HYDRO20304

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 10/21/1994
• Doc Name: QUARTERLY SEDIMENTATION POND INSPECTIONS SENECA II-W MINE
• From: PEABODY WESTERN COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

• ~,
PERIODIC INSPECTION FORM
Vater, Sediment, or Slurry InpaMnents
INSPECTOR'S NAME: Michael C. Altavilla DATE: 09/23/94
NPDES I.D. NO.: CO-0000221 D.P. 006
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: 06/07/94
SITE NAME: Pond M006 LOCATION: NV/ NV'/.. Sec. 22. TSN. R88V
MINE NAME: Seneca 11-N Mine (Peabody Loaf Co.) LOCATION: 8 mi. S of Hayden. LO
MINE I.D. NO.: LMLRD Permit No. L-82.057 OVNER'S REP.: Scott ViLliams. Swot.
Circle or write in aooraoriate response
1.
2.
3.
4.
5.
6.
Foundation preparation (removal of vegetation,
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 3.1 upstream, 3.1
•Seepage (specify location, color, and approximate
_ downstream
volume)
es No N/A
12 in. N/A
es No N/A
Yes No N/A
Total = 6.1 N/A
From underdrain pipes: Yes No
7.
8-
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19
20
At isolated points on embankment slopes: Yes N/A
At natural hillside: Yes N/A
Over widespread areas: Yes No N/A
From downstream foundati on area: Yes No N/A
"Boils" beneath stream or ponded water: Yes No N/A
Cracks or scarps on crest: Yes ~ N/A

Cracks or scarps on slope: Yes ® N/A

Sloughing or bulging on slope : Yes ~ N/A
`Major erosion problems: ~ Yes No N/A
Surface movements in valley bottom or on hillside: Yes No N/A
•E rosion of toe: Yes No N/A
'Water impounded against toe: Yes o N/A
Existing embankment freeboard: Approx. 12 feet
Increase Decrease in water lave L• No change feet
Cracks, bulging, or erosion on upstream face: Yes No N/A
Visible sumps or sinkholes in slurry surface: Yes No /A
'Clogging
Spillway channels and pipes:
Decent system:
Diversion ditches:
'Cracking or crushing of pipes
Spillway
Decant
Trash racks
pipes:
System:
clear and in place:
Stumps, topsoil:
Yes t~7O N/A
Yes No
Yes No /A
Yes ®° N
Yes No N/A
es No N/A
•Maj or adverse changes in these items could cause instability aM 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 [he space on
the back of this sheet.