HYDRO29584

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 6/21/1993
• 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 FORM
Water, Sediment, or Blurry Impoundments
INSPECTOR'S NAME: Tom Wainwricht DATE: 06/10/93
NPDES I.D. NO.: CO-0000221 D.P. 006
FACILITY CONFIGURATION: Croee-Valley Pond DATE LAST INSPECTION: 03/18/93
SITE NAME: Pond #006 LOCATION: NW;t NWT:. 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, Suot.
Circle or write in approxriate resvonse
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yee No N/A
2. Lift thickness: 12 in. N/A
3. Compaction according to approved plan: ~ No N/A
4. Burning (specify extent and location): Yee ~ N/A
5. Angle of elope: 3.1 upstream, 3.1 downstream Total = 6.1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yee No N/A
At isolated points on embankment elopes: Yee ~tio~ N/A
At natural hillside: Yee <
No N/A
Over widespread areas: Yee N/A
From downstream foundation area: Yee ~N~ N/A
"Boils" beneath stream or ponded water: Yee ~Q7 N/A
7. Cracks or scarps on crest: Yee No N%
8. Cracks or scarps on elope: Yee No dQ~,
9. Sloughing or bulging on elope: Yee Qln~ N/A
10. *Major erosion problems: Yee (N N/A
11. Surface movements in valley bottom or on hillside: ~ No N/A
12. *Eroeion of toe: Yee No N/A
13. *Water impounded against toe: Yee• ~Np) N/A
14. Existing embankment freeboard: 10.1 feet
15. Increase Decrease in water level: feet
16. Cracks, bulging, or erosion on upstream face: Yee ~ N/A
17. Visible sumps or sinkholes in Blurry surface: Yee No /A
18. *Clogging
Spillway channels and pipes: Yee ~ N/A
Decant eyetem: Yes No
Diversion ditches: Yee No
19. *Cracking or crushing of pipes
Spillway pipes: Yee ~ N A
Decant eyetem: Yee No ~~
20. Trash racks clear and in place: Ye 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.