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 FORK
. Water, Sediment, or Slurry Impoundmeats
INSPECTOR'S NAME: Tom Wainwricht DATE: 09/21/93
NPDES I.D. NO.: CO-0000221 D.P. 005
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: 06/10/93
SITE NAME: Pond #`005 LOCATION: NWT SW'1r, Sec. 10. TSN. R88W
MINE NAME: Seneca II-W Mine (Peabody Coal Co.) 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 writ9 III BDprODrlBte re6pOnee
1. Foundation preparation (removal of vegetation, stumps, topsoil: ~ No N/A
2. Lift thickness: 12 in. N/A
3. Compaction according to approved plan: Q No N/A
4. Burning (specify extent and location): Yes No
5. Angle of elope: 3.4 upstream, 2.5 downstream Total = 6.1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes ~ N/A
At isolated points on embankment slopes: Yes N/A
At natural hillside: Yee N/A
Over widespread areas: Yes N/A
From downstream foundation area: Yee N/A
"Boils" beneath stream or ponded water: Yee N/A
7. Cracks or scarps on treat: Yee ~ N/A
8. Cracks or scarps on elope: ee No N/A
9. Sloughing or bulging on elope: Yes ® N/A
10. *Major erosion problems: Yee ~ N/A
11. Surface movements in valley bottom or on hillside: Yee ~ N/A
12. +Eroaion of toe: Yee ~ N/A
13. *Water impounded against toe: Yee ~ N/A
14. Existing embankment freeboard: 20.6 feet
15. Increase X Decrease in water level: See comments 1 feet
16. Cracks, bulging, or erosion on upstream face: ~ No N/A
17. Visible sumps or sinkholes in slurry surface: Yes No
18. +Clogging
Spillway channels and pipes: Yee ~ N/A
Decant system: Yee No
Diversion ditches: Yee No
19. *Cracking or crushing of pipes
Spillway pipes: Yes ~ N
Decant system: Yes No ~[.P'
20. Trash racks clear and in place: 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.