2012-01-13_HYDROLOGY - C2009087 ‎(2)‎

• Permit No: C2009087
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/13/2012
• Doc Name: 4th Quarter 2011 Sedimentation Pond Inspection Report
• From: Peabody Sage Creek Mining, LLC
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: JDM
• Media Type: D
• Archive: No

INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: CO- 0048275 D.P. 004
FACILITY CONFIGURATION: Cross - Valley Pond
SITE NAME: South Section 12 Pond #004
MINE NAME: Peabody Sage Creek Mine
MINE I.D. NO.: CDRMS Permit No. C- 2009 -087
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: 5:1 upstream, 2:1 downstream Total = 7:1
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: N/A
At isolated points on embankment slopes: Yes �o N/A
At natural hillside: Yes No N/A
Over widespread areas: Yes No N/A
From downstream foundation area: 6 e,e l4.2 ( 02i3D No N/A
N/A
"Boils" beneath stream or ponded water: Yes (No 1 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 No N/A
11. Surface movements in valley bottom or on hillside: Yes 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 = 4.8') 9.0 feet
15. Increase Decrease in water level: kti G L-06 4.p .e. feet
16. Cracks, bulging, or erosion on upstream face: Yes N/A
17. Visible sumps or sinkholes in slurry surface: N/A
18. *Clogging
Spillway channels and pipes: Yes al> N/A
Decant system: Inoperable Yec No N/A
Diversion ditches: Yes N/A
19. *Cracking or crushing of pipes
Spillway pipes:
Decant system: Inoperable
20. Trash racks clear and in place:
21. Discharge rate (gpm)
PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
DATE: 1` 1\
DATE LAST INSPECTION: ( - U '' (
LOCATION: SW'% SEl /,, Sec. 12, T5N, R87W
LOCATION: 7.1 mi. SE of Hayden, CO
OWNER'S REP.: Mike Ludlow
Circle or write in appropriate response
*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. f f n
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. R w � � G . �� o c) c�.��;�.�� -Sp y Cte � I �� U
Yes CRP N/A
Ycc N N/A
Yes No N/A
6