HYDRO23705

• Permit No: C1992081
• IBM Index Class Name: Hydrology
• Doc Date: 4/8/1996
• Doc Name: QUARTERLY SEDIMENTATION POND INSPECTIONS HAYDEN GULCH LOADOUT
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

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PERIODIC INSPECTION FORM
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Michael Altavilla DATE: _._03111/96
NPDES I.D. NO.: COG-850008-OOlA
FACILITY CONFIGURATION: Embankment Pond DATE LAST INSPECTION: 12/04/95
SITE NAME: Truck Loon Pond 1 LOCATION: SEY SWY.. Sec. 14. T6N. R88W
MINE NAME: H-G Terminal. Inc. LOCATION: 2 mi. SE of Hayden. CO
MINE I.D. NO.: CMLRD Permit No. C-92-081 OWNER'S REP.: Brad Brown. Gen Mar
C,Lrcle or write in aoorovriate reanonse
1. Burning (specify extent and location): Yes No
2. Angle of slope: 2.75:1 upstream, 2:1 downstream Total = 4 .75:1 N/A
3. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yes No /A
At isolated points on embankment slopes: Yes (~lo~ N A
At natural hillside: Yes o N/A
Over widespread areas: Yes o N/A
From downstream foundation area: Yes ~ N/A
"Boils" beneath stream or ponded water: Yes N N/A
4. Cracks or scarps on crest: Yes o N/A
5. Cracks or scarps on slope: Yes o N/A
6. Sloughing or bulging on slope: Yes N/A
7. *Maj or erosion problems: Yes N/A
8. Surface movements in valley bottom or on hillside: Yes No N/A
9. *Erosion of toe: Yes N/A
10. *Water impounded against toe: Yes No N/A
11. Existing embankment Freeboard: See comments 5.4 feet
12. X Increase Decrease in water level: Aooroximately 0.2 feet
13. Cracks, bulging, or erosion on upstream face: Yes ® N/A
14. Visible sumps or sinkholes in slurry surface: Yes No /A
15. *Clogging
Spillway channels and pipes: See comments Yes o N/A
Decant system: Yes N/A
Diversion ditches: Yes No N/A
16. *Crackinq or crushing of pipes
Spillway pipes: Yes No N/A
Decant system: Yes o N A
17. Trash racks clear and in place: Yes No
*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.