2010-10-21_HYDROLOGY - C1994082

• Permit No: C1994082
• IBM Index Class Name: HYDROLOGY
• Doc Date: 10/21/2010
• Doc Name: 3rd Quarter Pond Inspection Report
• From: Seneca Coal Company
• To: DRMS
• Permit Index Doc Type: Sediment Pond Inspect
• Email Name: DTM
• Email Name: SB1
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Stockponds or Sumps
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DATE
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:
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S NAME: Denn
INSPECTOR
FACILITY CONFIGURATION: Stockpond DATE LAST INSPEC TION: .4 - 11- 10
SITE NAME: ST-1 LOCATION: SW1/, Sec 20, TSN, R87W
MINE NAME: Yoast Mine(Seneca Coal Cc) LOCATION: 8.5 mi. SE of Hayden, CO
MINE I.D. NO.: C-94-082 OWNER'S REP.: Ro y Karo, Gen Mg r
Circle or write in appropriate response
1. Angle of slope: upstream, downstream Total = N/A
2. *Seepage (specify location, color, and approximate volume)
At isolated points on embankment slopes: Yes N/A
At natural hillside: Yes F N/A
Over widespread areas: Yes No N/A
From downstream foundation area: Yes 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. 11,Erosion of toe: Yes No N/A
9. *Water impounded against downstream toe: Yes N N/A
10. Existing embankment freeboard: feet
11. Increase Decrease in water level: feet
12. Cracks, bulging, or erosion on upstream face: Yes No N/A
13. Spillway erosion: Yes No N/A
14. *Clogging
Spillway channels: Yes o N/A
Diversion ditches: Yes No 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.
Comments: Pond 8 feet deep from spillway S- kv "a