HYDRO30147

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 10/13/1995
• Doc Name: 3rd Qtr 1995 Inspections
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

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PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Rov Karo DATE: 09/25/95
NPDES I.D. NO.: N/A
FACILITY CONFIGURATION: _Lncised Pond DATE LAST INSPECTION: 06/28/95
SITE NAME: Truck Wash Suooly Pond LOCATION: NW Y.. NEST, 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-80-005 OWNER'S REP.: Scott Williams. Gen Mar
Circle or write in anorooriate reaoonae
1. Foundation preparation (removal of vegetation, stumps, topsoil: ~ No N/A
2. Lift thickness: 12 inc hes
3. Compaction according to approved plan: es No N/A
9. Burning (specify extent and location): Yes No
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
At isolated points on embankment slopes: Yes N/A
At natural hillside: Yes o N/A
Over widespread areas: Yes N/A
From downstream foundation area: Yes 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. *Maj or 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 o N/A
14. Existing embankment freeboard: See comments 3.0 feet
15. Increase X Decrease in water level: 0.5 feet
16. Cracks, bulging, or erosion on upstream face: Yes ® N A
17. Visible sumps or sinkholes in slurry surface: Yes No N/
18. *Clogginq
Spillway channels and pipes: Yes Q° N A
Decant system: Yes No /
Diversion ditches: Yes 0° N A
19. *Cracking or crushing of pipes
Spillway pipes: Yes Q N/A
Decant system: Yes No
20. Trash racks clear and in place: Yes No /A
*Maj or 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.