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 FORN
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: M' _ha ~ Al av>>>a DATE: 515,/29 ~, e
NPDES I.D. NO.: CO-0000221 D.P. 0 10
FACILITY CONFIGURATION: Crone-Valle y Pond DATE LAST INSPECTION: D~/ 3/98
SITE NAME: Pond 6`010 LOCATION: NW3+ NR'x. cec_ 8 TSN R87W
MINE NAME: Yoaet M:nQ(ceneca Coal C o) LOCATION: 8_G m~- eF. of Hayes, CO
MINE I.D. NO.: CMT.Rn Permit No_ C-9 4-082 OWNER'S REP.: Brad Brown, Gen Mgr
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18
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, 3.75:1 downstream
*Seepage {specify location, color, and approximate volume)
From underdrain pipes:
At isolated points on embankment elopes:
At natural hillside:
over widespread areas:
From downstream foundation area:
"Boils" beneath stream or ponded water:
Cracks or ecarpe on treat:
Cracks or ecarpe on elope:
Sloughing or bulging on elope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
*Eroeion of toe:
*Water impounded against toe:
Existing embankment freeboard: Annroximately
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:
19. *Cracking or crushing of pipes
20.
Spillway pipes:
Decant system:
Trash racks clear and in place:
Yee
Yes o
Yes o
Yes o
Yes o
Yee No
Yes ©o
Yes
Yee
Yee ©o
Yee
Yee No
Yea
1510 feet
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
feet
Yee ~ N/A
Yes No N A
Yee Qo
Yes No N/
Yee 0° N/A
Yee
Yes No A
Yea 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 apace on the back of this sheet.
ee No N/A
~ in. N/A
ee No N/A
Yee No ®A
Total = 7.5:1 N/A