2012-11-05_HYDROLOGY - C1982057

• Permit No: C1982057
• IBM Index Class Name: HYDROLOGY
• Doc Date: 11/5/2012
• Doc Name: 3rd Quarter 2012 Stockpond Inspections
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspections
• Email Name: JLE
• Email Name: SB1
• Media Type: D
• Archive: No

INSPECTOR'S NAME: Dennis Jones
FACILITY CONFIGURATION: Stockpond
SITE NAME: T -24
MINE NAME: Seneca II -W
MINE I.D. NO.: C -82 -057
Comments:
PERIODIC INSPECTION FORM
Stockponds or Sumps
Circle or write in appropriate response
DATE: Ct — L J
DATE LAST INSPECTION: 1 S "17 -0-
LOCATION: SW'%NEl %, Sec 9, T5N, R88W
LOCATION: 8 mi S of Hayden, CO
OWNER'S REP.: Dennis Jones, Manager
1. Angle of slope: 3.9:1 upstream, 4.6:1 downstream Total = 8.5:1 N/A
2. *Seepage (specify location, color, and approximate volume)
At isolated points on embankment slopes: Yes No N/A
At natural hillside: Yes No N/A
Over widespread areas: Yes No N/A
From downstream foundation area: Yes No N/A
"Boils" beneath stream or ponded water: Yes No N/A
3. Cracks or scarps on crest: Yes No N/A
4. Cracks or scarps on slope: Yes No N/A
5. Sloughing or bulging on slope: Yes No N/A
6. *Major erosion problems: Yes No N/A
7. Surface movements in valley bottom or on hillside: Yes No N/A
8. *Erosion of toe: Yes No N/A
9. *Water impounded against downstream toe: Yes 1� N/A
10. Existing embankment freeboard: R V feet
11. Increase Decrease in water level: R 1 feet
12. Cracks, bulging, or erosion on upstream face: Yes N/A
13. Spillway erosion: Yes 1 No l N/A
14. *Clogging
Spillway channels: Yes INo / N/A
Diversion ditches: Yes N 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.