HYDRO23681

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 10/16/1997
• Doc Name: 3rd Qtr 1997 Sediment Pond Inspections
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

RFCEI\/FD
PERIODIC INSPECTION FORM OCT 1 g 1997
Water, Sediment, or Slurry Impoundments
iivisicn or nunerais G l-:eClDny
INSPECTOR'S NAME: M; ha ~ Al evil a DATE: 09/26/97
NPDES I.D. NO.: CO-0000221 ^_P. 0 10
FACILITY CONFIGURATION: Cross-Valle y Pond DATE LAST INSPECTION: 06>27/97
SITE NAME: Pond #010 LOCATION: NW'+ NEi, Sec. 8 TSN R87W
MINE NAME: Yoaet Mine(Seneca Coal C o) LOCATION: 8.5 mi. sE of Hayden, c0
MINE I.D. NO.: CMt_Rn Permit No. C-9 4-082 OWNER'S REP.: Brad Brown, Gen Mgr
1. Foundation preparation (removal of vegetation, stumps, topsoil: es No N/A
2. Lift thickness: ~_ in. N/A
3. Compaction according to approved plan: Yes No N/A
4. Burning (specify extent and location): Yes No ®A
5. Angle of elope: 3.75:1 upstream, 3.75:1 downstream Total = 7 _.5;1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes o N/A
At isolated points on embankment slopes: Yea o N/A
At natural hillside: Yes o N/A
Over widespread areas: Yes No N/A
From downstream foundation area: Yee N/A
"Boils" beneath et ream or ponded water: Yee ~
No N/A
7. Cracks or scarps on crest: Yes No N/A
8. Cracks or scarps on elope: Yes No N/A
9. Sloughing or bulging on elope: Yes N N/A
10. *Major erosion problems: Yes N/A
11. Surface movements in valley bottom or on hillside: Yea ~
o N/A
12. *Erosion of toe: Yes No N/A
13. *Water impounded against toe: Yee ~lo~ N/A
14. Existing embankment freeboard: Approximately 10.0 feet
15. Increase Decrease in water level: No changp_ feet
16. Cracks, bulging, or erosion on upstream face: Yee No N/A
17. Visible sumps or sinkholes in slurry surface: Yee No N/A
18. *Clogging
Spillway channels and pipes: Yee ® N A
Decant eyetem: Yes No N A
Diversion ditches: Yes ~ N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yee ~ N/A
Decant eyetem: Yee No
20. Trash racks clear and in place: 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 space on the back of this sheet.