HYDRO29424

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 4/11/1997
• Doc Name: 1st Qtr 1997 Inspections
• From: SENECA COAL CO
• 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 Altavilla DATE: 03/20/97
NPDES I.D. NO.: N/A
FACILITY CONFIGURATION: Final Pit Impoundment DATE LAST INSPECTION: 12/26/96
SITE NAME: PeCoCo Reservoir LOCATION: SW~ NWy. Sec. 2. TSN, R87W
MINE NAME: Seneca II Mine (Seneca Coal Co) LOCATION: 7.1 mi. SE of Hayden, CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Brad Brown. Gen Mar
Circle or write in appropriate response
1. Foundation preparation (removal of vegetation, stumps, topsoil:
2. Lift thickness:
3. Compaction according to approved plan:
4. Burning (specify extent and location):
5. Angle of slope (degrees)
6. +Seepage (specify location, color, and approximate volume)
From underdrain pipes:
At isolated points on embankment slopes:
At natural hillside:
Over widespread areas:
From downstream foundation area:
"Boils" beneath stream or ponded water:
7. Cracks or scarps on crest:
8. Cracks or scarps on slope:
9. Sloughing or bulging on slope:
10. *Maj or erosion problems:
11. Surface movements in valley bottom or on hillside:
12. +Erosion of toe:
13. *Water impounded against toe:
14. Existing embankment freeboard: See comments
15. Increase Decrease in water level: No chance
16. Cracks, bulging, or erosion on upstream face:
17. Visible sumps or sinkholes in slurry surface:
18. *Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
19. *Crackinq or crushing of pipes
Spillway pipes:
Decant system:
20. Trash racks clear and in place:
es No
inches
Ye No
Yes No
degrees
Yes o
Yes o
Yes o
Yes
Yes o
Yes
Yes
Yes o
Yes
Yes o
Yes o
Yes o
Yes
6.0 feet
_ feet
Yes
Yes o
Yes
Yes
Yes o
Yes
Yes o
es No
+Maj or 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.