HYDRO30934

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 7/8/1996
• Doc Name: 2nd Qtr 1996 Inspections
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Michael Altavilla DATE: 06/05/96
NPDES I.D. NO.: N/A
FACILITY CONFIGURATION: Incised Pond DATE LAST INSPECTION: 03/22/96
SITE NAME: Truck Wash Settling Pond LOCATION: NWY, NEY, Sec 34. T6N. R87W
MINE NAME: Seneca II Mine (Seneca Coal Col LOCATION: 7 mi. SE of Hayden. CO
MINE I.D. NO.: CDMG Permit No. C-80-005 OWNER'S REP.; Brad Brown. Gen Mar
Circle or write in anorooriate resoonae
1. Foundation preparation (removal of vegetation, stumps, topsoil: Ye No N/A
2. Lift thickness: N/A inches
3. Compaction according to approved plan: Yes No
4. Burning (specify extent and location): Yes No N/A
5. Angle of slope: upstream, downstream Total = N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes No
At isolated points on embankment slopes: Yes No
At natural hillside: Yes No A
Over widespread areas: Yes ~ A
From downstream foundation area: Yes o N/A
"Boils" beneath stream or ponded water: Yes o N/A
7. Cracks or scarps on crest: Yes No
8. Cracks or scarps on slope: Yes No
9. Sloughing or bulging on slope: Yes No N/
10. *Major erosion problems: Yes No N/A
11. Surface movements in valley bottom or on hillside: Yes No
12. *Erosion of toe: Yes No
13. *Water impounded against toe: Yes No
14. Existing embankment freeboard: See comments 5.0 feet
15. Increase Decrease in water level: No chance feet
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 '~ N~
Decant system: Yes No ~/A)
Diversion ditches: Yes No IG
19. *Cracking or crushing of pipes
Spillway pipes: Yes /~o~ Nfg
Decant system: Ye ~ o /A
20. Trash racks clear and in place: ~ 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.