2010-07-28_HYDROLOGY - C1980005

• Permit No: C1980005
• IBM Index Class Name: HYDROLOGY
• Doc Date: 7/28/2010
• Doc Name: 2nd Quarter 2010 Sedimentation Pond Inspection
• 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.: CO-0000221 D.P. 002
FACILITY CONFIGURATION: Incised Pond
SITE NAME: Wadge Impoundment #002
MINE NAME: Seneca II Mine (Seneca Coal Cc)
MINE I.D. NO.: CMLRD Permit No. C-80-005
DATE : ej - 15 _ 10-
DATE LAST INSPECTION: 3 - l- 10
LOCATION: NW/4 NE/4, Sec. 34, TGN, R87W
LOCATION: 7.1 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: _ N/A
. N/A
2. Lift thickness: N/A
3 Compaction according to approved plan:
.
4 Burning (specify extent and location): N/A
.
5. Angle of slope: upstream, downstream Total = N/A
6 *Seepage (specify location, color, and approximate volume)
. N/A
From underdrain pipes: N/A
At isolated points on embankment slopes:
At natural hillside: N/A
Over widespread areas: N/A
From downstream foundation area: N/A
Y
No N/A
"Boils" beneath stream or ponded water: es
N/A
7. Cracks or scarps on crest: N/A
8. Cracks or scarps on slope: N/A
9. Sloughing or bulging on slope: Y o N/A
10. *Major erosion problems: es
Y No N/A
11 Surface movements in valley bottom or on hillside: es
. N/A
12. *Erosion of toe: N/A
13. *Water impounded against toe: N/A feet
14. Existing embankment freeboard:
15. Increase Decrease in water level: c? G 4 k?fL feet
16. Cracks, bulging, or erosion on upstream face: N/A
17. Visible sumps or sinkholes in slurry surface: N/A
18. *Clogging
Yes
N/A
Spillway channels and pipes:
N/A
Decant system: Yes No N/A
Diversion ditches:
19. *Cracking or crushing of pipes
N/A
Spillway pipes: N/A
Decant system: N/A
20. Trash racks clear and in place: `a g le
21. Discharge rate (gpm)
*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.