HYDRO23523

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 2/4/2003
• Doc Name: 4th Quarter 2002 Sediment Pond Inspection
• From: Seneca Coal Company
• To: DMG
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
LVater, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis .Tones DATE: f L~ _~
NPDES I.D. NO.: CO-0000221 D.P. 011
_' ~ ~~
FACIL ITY C ONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION:
SITE NAME: Pond #011 LOCATION: NE'/a SWy,Sec. 16, TSN R87W
MINE NAME: Yoast Mine(Seneca Coal Co) LOCATION: 8.5 mi. SE of Hayden CO
MINE I.D. NO.: CMLRD Permit No. C- 94-082 OWNER'S REP.: Greaa Kitchen, Gen Mar
Circle or write in aooroDriate response
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Foundation preparation (removal of vegetation, stumps, topsoil: Yes
Lift thickness: 8
Compaction according to approved plan: Yes
Burning (specify extent and location): No
Angle of slope: 3.0:1 upstream, 2.8:1 downstream Total =
*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:
*Maj or erosion problems:
Surface movements in valley bottom or on hillside:
*Erosion of toe:
*Water impounded against toe:
Exrst'ng embankment freeboard: (normal = 5.1')
Increase Decrease in water level:
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in slurry 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: D ~ ~ D Ow ; ~.. 60 ~tcQ
in.
5.8:1
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes N N/A
v
G• feet
O• ~ feet
Yes ~ N/A
Yes No N/A
~A
Yes No 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.