

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 10/6/1992
• Doc Name: QTRLY SEDIMENTATION POND INSPECTIONS SENECA II-W MINE
• From: PEABODY WESTERN
• 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: Tom Wainwright
NPDES I.D. NO.: CO-0000221 D.P. 006
FACILITY CONFIGURATION: Cross-Valley Pond
SITE NAME: Pond #005
MINE NAME: Seneca Mine II-W Peabody Coal Co
MINE I.D. NO.: CMLRD Permit No. C-82-057
DATE: 09/23/92
DATE LAST INSPECTION: New Pond
LOCATION: NWV. SW'/~, SEC 10, T5N, R88W
LOCATION: 8 mi. S of Hayden, CO
OWNER'S REP.: Scott Williams. Supt.
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: Yes No N/A
4. Burning (specify extent and location): Yes No N/A
5. Angle of slope: 3.5 upstream, 2.5 downstream Total = 6:1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes No N/A
At isolated points on embankment slopes: Yes o N/A
At natural hillside: Yes to N/A
Over widespread areas: Yes o N/A
From downstream foundation area: Yes N/A
"Boils" beneath stream or ponded water: Yes o Pl/A
7. Cracks or scarps on crest: Yes l~ N/A
8. Cracks or scarps on slope: Yes ~ N/A
9. Sloughing or bulging on slope: Yes to N/A
10. *Major erosion problems: Yes Qo N/A
11. Surface movements in valley bottom or on hillside: Yes ©o N/A
12. *Erosion of toe: Yes ©o N/A
13. *Water impounded against toe: Yes !® N/A
14. Existing embankment freeboard: 22.6 fee t
15. Increase Decrease in water level: See Gomment_c fee t
16. Cracks, bulging, or erosion on upstream face: Yes ® N/A
17. Visible sumps or sinkholes in slurry surface: Yes No N/A
18. *Clogging
Spillway channels and pipes: Yes Qo N A
Decant system: Yes No A
Diversion ditches: Yes No N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes
Decant system: Yes No N/A
20. Trash racks clear and in place: Yes No N/A
*P?ajor adverse changes in these items could cause instability and should be reported to the
Engi neering Manager and Mine Superintendent for further evaluation. Adverse conditio ns
noted in these items should normally be described (extent, location, volu me, etc. ) in the
space on the back of this sheet.