2012-11-05_HYDROLOGY - C2009087 ‎(4)‎

• Permit No: C2009087
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/5/2012
• Doc Name: 3rd Quarter 2012 Sedimentation Pond Inspection
• From: Peabody Sage Creek Mining, LLC
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: JDM
• Email Name: DIH
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: L - ( 0 1
NPDES I.D. NO.: N/A S .. ^ I�
FACILITY CONFIGURATION: Final Pit Impoundment DATE LAST INSPECTION:
SITE NAME: PeCoCo Reservoir LOCATION: SW',( NW' %, Sec. 2, T5N, R87W
MINE NAME: Peabody Sage Creek Mine LOCATION: 7.1 mi. SE of Hayden, CO
MINE I.D. NO.: CDRMS Permit No. C- 2009 -087 OWNER'S REP.: Mike Ludlow
Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes
2. Lift thickness:
3. Compaction according to approved plan: Yes
4. Burning (specify extent and location): No
5. Angle of slope (degrees)
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: N/A
At isolated points on embankment slopes: Yes
At natural hillside: Yes
Over widespread areas: Yes
From downstream foundation area: Yes
"Boils" beneath stream or ponded water: Yes
7. Cracks or scarps on crest: Yes
8. Cracks or scarps on slope: Yes
9. Sloughing or bulging on slope: Yes
10. *Major erosion problems: Yes
11. Surface movements in valley bottom or on hillside: Yes
12. *Erosion of toe: Yes
13. *Water impounded against toe: Yes No
14. Existing embankment freeboard: (normal = 6.1') G.( feet
15. Increase Decrease in water level: 1A.C7 CLC (44'
feet
16. Cracks, bulging, or erosion on upstream face: Yes N
17. Visible sumps or sinkholes in slurry surface: N/A
18. *Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
19. *Cracking or crushing of pipes
Spillway pipes: Yes
N/A
inches
degrees
Yes es
N/A
N/A
No
No
No
No
No
No
No
No
No
No
No
Decant system:
20. Trash racks clear and in place: N4A
21. Discharge rate (gpm) OcAmty- /42V'e. -t a 10 c''eeA c3Z-w CI e 'VQg.( o w
*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.