HYDRO31096

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 4/8/1996
• Doc Name: 1st Qtr 1996 Inspections
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC IN9PfiCTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Michael Altavilla DATE: 03/22/96
NPDES I.D. NO.: N/A
FACILITY CONFIGURATION: _Sncised Pond DATE LAST INSPECTION: 12/09/95
SITE NAME: Truck Wash Suooly Pond LOCATION: NWy. NEy. Sec 34. T6N. R87W
MINE NAME: Seneca Mine II (Seneca Coal Co) LOCATION: 7 mi. SE of Hayden. CO
MINE I.D. NO.: CDMG Permit No. C-SO-005 OWNER'S REP.: Brad_Brown, Gen Mar
Circle or write in aonrooriate resoonsa
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes No N/A
2. Lift thickness: ~~ inches
3. Compaction according to approved plan: es No N/A
4. Burning (specify extent and location): Yes No /A
5. Angle of slope: 2:1 upstream, 2:1 downstream Total = 4:1
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes No A
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 o N/A
7. Cracks or scarps on crest: Yes o N/A
8. Cracks or scarps on slope: Yes o N/A
9. Sloughing or bulging on slope: Yes o N/A
10. *Major erosion problems: Yes o 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: See comments 2.5 feet
15. X Increase Decrease in water level: 0.5 feet
16. Cracks, bulging, or erosion on upstream face: Yes N® N/A
17. Visible sumps or sinkholes in slurry surface: Yes No ',h!_~Y~
18. *Clogging
Spillway channels and pipes: Yes ~~rvo/
Decant system: Yes ` /
Diversion ditches: Yes ©
o A
19. *Crackinq or crushing of pipes
Spillway pipes: Yes ©o N A
Decant system: Yes No /
20. Trash racks clear and in place: Yes No N/
*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.