HYDRO29885

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 12/6/1999
• Doc Name: QUARTERLY SEDIMENTATION POND INSPECTIONS SENECA II-W MINE
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Michael Altavilla DATE: OQ~2'{/99
NPDES I.D. NO.: CO-0000221 ^.P. 009
FACILITY CONFIGURATION: Crone-Valley Pnnd DATE LAST INSPECTION: _06/29/99
SITE NAME: Pond 4009 LOCATION: cFl, sWS, _cec_ 11 TSN RRRW
MINE NAME: ceneca 77-W Mine ;Seneca Coal Col LOCATION: 8 mi. S of Hayden CO
MINE I.D. NO.: eM?.Rn permit No_ C-82-057 OWNER'S REP.: Brad Brown, Gen Mgr
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10.
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19
20.
Foundation preparation (removal of vegetation, etumpa, topsoil: ee No
Lift thickness: 1Z in
Compaction according to approved plan: es No
Burning (specify extent and location): Yes No
Angle of elope: 3:1 upstream, 3:1 downstream Total = 6:1
*seepage (specify location, color, and approximate volume)
From underdrain pipes:
At isolated points on embankment elopes:
At natural hillside:
Over widespread areas:
From downstream foundation area:
"Boils" beneath stream or ponded water:
Cracks or ecarpe on treat:
cracks or ecarpe on elope:
Sloughing or bulging on elope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
*Eroeion of toe:
*Water impounded against toe:
Existing embankment freeboard: An~rox;matel~
Increase ~ Decrease in water level:
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in Blurry surface:
*Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Cracking or crushing of pipes
spillway pipes:
Decant system:
Trash racks clear and in place:
Yes No
Yee o
Yes o
Yee o
Yes o
Yee No
Yes
Yee
Yee
Yes
Yee
Yes
Yee
9.4 feet
2.4 feet
Yes
Yes No
N/A
N/A
N/A
N/A
N/A
/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 ~ N[A
Yes t
,,L
r
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~
C
No
`
Yes Q
_
TJ
a
,
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ln
No
Yee ®o Nfa
Ye No `~!,1
es 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.