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
TOR' S NF ME • Dennis Jones DATE : ~ ~ -~ `~ -~~
INSPEC
D
NPDES I ~
NO.: N A
~ - `~ -~~
.
.
FACILITY C ONF]:GURATION: Incised Pond DATE LAST INSPECTION:
34 T6N R87W
Sec
NE1/
W1
SITE NAME: S ill Control Pond No. 2 .
/a
a
LOCATION: N
CO
7 1 mi SE of Hayden
MINE NAME: Seneca Mine II (Seneca Coal Co) ,
LOCATION:
Greaa Kitchen Gen Mqr
'S REP
MINE I.D. NO.: CDMG Permit No. C- 80-005 .:
OWNER
Circle or write in appropriate response
1 Foundation preparation (removal of vegetation, stumps, topsoil: Yes
. ~A
2. Lift thickness: NSA
3. Compaction according to approved plan:
N~
4. Burning (specify extent and location):
Total
= ~A
5. Angle of slope: upstream, downstream
6 *Seepage (specify location, color, and approximate volume)
.
From underdrain pipes:
At isolated points on embankment slopes:
Yes
Not
N
!
N/A
N/A
At natural hillside: Yes
Yes o
No~ N/A
Over widespread areas: Yes No + N/A
From downstream foundation area: Yes No N/A
"Boils" beneath stream or ponded water: Y N N/A
7. Cracks or scarps on crest:
es
Yes
o
No
N/A
8. Cracks or scarps on slope:
Yes
No
N/A
g. Sloughing 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 Yes No N/A
12. *Erosion. of toe:
Yes
N/A
13. *Water impounded against toe:
' 7.0 feet
14. )
Existing embankment freeboard: (normal - 7 0
'
~
feet
15. ~ d ~
Increase Decrease in water level: _ Yes 1~Vo N/A
16. Cracks, bulging, or erosion on upstream face:
N L
17. Visible sumps or sinkholes in slurry surface:
18. *Cloggir~g
Yes
No
N/A
Spillway channels and pipes: N A
L)ecant system: ~~`
Diversion ditches:
19. *Crackirig or crushing of pipes
Spillway pipes:
Decant system:
2p. Trash racks clear and in place:
21. Discharge rate (gpm) ~'
*Major adverse changes in these items could cause instability and should
ther evaluation. Adverse
f be reported to the
conditions noted in
ur
Engineering Manager and Mine Superintendent for
location, volume, etc.)
described (extent
b
l in th e space on the
thes ,
e
y
e items ;ahould normal
back of this sheet.