HYDRO22160

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 1/26/1998
• Doc Name: 4th Qtr 1997 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, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Michael Alt avilla DATE: ~~17/97
NPDES I.D. NO.: CO-0000221 D.P. 0 11
FACILITY CONFIGURATION: Cross-Valle y Pond DATE LAST INSPECTION: N/A
SITE NAME: Pond #011 LOCATION: NEid SW'q, Sec. 16, T6N, R87W
MINE NAME: Yoaet Mine~Seneca Coal C o) LOCATION: 8.5 mi. SE of Haydn, CO
MINE I.D. NO.: C r.Rn m, No. -4 4-08 OWNER'S REP.: Brad Brown, Gen Mar
1
2
Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
3. Compaction according to approved plan:
4. Burning (specify extent and location):
5. Angle of slope: 3.0:1 upstream,
No
~_ in
No
Yea No
2.8:1 downstream Total = 5.8:1
6. *Seepage (specify location, color, and approximate volume)
7.
8.
9.
10
11
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 elope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
12. *Erosion of toe:
13. *Water impounded against toe:
14. Existing embankment freeboard: Approximately
15. ~ Increase Decrease in water level:
16. Cracks, bulging, or erosion on upstream face:
17. Visible sumps or sinkholes in slurry surface:
18. *Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
19. *Cracking or crushing of pipes
spillway pipes:
Decant system:
20. Trash racks clear and in place:
Yea o
Yee No
Yes
Yea o
Yee N
Yes N~~~o
Yee
Yee o
Yes
Yee
Yea o
Yes o
Yes
16.6 feet
4.0 feet
Yes No
Yee No
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
N~A
N A
N~A
Yes ~ N A
Yes No A
Yee No N
Yes 0 N A
Yee No
Yee No 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.