2010-01-11_HYDROLOGY - C1994082 ‎(3)‎

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 1/11/2010
• Doc Name: 4th Quarter 2009 Sedimentation Pond Inspection Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Email Name: DTM
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones
NPDES I.D. NO.: N/A
FACILITY CONFIGURATION: Cross-Valley Pond
SITE NAME: Pond #011A
MINE NAME: Yoast Mine(Seneca Coal Cc)
MINE I.D. NO.: CMLRD Permit No. C-94-082
DATE : V A414, 09
DATE LAST INSPECTION: q -,? Oct
LOCATION: SW1/, NW/4, Sec. 16 , TSN, R87W
LOCATION: 8.5 mi. SE of Hayden, CO
OWNER'S REP.: Roy Karo, Gen Mgr
Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes
2. Lift thickness: 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: N/A
At isolated points on embankment slopes: Yes o 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
il. 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:
1 Yes N
feet N/A
14. )
Existing embankment reeboard: (normal = 4.5
15. Increase Decrease in water level: ©_ 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: N/A
Diversion ditches: N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes No
Decant system: N/A
20. Trash racks clear and in lace: es No
21. Discharge rate (gpm) 0-
*Maj or adverse changes in these items could cause instability and should 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 , volume,
etc. ) in the space on the back of this sheet.