HYDRO28814

• Permit No: C1994082
• IBM Index Class Name: Hydrology
• Doc Date: 7/26/2004
• Doc Name: 2nd Quarter 2004 Sedimentation Pond Inspections
• From: Seneca Coal Company
• To: DMG
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Hater, Sediment, or Slurry Imyou/nd^m~enta ~/
INSPECTOR'S NAME: Dennis Jones DATE: 6 ~A 3 '~ 1
NPDES I.D. NO.: CO-0000221 D.P. 012 L..~
FACILITY CONFIGURATION: Cross-Vallev Pond DATE LAST INSPECTION: 3 ' ~~'~ 1
SITE NAME: Pond #012 LOCATION: NE'/a ,Sec. 19, TSN, R87W
MINE NAME; Yoast Mine(Seneca Coal Co) LOCATION: 8.5 mi. SE of Havden, CO
MINE I.D. NO.: CMLRD Permit No. C-94-082 OWNER'S REP.: Greoc Kitchen, Gen Mpr
Circle Or Write i.n BAATODr.7.ate reaDOnee
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes
2. Lift thickness: 12 in.
3. Compaction according to approved plan: Yes
4. Burning (specify extent and location): No
5. Angle of slope: 3.0:1 upstream, 3.0:1 downstream Total = 6.0 :1
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
9. Cracks or scarps on slope: Yes No N/A
9. Sloughing or bulging on slope: Yes No N/A
10. *Major erosion problems: Yes 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 = 8.0') ~ feet
15. Increase Decrease in water level: h o Gl.a w~Q feet
16. Cracks, bulging, or erosion on upstream face: Yes Q° N/A
17. Visible sumps or sinkholes in slurry surface:
19. *Clogging
Spillway channels and pipes: Yes No N/A
Decant system: Yes No N/A
Diversion ditches: 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
*Ma jor adverse changes in these items could cause instability and shou ld be reported to
the Engineering Manager and Mine Superintendent for further eval uation. Adverse
conditions noted in these items should normally be described (extent, location, volu me,
etc .) in the space on the back of this sheet.