HYDRO24106

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 4/14/1995
• Doc Name: 1st Qtr 1995 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 91urry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: 03/2/95
NPDES I.D. NO.: CO-0000221 D. P. 003
FACILITY CONFIGURATION: Diked Pond DATE LAST INSPECTION: 12/09/94
SITE NAME: Northwest Imooundment #003 LOCATION: SEY. SW~:. Sec. 27. TEN. R87W
MINE NAME: Seneca II Mine (Seneca Coal Co) LOCATION: 7.1 mi. SE of Hayden. CO
MINE I.D. NO.: CMLRD Permit No. C-80-005 OWNER'S REP.: Scott Williams. Gen Mor
Circle or write_in annroDriate reeoonae
1. Foundation preparation (removal of vegetation, stumps, topsoil: es No N/A
2. Lift thickness: ~2 in. .N/A
3. Compaction according to approved plan: es No N/A
4. Burning (specify extent and location): ~ es No N/A
5. Angle of slope: 2:1 upstream, ~ 3:1 downstream Total = 5:1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes NQ N/A
At isolated points on embankment slopes: Yes `~N~
At natural hillside: Yes ,7~ N/A
Over widespread areas: Yes o N/A
From downstream foundation area: Yes 'N N/A
"Boils" beneath stream or ponded water: Yes N/A
7. Cracks or scarps on crest: Yes N/A
8. Cracks or scarps on slope: Yes o N/A
9. Sloughing or bulging on slope: Yes N/A
10. *Maj or erosion problems: Yes N/A
11. Surface movements in valley bottom or on hillside: Yes N N/A
12. *Erosion of toe: Yes o N/A
13. *Water impounded against toe: Yes No N/A
14. Existing embankment freeboard: See comments 4.8 feet
15. Increase Decrease in water level: No chance feet
16. Cracks, bulging, or erosion on upstream face: Yes to N/A
17. Visible sumps or sinkholes in slurry surface: Yes No /A
18. *Clogging
Spillway channels and pipes: Yes No
Decant system: Yes No
Diversion ditches: Yes do N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes ~ IJ,~A
Decant system: Yes No ~j y
20. Trash racks clear and in place: es 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.