HYDRO28809

• Permit No: C1992081
• IBM Index Class Name: Hydrology
• Doc Date: 4/6/1995
• 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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~~ PBRIODIC IN9PECTION FORM
Water, Sediment, or 91urry Impoundments
INSPECTOR'S NAME: Dennis Jonea DATE: 03/28/95
NPDES I.D. NO.: COG-850008.OOlA
FACILITY CONFIGURATION: Embankment Pond DATE LAST INSPECTION: 12/30/94
SITE NAME: Truck Loon Pond 1 LOCATION: SE'/a 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.: Scott Williams. Gen Mar
Circle or write in aoorooriate reaoonse
1. Burning (specify extent and location): Yes No /A
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 ~
I~YC~
At isolated points on embankment slopes: Yes ® N/A
At natural hillside: Yes N/A
Over widespread areas: Yes N ~ N/A
From downstream foundation area: Yes o N/A
"Boils" beneath stream or ponded water: Yes 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 Flo N/A
7. •Major erosion problems: Yes to N/A
8. Surface movements in valley bottom or on hillside: Yes N/A
9. +Erosion of toe: Yes ~
o N/A
10. •Water impounded against toe: Yes o N/A
11. Existing embankment freeboard: See comments 5 feet
12. X Increase Decrease in water level: Aonroxima tely 3 feet
13. Cracks, bulging, or erosion on upstream face: Yes
~ N/A
14. Visible sumps or sinkholes in slurry surface: Yes /A
15. *Clogginq
Spillway channels and pipes: Sees ee comae ntsn is Yes N/A
Decant system: Yes N/A
Diversion ditches: Yes No N/A
16. *Cracking or crushing of pipes
Spillway pipes: Yes ~ N/A
Decant system: Yes No N/A
17. Trash racks clear and in place: 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.