2013-02-01_HYDROLOGY - C1994082 ‎(2)‎

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 2/1/2013
• Doc Name: 4th Quarter 2012 Sedimentation Pond Inspection Report
• 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: ST -1
MINE NAME: Yoast Mine(Seneca Coal Co)
MINE I.D. NO.: C -94 -082
PERIODIC INSPECTION FORM
Stockponds or Sumps
DATE: 1 k _ (0 1 2-
Circle or write in appropriate response
DATE LAST INSPECTION: [ ^ /9- ( ?.
LOCATION: SW %, Sec 20, T5N, R87W
LOCATION: 8.5 mi. SE of Hayden, CO
OWNER'S REP.: Roy Karo, Gen Mgr
1. Angle of slope: upstream, downstream Total = 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 o 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 N. N/A
10. Existing embankment freeboard: 3.5 feet
11. vi Increase Decrease in water level: 0 5 f
12. Cracks, bulging, or erosion on upstream face: Yes �To N/A
13. Spillway erosion: Yes No N/A
14. *Clogging
Spillway channels:
Diversion ditches:
*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.
Comments: Pond 8 feet deep from spillway
Yes No N/A
Yes No N/A
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