2008-08-04_HYDROLOGY - C1982057 ‎(2)‎

• Permit No: C1982057
• IBM Index Class Name: HYDROLOGY
• Doc Date: 8/4/2008
• Doc Name: 2nd Quarter 2008 Sedimentation Pond Inspection Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Email Name: DTM
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
water, Sediment, or Slurry impoundments

INSPECTOR'S NAME: Dennis Jones DATE: v ~'? ~ v
P
: CO-0000221 D
NO
D
NPDES I 016 3
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FACILITY CONFIGURATION: Cross-Val ley Pond DATE LAST INSPECTION:
SITE NAME: Pond #016 LOCATION: NE1/4 SE1/4 Sec. 27, T5N, R88W
MINE NAME: Seneca II-W Mine (Seneca Coal Co ) LOCATION: 8 mi. S of Ha yden, CO
MINE I.D. NO.: CMLRD Permit No. C -82-057 OWNER'S REP.: Gregg Kitchen Gen Mar

Circle or write in appropriate response
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Foundation preparation (removal of vegetation, stumps, topsoil: - Yes
Lift thickness: in.
tion according to approved plan:
C Yes
ompac
Burning (specify extent and location): No
Angle of slope: 3:1 upstream, 3:1 downstream Total = 6:1
*Seepage (specify location, color, and approximate volume)
From underdrain pipes: NL
Yes No
At isolated points on embankment slopes:
At natural hillside: -S o -V? Sti Yes
Yes
Over widespread areas:
From downstream foundation area: I
152
°
"Boils" beneath stream or ponded water: Yes
Cracks or scarps on crest: Yes No
Cracks or scarps on slope: Yes

Sloughing or bulging on slope:
Yes DO
*Major erosion problems: Yes

Surface movements in valley bottom or on hillside: Yes NNo

*Erosion of toe:
Yes .
?LV0
*Water impounded against toe: Yes No
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Existing embankment freeboard: (normal = 6.8') feet
Increase Decrease in water level: In o C- L%-C, L, feet
Cracks, bulging, or erosion on upstream face: Yes
Visible sumps or sinkholes in slurry surface: N/A
*Clogging
Spillway channels
Decant system: _
Diversion ditches:
*Cracking or crushing of
Spillway pipes: _
Decant system:
Trash racks clear and in place:
Discharge rate (gpm)
and pipes:
pipes
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 RCN N/A
N/A
N/A
Yes N® N/A
N/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.