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

INSPECTOR'S NAME: Michael
NPDES I.D. NO.: N/A
FACILITY CONFIGURATION: _
SITE NAME: Truck Wash Suo
MINE NAME: Seneca Mine II
MINE I.D. NO.: CDMG Permi
PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
Altavilla DATE: 03!20/97
Incised Pond DATE LAST INSPECTION: 12/26/96
~lv Pond LOCATION: NWy NEB. Sec. 34. T6N. R87W
(Seneca Coal Co) LOCATION: 7.1 mi. SE of Hayden. CO
t No. C-80-005 OWNER'S REP.: Brad Brown. Gen Mor
Circle or write in aonronriate reanonse
1. Foundation preparation (removal of vegetation, stumps, topsoil: ~ No N/A
2. Lift thickness: 12 inc hes
3. Compaction according to approved plan: ~ No N/A
4. Burning (specify extent and location): Yes No /A
5. Angle of slope: 2:1 upstream, 2:1 downstream Total = 4:1
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes:
At isolated points on embankment slopes: Yes
Yes No
® /
/A
At natural hillside: Yes N/A
Over widespread areas: Yes o N/A
From downstream foundation area: Yes N/A
"Boils" beneath stream or ponded water: Yes o N/A
7. Cracks or scarps on crest: Yes N/A
8. Cracks or scarps on slope: Yes ~ N/A
9. Sloughing or bulging on slope: Yes o N/A
10. *Major erosion problems: Yes o N/A
11. Surface movements in valley bottom or on hillside: Yes o N/A
12. Erosion of toe: Yes N/A
13. •Water impounded against toe: Yes o N/A
14. Existing embankment freeboard: See comments 2.75 feet
15. Increase X Decrease in water level: 0.25 feet
16. Cracks, bulging, or erosion on upstream face: Yes ® N A
17. Visible sumps or sinkholes in slurry surface: Yes No N/
18. "Clogging
Spillway channels and pipes: Yes ~o N/A
Decant system: Yes `~
Diversion ditches: Yes ~ A
19. ^Crackinq or crushing of pipes
Spillway pipes: Yes ~ N/A
Decant system: Yes No 4®
20. Trash racks clear and in place: Yes No /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.