HYDRO26092

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 7/15/2002
• Doc Name: 2nd Quarter 2002 Stockpond Inspections
• From: Seneca Coal Company
• To: DMG
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
Stockponda or Sumps
INSPECTOR'S NAME: Roy Karo
FACILITY CONFIGURATION: Stockpond
SITE NAME: T-20
MINE NAME: Seneca II-W
MINE I.D. NO.: C-62-057
DATE: 6/20/2002
DATE LAST INSPECTION: 3/20/2002
LOCATION: NW'-sNE'~z, Sec 15, TSN, R88W
LOCATION: 6 mi S of Hayden, CO
OWNER'S REP.: Gregg Kitchen Gen.Mgr.
Circle or write in appropriate response
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 N/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 N/A
3. Cracks or scarps on crest: Yes N/A
9. Cracks or scarps on slope: Yes N/A
5. Sloughing or bulging on slope: Yes N/A
6. *Major erosion problems: Yes N/A
7. Surface movements in valley bottom or on hillside: Yes N/A
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8. *Erosion of toe: Yes ~ N/A
9. *Water impounded against downstream toe: Yes N N/A
10. Existing embankment freeboard: Approximately 6.2 feet
11. x Increase Decrease in water level: feet
12. Cracks, bulging, or erosion on upstream face: Yes N/A
13. Splllwdy C'rOS].On: Yea ~
N N/A
19. *Clogging

Spillway channels: Yes ~ N/A
Diversion ditches: Yes 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.
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