2009-10-29_HYDROLOGY - C1982057 ‎(2)‎

• Permit No: C1982057
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/29/2009
• Doc Name: 3rd Quarter 2009 Sedimentation Pond Inspection
• From: Seneca Coal Company
• To: DRMS
• Email Name: DTM
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundme2ntp C/
INSPECTOR'S NAME: Dennis Jones DATE: <9- 'Q
NPDES I.D. NO.: CO-0000221 D.P. 009
FACILITY CONFIGURATION:
SITE NAME: Pond #009
MINE NAME: Seneca II-W Mine (Seneca Coal Cc)
MINE I.D. NO.: CMLRD Permit No. C-82-057
DATE LAST INSPECTION: 6-17-0-T
LOCATION: SE1/ SWV44, Sec. 11, T5N, R88W
LOCATION: 8 mi. S of Hayden, CO
OWNER'S REP.: Roy Karo, Gen Mgr
Circle or write in appropriate response
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Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 3:1 upstream, 3:1 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:
"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 = 6.91)
Increase __ Decrease in water level: ? ^
N/A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Cracks, bulging, or erosion on upstream face: Yes
Visible sumps or sinkholes in slurry surface: N/A
*Clogging
Spillway channels and pipes: Yes
Decant system: N/A
Diversion ditches: N/A
*Cracking or crushing of pipes
Spillway pipes: Yes
Decant system: N/A
Trash racks clear and in place: Ye
Discharge rate (gpm) Jt,) A BSc,
6:1
NO
No
No
NO
No
No
No
No
NO
NO
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
feet
feet
N/A
0 N/A
N/A
NO 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.
Cross-Valley Pond
Yes
12 in.
Yes
_ No
Total =