HYDRO26581

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 7/17/1998
• Doc Name: 2nd Qtr 1998 Sediment Pond Inspections
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORK
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Michael Altavilla DATE: 06~29~98
NPDES I.D. NO.: CO-0000221 D.P. 0 11
FACILITY CONFIGURATION: Crnae-Valle y Pond DATE LAST INSPECTION: 03/23/98
SITE NAME: Pond #011 LOCATION: NA:3, SW3t a~15 TSN R87W
MINE NAME: Yoa=mot Mi ~,(~ n a -oa7 - o) LOCATION: 8.5 mi. SE of Hayden CO
MINE I.D. NO.: c t. n pe m, No. C-4 4-08 OWNER'S REP.: Brad Brown ~ Gan Mgr
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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 elope: 3.0:1 upstream, 2.8:1 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 elope:
Sloughing or bulging on slope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
*Eroaion of toe:
*Water impounded against toe: _
Existing embankment freeboard:
~_ 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:
ee No
~_ in.
ea No
Yes No
Total = 5_..8_:1
Yea N
Yes No
Yee o
Yee o
Yee N
Yea o
Yee No
Yes No
Yee o
Yee No
Yee No
Yea
Yes
s.2 feet
1D.3 feet
Yes
Yes No
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
N/A
N/A
N/A
Yee ®° N/A
Yes No C~~A
Yea No ~7UY mil'
Yee 0° N A
Yes No
Yea No
*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 apace on the back of this sheet.