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 Impoun~d/ments
INSPECTOR' S NAME : Dennis Jones DATE : 1~ - ` ~~
NPDES I.D. NO..: CO-0000221 D.P. 008 ~.-' -- Q
FACILITY CONF=iGURATION: Cross-Valley Pond DATE LAST INSPECTION:
SITE NAME: Pond #008 LOCATION: SW1/, NW'/< Sec 7 T5N R86W
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 Kitchen Gen Mar
Circle or write in appropriate response
ndation preparation (removal of vegetation, stumps, topsoil:
F Y12
1, ou
2, Lift thickness: Yes
3 Compaction according to approved plan:
.
4.
Burning (specify extent and location):
1 downstream
3 No
-
Total =

6:1
5.
:
stream,
Angle of slope: 3:1 uP
e (specify location, color, and approximate volume)
a
*S
6. g
eep ~-
From underdrain pipes:
t isolated points on embankment slopes:
A Yes
y No
No N/A
N/A
.
A.t natural hillside: es
Yes No N/A
Gver 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
g. Cracks or scarps on slope: yes No N/A
g. Sloughing or bulging on slope: Yes No N/A
10. *Major erosion problems:
n hillside: ye No N/A
11. Surface' movements in valley bottom or o yes No N/A
12. *Erosioii of toe: yes No N/A
13. *Water 'impounded against toe:
' ~•- feet
14. Existing embankment freeboard: normal = 4.7
~ G ~.otQ
I/ feet
15.
~,c
Decrease in water level:
:Cncrease
Yes
No
N/A
16. Cracks, bulging, or erosion on upstream face: L
17. VisiblES sumps or sinkholes in slurry surface: _
18. *Clogging Yes Do N/A
;spillway channels and pipes:
Decant system: ~A
:Diversion ditches:
19. *Cracki:ng or crushing of pipes YeS No N/A
Spillway pipes: N A
Decant system:
Yes
No
N/A
20. Trash racks clear and in place: ~

21.
Discharge rate (gpm) - -
*Major adveYSe 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.