HYDRO29281

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 12/4/2006
• Doc Name: 4th Quarter 2006 Pond Inspection Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Dennis Jones DATE: _ ~O'L3-~~
NPDES I.D . NO.: CO-0000221 D.P. 017

FACILITY
CONFIGURATION: Cross-Valley Pond ~_
DATE LAST INSPECTION: ~_ 6~
SITE NAME : Pond #017 LOCATION: SW~/. NEB/.. Sec. 34. TSN R88W
MINE NAME : Seneca II-W Mine (Seneca Coal Co) LOCATION: 8 mi. S of Havden. CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Grea4 Kitchen, Gen Mgr
Circle or write in aonrooriate response
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Foundation preparation (removal of vegetation, stumps, topsoil
Lift thickness:
Yes
in.
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 3:1 upstream, 3:1 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:
Exist'ng embankment freeboard: (normal = 3.1')
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
No
Total = 6_1
1A
Yes ~ N/A
Yes No N/A
Yes N/A
es No N/A
Yes o 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 N N/A
3_(_ feet
~-~- feat
Yes No N/A
NL

Yes ~ N/A
Yes No N/A
N
es No N/A
*Maj or 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.