HYDRO25778

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 9/4/2001
• Doc Name: 2nd Qtr 2001 Sediment Pond Inspections
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Hater, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: 06/28/01
NPDES I.D. NO.: CO-0000221 D.P. 011
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: 03/27/01
SITE NAME : Pond #011 LOCATION: NEya SW'/a, Sec 16, TSN R87_W
MINE NAME : Yoast Mine(Seneca Coal Col LOCATION: 6.5 mi. SE of Hayden. CO
MINE I.D. NO.: CMLRD Permit No. C-99-082 OWNER'S REP.: Greaa Kitchen Gen Mar
Circl® or write in aoorouriate reaoonae
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes No N/A
2. Lift thickness: 8 in. N/A
3. Compaction according to approved plan: Yes No N/A
4. Burning (specify extent and location): Yes No N/A
5. Angle of slope: 3.0:1 upstream, 2.8:1 downstream Total = 5.8:1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes No N/A
At isolated points on embankment slopes: Yes No N/A
At natural hillside: Yes No N/A
Over widespread areas: Yes No N/A
From downstream foundation area: Yes No N/A
"Boils" beneath stream or ponded water: Yes No N/A
7. Cracks or scarps on crest: Yes No N/A
8. Cracks or scarps on slope: Yes No N/A
9. Sloughing or bulging on slope: Yes No N/A
10. *Major erosion problems: Yes No N/A
11. Surface movements in valley bottom or on hillside: Yes No N/A
12. *Erosion of toe: Yes No N/A
13. *Water impounded against toe: Yes No N/A
14. Existing embankment freeboard: (normal = 5.1'1 5. 1 feet
15. x Increase Decrease in water level: 0.7 5 feet
16. Cracks, bulging, or erosion on upstream face: Yes ~° N/A
17. Visible sumps or sinkholes in slurry surface: Yes No NL
18. *Clogging
Spillway channels and pipes: Yes No N/A
Decant system: Yes NL
Diversion ditches: Yes No
19. *Cracking or crushing of pipes
Spillway pipes: _ Yes No N/A
Decant system: Yes No NL
20. Trash racks clear and in place: Yes No
*Major adverse changes in these items could cause instability and should be reporr_ed 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.