HYDRO25847

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 2/1/2002
• Doc Name: 4th Quarter 2000 Stockpond Inspection Reports
• From: Montgomery Watson Harza
• To: DMG
• Permit Index Doc Type: Sediment Pond Inspections
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
• Stockponds or Sumps
INSPECTOR'S NAME: Mike Altavilla DATE: 12/05/00
FACILITY CONFIGURATION: Stockpond DATE LAST INSPECTION: 09/29/00
SITE NAME: T-4 LOCATION: SW'/.NE'/.,Sec11,T5N,R87W
MINE NAME Seneca II LOCATION: 7.1 mi SE of Hayden, CO
MINE I.D. NO.: C-80-005 OWNER'S REP.: Brad Brown, Gen Mgr
Circle/Indicate or write in appropriate response
1. Angle of slope: 3:1 upstream, 2.5:1 downstream Total = 5.5:1 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 NIA
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
• S.' Erosion of toe: Yes No N/A
9.' Water impounded against downstream toe: Yes No N/A
10. Existing embankment freeboard: approximately 9.0 (feet)
11. Increase Decrease in water level; No Change (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 No 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.

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