HYDRO20471

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 7/17/1995
• Doc Name: QUARTERLY SEDIMENTATION POND INSPECTIONS SENECA II-W MINE
• 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 /28/95
NPDES I.D. NO.: CO-0000221 D. P. 009
FACILITY C ONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: 03/06 /95
SITE NAME: Pond #009
~ LOCATION: SEy SWy, Sec. 11. TSN. RSSW
MINE NAME: Seneca II-W Mine (Seneca Coa1
Co1 LOCATION: 8 mi. S of Hayden. CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Scott Williams , Gen Mar
Circle or write in aoorooriate reanonae
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: Ye No N/A
4. Burning (specify extent and location): Yes No ~
~J
5. Angle of slope: 3:1 upstream, 3:1 downstream Total = 6:1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes No A
At isolated points on embankment slopes: Yes o A
At natural hillside: Yes N/A
Over widespread areas: Yes N/A
From downstream foundation area: Yes 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 ~
o N/A
12. *Erosion of toe: Yes N/A
13. *Water impounded against toe: Yes o N/A
19. Existing embankment freeboard: Aonroximately 10 fe et
I5. X Increase Decrease in water level: 1 0 fe et
16. Cracks, bulging, or erosion on upstream face: Yes ®o N/A
17. Visible sumps or sinkholes in slurry surface: Yes No
18. *Clogging
Spillway channels and pipes: Yes
Decant system: Yes No
Diversion ditches: Yes No /A
19. *Cracking or crushing of pipes
Spillway pipes: Yes ~ N1~,
Decant system: Yes No A
20. Trash racks clear and in place: ~ No N/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.