HYDRO30625

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 10/4/1993
• Doc Name: QTRLY 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 PORN
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Tom Wainwright DATE: 09/21/93
NPDES I.D. NO.: CO-0000221 D.P. 006
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: 06/10/93
SITE NAME: Pond X006 LOCATION: NW7~ NW1r, Sec. 22, TSN, R88W
MINE NAME: Seneca II-W Mine (Peabody Coal Co.1 LOCATION: 8 mi. S of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Scott Williams, Supt.
Circle or write in aooropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil: _~ No
2. Lift thickness: 12 in.
3. Compaction according to approved plan: es No
4. Burning (specify extent and location): Yea
5. Angle of elope: 3.1 upstream, 3.1 downstream Total = 6.1
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yee No
At isolated points on embankment elopes: Yee
At natural hillside: Yee
Over widespread areas: Yee
From downstream foundation area: Yee
"Boils" beneath stream or ponded water: Yee
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19
20
Cracks or ecarpe on treat:
Cracks or ecarpe on elope:
Sloughing or bulging on elope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
*Eroeion of toe:
*Water impounded against toe:
Existing embankment freeboard:
Increase X 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:
Yee
ee No
Yes
Yee
Yee No
Yee ®o
Yee
14.8 feet
4.7 feet
No
Yee No
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
N/A
N/A
N/A
N/A
~~N///A~7~
`tif.:i
Yes CLo~ N/A
Yee o ~1
Yee No I~
Yee ~ N A
Yee No
es 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.