2008-05-30_HYDROLOGY - C1980005 ‎(2)‎

• Permit No: C1980005
• IBM Index Class Name: HYDROLOGY
• Doc Date: 5/30/2008
• Doc Name: 1st Quarter 2008 Sedimentation Pond
• 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 DATE: 3-7-0?
NPDES I D NO • CO-0000221
FACILITY CONFIGURATION: Cross-Val
SITE NAME: Pond #008
MINE NAME: Seneca II Mine (Seneca
MINE I.D. NO.: CMLRD Permit No C
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
and pipes:
pipes
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Yes ®o N/A
N/A N/A
Yes No N/A
N/A
Yes No N/A
*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.
I/ a (A- L. C-Q
3 ??-QA o ? :s k &` V O
VV0
ley Pond DATE LAST INSPECTION: 67
LOCATION: SWl/, NWV/. Sec 7 T5N R86W
Coal Co) LOCATION: 7.1 mi. SE of Hayden CO
-80-005 OWNER'S REP.: Gregg Kitchen Gen Mgr
Circle or write in a ropriate response
Foundation preparation (removal of vegetation, stumps, topsoil: Yes
Lift thickness: 1

Compaction according to approved plan: 2

Burning (specify extent and location): Yes

Angle of slope: 3:1 upstream, 3:1 downstream No
Total =
6:1
*Seepage (specify location, color, and approximate volume)
From underdrain pipes: N/A
At isolated points on embankment slopes: Yes No
At natural hillside:

over widespread areas: Yes No

From downstream foundation area: Yes No

"Boils" beneath stream or ponded water: Yes
Yes No
Cracks or scarps on crest: Yes
Cracks or scarps on slope: Yes J
Sloughing or bulging on slope:

*Major erosion problems:
Yes No

Surface movements in valley bottom or on hillside:See- oil 5? Yes
es
No
*Erosion of toe:

*Water impounded against toe: Yes o
(N

Existing embankment freeboard: normal = 4.7
Ye
I o
feet
Increase Decrease in water level: feet
Cracks, bulging, or erosion on upstream face: Yes Q
Visible sumps or sinkholes in slurry surface:
* N/A
Clogging
Spillway channels
Decant system: _
Diversion ditches:
*Cracking or crushing of
Spillway pipes: _
Decant system: _
Trash racks clear and in place:
Discharge rate (gpm)