HYDRO23207

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 10/21/1994
• Doc Name: 3rd Qtr 1994 Inspections
• From: PEABODY WESTERN
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Michael G. Altavilla DATE: 09/22/94
NPDES I.D. NO.: CO-0000221 D.P. 003
FACILITY CONFIGURATION: Diked Pond DATE LAST INSPECTION: 06/07/94
SITE NAME: Northwest Impoundment #003 LOCATION: SE~r SW's, Sec. 27, T6N, RB7W
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 YeSDODSe
1. Foundation preparation (removal of vegetation, stumps, topsoil: Yes,' No N/A
2. Lift thickness: 12 in. N/A
3. Compaction according to approved plan: Y se ) No N/A
4. Burning (specify extent and location): Yes ~ N/A
5. Angle of elope: 2:1 upstream, 3:1 downstream Total = 5:1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes No N/1Y
At isolated points on embankment slopes: Yes ~No! A
At natural hillside: Yes mid N/A
Over widespread areas: Yes ~Ia N/A
From downstream foundation area: Yes ~a~ N/A
"Boils" beneath stream or ponded water: Yes CNo; N/A
7. Cracks or scarps on crest: Yes (~o~ N/A
8. Cracks or scarps on elope: Yes ~N`o' N/A
9. Sloughing or bulging on slope: Yes ~ N/A
10. *Major erosion problems: Yes ~No, N/A
11. Surface movements in valley bottom or on hillside: Yes ~ N/A
12. *Erosion of toe: Yes QJ,o~ N/A
13. *Water impounded against toe: Yes Nod N/A
14. Existing embankment freeboard: 4.8 feet
15. Increase Decrease in water level: No chanoe ~ feet
16. Cracks, bulging, or erosion on upstream face: Yes moo, N/A
17. Visible sumps or sinkholes in slurry surface: Yes No ~Ai
18. *Clogging
Spillway channels and pipes: Yes acv N/A
Decant system: Yes No ~P.-
Diversion ditches: Yes LN~ N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yes Jo N/A
Decant system: Yes No Q3%A
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 space on
the back of this sheet.