2012-01-13_HYDROLOGY - C1980005 ‎(2)‎

• Permit No: C1980005
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/13/2012
• Doc Name: 4th Quarter 2011 Inspection Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: JDM
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: /6 11
NPDES I.D. NO.: CO- 0000221 D.P. 008
FACILITY CONFIGURATION: Cross - Valley Pond DATE LAST INSPECTION:
SITE NAME: Pond #008
MINE NAME: Seneca II Mine (Seneca Coal Co)
MINE I.D. NO.: CMLRD Permit No. C -80 -005
18. *Clogging
Spillway channels and pipes:
Decant system:
Circle or write in appropriate response
LOCATION: SW NWl %, Sec. 7, T5N, R86W
LOCATION: 7.1 mi. SE of Hayden, CO
OWNER'S REP.: Roy Karo, Gen Mgr
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes
2. Lift thickness: 12
3. Compaction according to approved plan: Yes
4. Burning (specify extent and location): No
5. Angle of slope: 3:1 upstream, 3:1 downstream Total = 6:1
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: N/A
At isolated points on embankment slopes: Yes No N/A
At natural hillside: Yes No N/A
Over widespread areas: Yes No N/A
From downstream foundation area: Yes No N/A
"Boils" beneath stream or ponded water: Yes No N/A
7. Cracks or scarps on crest: Yes No N/A
8. Cracks or scarps on slope: Yes No N/A
9. Sloughing or bulging on slope: Yes No N/A
10. *Major erosion problems: Yes kNo1 N/A
11. Surface movements in valley bottom or on hillside: See 60..n. S„JkL 'e, No N/A
12. *Erosion of toe: Yes No N/A
13. *Water impounded against toe: Yes No N/A
14. Existing embankment freeboard: (normal = 4.7') All feet
15. Increase Decrease in water level: 0 feet
16. Cracks, bulging, or erosion on upstream face: Yes N o N/A
17. Visible sumps or sinkholes in slurry surface: N/A
Yes 111' N/A
N/A
N/A
Diversion ditches:
19. *Cracking or crushing of pipes
Spillway pipes: Yes T) N/A
Decant system: N/A
20. Trash racks clear and in place: No N/A
21. Discharge rate (gpm) 21
*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.