HYDRO24873

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 10/21/2002
• Doc Name: 3rd Quarter 2002 Sedimentation Pond Inspections
• From: Seneca Coal Company
• To: DMG
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
= Water, Sediment, or Slurry Igmpoundment^s~
INSPECTOR'S NAME: Dennis Jones DATE: (,' 2 3'~
NPDES Z.D . NO.: CO-0000221 D.P. 005 n
FACILITY CONFIGURATION: Cross-Valley Pond ^~
DATE LAST INSPECTION: _
lJ
SITE NAME : Pond #005 LOCATION: NWi/, SW'/„ Sec. 10, T5N, R88W
MINE NAME : Seneca II-W Mine (Seneca Coal Co) LOCATION: 8 mi. S of Hayden, CO
h7INE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Greg g Kitchen, Gen Mgr
Circle or write in appropriate response
t
3
4
5
~;
7
8
9
1.0
L1
12
i.3
I4
15
16
17
18
i9
20
Foundation preparation (removal of vegetation, stumps, topsoil
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 3.5:1 upstream, 2.5:1 downstream
*Seepage (specify location, color, and approximate volume)
From underdrain pipes:
At isolated points on embankment slopes:
At natural hillside:
Over widespread areas:
From downstream foundation area:
"Boils" beneath stream or ponded water:
Cracks or scarps on crest:
Cracks or scarps on slope:
Sloughing or bulging on slope:
*Maj or erosion problems:
Surface movements in valley bottom or on hillside:
*Erosion of toe:
*Water impounded against toe:
Existing embankment freeboard: (normal = 7.4')
Increase ~ Decrease in water level:
Cracks, bulging, or erosion on upstream face:
visible sumps or sinkholes in slurry surface:
*Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place:
Yes
12
in.
Yes
No
Total
6:1
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
Yes No N/A
~ 3 feet
3 ffe
et
Yes ~~~
~ N/A
N/A
Yes No N/A
Yes No N/A
Yes No N/A
es No N/A
Yes No N/A
N/A
~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
chose items should normally be described (extent, location, volume, etc.) in the space~on the
back of this sheet.