2012-05-21_HYDROLOGY - C2009087 ‎(3)‎

• Permit No: C2009087
• IBM Index Class Name: HYDROLOGY
• Doc Date: 5/21/2012
• Doc Name: 1st 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

INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: CO- 0048275 D.P. 003
FACILITY CONFIGURATION: Diked Pond
SITE NAME: Northwest Impoundment #003
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: `'9'-
DATE LAST INSPECTION: /0 l I
LOCATION: SE'% SW',, Sec. 27, T6N, R87W
LOCATION: 7.1 mi. SE of Hayden, CO
OWNER'S REP.: Mike Ludlow
Circle or write in appropriate response
Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 2:1 upstream, 3:1 downstream Total = 5:1
*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:
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: (normal = 4.9')
Increase Decrease in water level:
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in slurry surface:
*Clogging
Yes
12 in.
Yes
No
N/A
Yes o N/A
Yes No N/A
Yes No N/A
Yes N. N/A
Yes o N/A
Yes o N/A
Yes o N/A
Yes o N/A
Yes o N/A
Yes o N/A
Yes o N/A
Yes 1. N/A
41,9 feet
to 7 ci.`��,2 feet
Yes CD N/A
N/A
Spillway channels and pipes: Yes No N/A
Decant system: N/A
Diversion ditches: Yes 0 N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes T N/A
Decant system: N/A
20. Trash racks clear and in place: Yew No N/A
21. Discharge rate (gpm)
a3
*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.