2011-07-28_HYDROLOGY - C2009087

• Permit No: C2009087
• IBM Index Class Name: HYDROLOGY
• Doc Date: 7/28/2011
• Doc Name: 2nd Quarter 2011 Quarterly Sedimentation Pond Inspection
• From: Peabody Sage Creek Mining, LLC
• 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: 4;
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.
2.
3.
4.
5.
6.
DATE LAST INSPECTION:
Circle or write in appropriate response
LOCATION: SW'% SE %, Sec. 12, T5N, R87W
LOCATION: 7.1 mi. SE of Hayden, CO
OWNER'S REP.: Mike Ludlow
Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 5:1 upstream, 2:1 downstream
*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: SEe 3Qlo0
"Boils" beneath stream or ponded water:
7. Cracks or scarps on crest:
8. Cracks or scarps on slope:
9. Sloughing or bulging on slope:
10. *Major erosion problems:
11. Surface movements in valley bottom or on hillside:
12. *Erosion of toe:
13. *Water impounded against toe:
14. Existing embankment freeboard: (normal = 4.8')
15. Increase Decrease in water level:
16. Cracks, bulging, or erosion on upstream face:
17. Visible sumps or sinkholes in slurry surface:
18. *Clogging
Spillway channels and pipes:
Decant system: Inoperable
Diversion ditches:
19. *Cracking or crushing of pipes
Spillway pipes:
Decant system: Inoperable
20. Trash racks clear and in place:
21. Discharge rate (gpm)
G (tc55j � c-r- . 'L -c2CD1/4) 5 w
cJLf2 sp:llcoGt (_ ,
c;iaok
Yes
12
Yes
No
Total = 7:1
N/A
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Li. g feet
feet
Yes ® N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Yes 5 N/A
Yes No— N/n
Yes N/A
Yes N/A
Ycs No N/A
es No N/A
i-'
*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.
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