HYDRO26997

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 9/23/1996
• Doc Name: 3rd Qtr 1996 Sediment Pond Inspections
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PBRIODIC INSP&CTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Michael Altavilla DATE: 09/18/96
NPDES I.D. NO.: CO-0000221 D.P. 006
FACILITY CONFIGURATION: Cross-Vallev Pond DATE LAST INSPECTION: 06/05/96
SITE NAME: Pond #006 LOCATION: NWS: NWT:, Sec. 22, TSN. R88W
MINE NAME: Seneca II-W Mine (Seneca Coal Co) LOCATION: 8 mi. S of Hayden. CO
MINE I.D. NU.: CMLRD Permit No. C-82~057 OWNER'S AEP.: Hrad Hrown, Gen Mor
Circle or write in annronriate reanonse
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Foundation preparation (removal of vegetation, stumps, topsoil: Yes No
Lift thickness: 12 in
Compaction according to approved plan: ~ No
Burning (specify extent and location): Yes No
Angle of slope: 3:1 upstream, 3:1 downstream Total = 6:1
*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: A~oroximately
Increase X Decrease in water level:
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in slurry surface:
*Clogginq
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Crackinq or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place:
Yes No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes ,®
Yes
es No
Yes
Yes o
12.8 feet
1.9 feet
Yes
Yes No
N/A
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/A
Yes ~°
Yes No
Yes No /
Yes ~ N/A
Yes No /A
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.