2012-08-30_HYDROLOGY - C2009087

• Permit No: C2009087
• IBM Index Class Name: HYDROLOGY
• Doc Date: 8/30/2012
• Doc Name: 2nd Quarter 2012 Sedimentation Pond
• 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

INSPECTOR'S NAME: Dennis Jones
FACILITY CONFIGURATION: Incised Sump
SITE NAME: Portal Sump 1 (upper north)
MINE NAME: Peabody Sage Creek Mine
MINE I.D. NO.: CDRMS Permit No. C- 2009 -087
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PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
DATE: -
DATE LAST INSPECTION: l" G L I�
LOCATION: NW' %, Sec. 3, T5N, R87W
LOCATION: 7.1 mi. SE of Hayden, CO
OWNER'S REP.: Mike Ludlow
Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil:
2. Lift thickness:
3. Compaction according to approved plan:
4. Burning (specify extent and location):
5. Angle of slope: NA upstream, NA downstream
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes:
At isolated points on embankment slopes:
At natural hillside:
Over widespread areas:
From downstream foundation area:
"Boils" beneath stream or ponded water:
Yes
12 in.
Yes
No
Total = NA
N/A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
Cracks or scarps on crest:
Cracks or scarps on slope:
Sloughing or bulging on slope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
*Erosion of toe:
*Water impounded against toe:
Existing embankment freeboard: L,cg4ev jeoc.t 2 .Ve42,4. be - Toro Cc.Llueu' feet
No
No
Yes No ,N/A
Yes N/A
Yes No N/A
Yes No N A
Yes No N/A
Increase Decrease in water level: feet
Cracks, bulging, or erosion on upstream face: Yes
Visible sumps or sinkholes in slurry surface: N/A 4-11-D dia) kC
*Clogging
Spillway channels and pipes: Yes No N/A
Decant system: N/A
Diversion ditches: Yes No
19. *Cracking or crushing of pipes
Spillway pipes: Yes
Decant system: N/A
20. Trash racks clear and in place: Yes No
21. Discharge rate (gpm)
N/A
N/A
N/A
N/A
N/A
N A
N/A
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.