HYDRO29429

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 7/2/2003
• Doc Name: 2nd Quarter 2003 Sedimentation Pond Inspections
• From: Seneca Coal Company
• To: DMG
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sedimeat, or Slurry Impoundments

INSPECTOR
'S NAME: Dennis Jones q
DATE: ~` ~ ` 0 t
NPDES I.D . NO.: CO-0000221 D.P. 004
~~~~`~
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION:
SITE NAME : South Section 12 Pond #004 LOCATION: SW~/, SE'/„ Sec. 12, TSN, R87W
MINE NAME : Seneca II Mine (Seneca Coal Co) LOCATION: 7.1 mi. SE of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-80-005 OWNER'S REP.: Gregg Kit chen, Gen Mgr
Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes
2. Lift thickness: 12
3, Compaction according to approved plan: Yes
4. Burning (specify extent and location): No
5, Angle of slope: 5:1 upstream, 2:1 downstream Total 7:1
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: 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 scalps 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. *EYOS7.On Of toe: Yes No N/A
13. *Water impounded against toe: Yes No N/A
14. Existing embankment freeboard: (normal = 4. 9') L) p
l feet
15. 1
Increase Decrease in water level: kc1 C.KO 4y 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: Yes No N/A
Diversion ditches: Yes No N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes No N/A
Decant system: Yes No N/A
20. Trash racks clear and in place: Yes 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 space on the
back of this sheet.