HYDRO22536

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 4/25/1994
• Doc Name: 1st 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: Dennis Jones DATE: 03/29/94
NPDES I.D. NO.: N/A
FACILITY CONFIGURATION: Final Pit Impoundment DATE LAST INSPECTION: 12/29/93
SITE NAME: PeCOCO Reservoir LOCATION: NWT, Sec. 2, T6N, R67W
MINE NAME: Seneca Mine (Peabody Coal Co.l LOCATION: 7.1 mi. SE of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Scott ;ailliams, Supt.
Circle or Write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil: _ ~Y~ No
2. Lift thickness: inches
3. Compaction according to approved plan: ~v_~ No
4. Burning (specify extent and location): Yes ~o
5. Ang 1e of slope (degrees) degrees
6. =Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes 3ie'
At isolated points on embankment slopes: Yes ddo
At natural hillside: Yes C~]~o':
Over widespread areas: Yes cllo
From downstream foundation area: Yes Qj9.~
"Boils" beneath stream or ponded water: Yes t~
7. Cracks or scarps on crest: Yes LN~o-'
8. Cracks or scarps on slope: Yes t
9. Sloughing or bulging on slope: Yes ~o~~
10. *Major erosion problems: Yes ~'
11. Surface movements in valley bottom or on hillside: Yes ~o~
12. *Erosion of toe: Yes moo'
13. *Water impounded against toe: Yes I1
14. Existing embankment freeboard: 5.5 feet
15. Increase Decrease in water level: No chan4e feet
16. Cracks, bulging, or erosion on upstream face: Yes ~2
17. Visible sumps or sinkholes in slurry surface: Yes ~N~
18. *Clogging
Spillway channels and pipes: _ Yes (~9.
Decant system: Yes
Diversion ditches: Yes
19. *Cracking or crushing of pipes
Spillway pipes: Yes ~;
Decant system: Yes Jo
20. Trash racks clear and in place: Yes ~ No
"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.