2007-11-30_HYDROLOGY - C1980005

• Permit No: C1980005
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/30/2007
• Doc Name: 4th Quarter 2007 Sedimentation Pond Inspection Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S N:~ME: Dennis Jones
NPDES I.D. NO.: CO-0000221 D.P.
FACILITY CONFIGURATION: Incised Pi
SITE NAME: Wade Impoundment #002
MINE NAME: Seneca II Mine (Seneca
MINE I.D. NO.: CMLRD Permit No. C
DATE: Iv^~iv
002 ~' s-
~nd DATE LAST INSPECTION:
LOCATION: NW1/ NE1/ Sec 34 T6N, R87W
Coal Co) LOCATION: 7 1 mi SE of Hayden, CO
-80-005 OWNER'S REP.: Gregg Kitchen Gen Mqr
Circle or write in appropriate response
Foundation preparation (removal of vegetation, stumps, topsoil:
1.
2. Lift thickness:
3. Compaction according to approved plan: ~
4. Burning (specify extent and location):
downstream
Total =
~A
5 u stream,
Angle of slope: p
.
6. *Seepage~ (specify location, color, and approximate volume) ~-
F'rom underdrain pipes:
At isolated points on embankment slopes: N A
At natural hillside: N A
Over widespread areas:
E~rom downstream foundation area:
y
No N/A
"Boils" beneath stream or ponded water: es
~A
7. Cracks or scarps on crest:
g. Cracks or scarps on slope: N A
g. Slough:ing or bulging on slope: Yes No N/A
10. *Major erosion problems:
hillside: Yes No N/A
11. Surface movements in valley bottom or on ~-
12. *Erosio~7 of toe:
13. *Water :impounded against toe: N A feet
14. Existing embankment freeboard:
~^~~
~
~
feet
15. ^
i
Increase Decrease in water level : lA.v e N A
16. Cracks, bulging, or erosion on upstream face: ~

17.
Visible sumps or sinkholes in slurry surface: -
18. *Clogging Yes ~ N/A
Spillway channels and pipes: N A
Decant system: Yes No N/A
Diversion ditches:
1g. *Cracking or crushing of pipes
Spillway pipes:
Decant system:
N A
20. Trash racks clear and in place: ~ g a
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 .