HYDRO24923

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 4/11/1997
• Doc Name: SENECA II-W MINE C-82-057 QUARTERLY STOCKPOND INSPECTIONS
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Stockponde or Sumps
INSPECTOR'S NAME: Rov Karo
FACILITY CONFIGURATION: Stockoond
SITE NAME: T-7
MINE NAME: Seneca II-W
MINE I.D. NO.: C-82-057
DATE: 03/10/97
DATE LAST INSPECTION: 12/17/96
LOCATION: SE'/.NW'/.. Sec 22, TSN. R88W
LOCATION: 8 mi 5 of Hayden, CO
OWNER'S REP.: Brad Brown, Gen Mar
Circle or write in aonrooriate response
1. Angle of slope: 5.4:1 upstream, 6.2:1 downstream Total = 11.6:1 N/A
2. *Seepage (specify location, color, and approximate volume)
At isolated points on embankment slopes: Yes o N/A
At natural hillside: Yes N/A
Over widespread areas: Yes ~ N/A
From downstream foundation area: Yes ~ N/A
"Boils" beneath stream or ponded water: Yes ~ N/A
3. Cracks or scarps on crest: Yes ~ N/A
4. Cracks or scarps on slope: Yes N/A
5. Sloughing or bulging on slope: Yes ~ N/A
6. *Maj or erosion problems: Yes ~ N/A
7. Surface movements in valley bottom or on hillside: Yes ® N/A
8. *Erosion of toe: Yes ~ N/A
9. *Water impounded against downstream toe: Yes ~ N/A
10. Existing embankment freeboard: Ao~roximately 5.6 feet
11. Increase Decrease in water level: No chanoe feet
12. Cracks, bulging, or erosion on upstream Eace: Yes ® N/A
13. Spillway erosion: Yes ~ N/A
14. *Clogginq
Spillway channels: Yes (~ N/A
Diversion ditches: Yes o ) N/A
+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.