HYDRO29664

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 4/23/1998
• Doc Name: 1st 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 FORM
Water, Sedimeat, or Slurry Impoundments
INSPECTOR'S NAME: Michael Alt avil7a DATE: 03/23/98
NPDES I.D. NO.: c0-0000221 D.P. 0 10
FACILITY CONFIGURATION: Croea-Valle y Pond DATE LAST INSPECTION: 12/1797
SITE NAME: Pond CO10 LOCATION: NWk NEi( Sec_ 8 T5N R87W
MINE NAME: ~'oaa Min (c n a oal o) LOCATION: 8.5 mi. aE of Hayes. CO
MINE I.D. NO.: eMi.Rn permit No_ C-9 4-OB2 OWNER'S REP.: Brad Rrown, Gen Mqr
1
2
3
4
5
6
Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of elope: 3.75:1 upstream, 3.75:t 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:
7. Cracks or scarps on crest:
8. Cracks or scarps on slope:
9. Sloughing or bulging on elope:
10. *Major erosion problems:
11. Surface movements in valley bottom or on hillside:
12. *Eroeion of toe:
13.
14.
15.
16.
17.
18.
19.
20
*Water impounded against toe:
Existing embankment freeboard: Annroxi~ately
Increase Decrease in water level: No change
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:
feet
Yea ~ N/A
Yea No
Yea ~ N A
Yes No /
Yee No N/A
Yes No N A
Yee No
Yes No N
*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 o£ this sheet.
Yes No
~_ in
Ye No
Yea No
Total = 7_..5_:1
Yes o
Yea o
Yes o
Yes o
Yes o
Yee o
Yes o
Yee
Yee
Yee o
Yee
Yee
Yee
lo.D feet
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