HYDRO25065

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 4/8/1993
• Doc Name: 1st Qtr 1993 Inspections
• From: PEABODY WESTERN
• To: MLRD
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION PORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Tom Wainwricht DATE: 03/18/93
NPDES I.D. NO.: CO-0000221 D.P. 003
FACILITY CONFIGURATION: Diked Pond DATE LAST INSPECTION: 12/08/92
SITE NAME: Northwest Impoundment {003 LOCATION: SE1~ SWk, Sec. 27, T6N. R87W
MINE NAME: Seneca Mine (Peabody Coal Col LOCATION: 7.1 mi. SE of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-005-80 OWNER'S REP.: Scott Williams, Supt.
Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil: es No
2. Lift thickness: 12 in.
3. Compaction according to approved plan: Yea No
4. Burning (specify extent and location): Yee No
5. Angle of slope: 2:1 upstream, 3:1 downstream Total = 5:1
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes No
At isolated points on embankment elopes: Yea No
At natural hillside: Yes
Over widespread areas: Yee No
From downstream foundation area: Yes No
"Boils" beneath stream or ponded water: Yes o
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19
20
Cracks or scarps on crest:
Cracks or scarps on elope:
Sloughing or bulging on slope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
*Eroeion of toe:
*Water impounded against toe:
Existing embankment freeboard:
X 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:
Yee No
Yes No
Yea ®°
Yes ©o
Yes ©o
Yes l~o
Yee No
4.7 feet
0.1 feet
Yee
Yes No
N/A
N/A
N/A
N/A
N/A
N A
N A
N/A
N/A
N/A
N/A
/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Yee ©o N/A
Yea No
Yes N~ N/A
Yea Qo N A
Yes 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 apace on
the back of this sheet.