HYDRO30805

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 10/5/2007
• Doc Name: 3rd Quarter 2007 Inspection Reports
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
~~ S _O
INSPECTOR 'S NAME: Dennis Jones DATE:
NPDES I.D . NO.: N/A / _ G _ O~]
FACILITY CONFIGURATION: I ncised Pond DATE LAST INSPECTION : (~ ` I
SITE NAME : Truck Wash SuAA ly Pond LOCATION: NW'/. NE'/< S ec 34 T6N R87W
MINE NAME : Seneca Mine II (Seneca Coal Co) LOCATION: 7.2 mi. SE of Ha Vden, CO
MINE I.D. NO.: CDMG Permit No. C- 80-005 OWNER'S REP.: Gregg Kitchen, Gen Mar
Circle oI write in aAArooriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes
2. Lift thickness: 12 inch es
3. Compaction according to approved plan: Yes
4. Burning (specify extent and location}: No
5. Angle of slope: 2:1 upstream, 2:1 downstream Total = 4 :1
6. *Seepage (specify Location, color, and approximate volume)
From underdrain pipes:
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. *Maj or 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 N N/A
14. Existing embankment freeboard: (normal = 2.7') oZ~ feet
15. Increase Decrease in water level: ti o G ~v-~.~Q feet
16. Cracks, bulging, or erosion on upstream face: Yes No N/A
17. Visible sumps or sinkholes in slurry surface: N A
18. *Clogging
Spillway channels and pipes: Yes No N/A
Decant system:
Diversion ditches: Yes No N/A
19. *Cracking or crushing of pipes

Spillway pipes: Yes No N/A
Decant system:
20. Trash racks clear and in place:
21. Discharge rate (gpm) ~Z_s
*Maj or adverse changes in these items could cause instability and should be reported to the
Engineering Manager and Mine Superintendent £or 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.