HYDRO20882

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 1/30/1998
• Doc Name: 4th Qtr 1998 Inspections\
• From: SENECA COAL CO
• To: DMG
• Permit Index Doc Type: SEDIMENT POND INSPECTIONS
• Media Type: D
• Archive: No

PERIODIC INSPECTION FORM
water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Mi ha t At avttta DATE: 12/22/97
NPDES I.D. NO.: _0-0000 t ^.P. 00
FACILITY CONFIGURATION: Diked Pond DATE LAST INSPECTION: 09/25/97
SITE NAME: Northwe a_t 2mnoundment #003 LOCATION: SF_~ sW~, Bec. 2,Z,~, R87W
MINE NAME: s n a rr M'n (senses -oat of LOCATION: 7.1 mi. SE of Hayden, CO
MINE I.D. NO.: C 7.Rn p rmi No. -80-005 OWNER'S REP.: Brad Brown, Gen Mg,`
1. Foundation preparation (removal of vegetation, stumps, topsoil: es No N/A
2. Lift thickness: 1Z in. N/A
3. Compaction according to approved plan: e® No N/A
4. Burning (specify extent and location): Yee No
5. Angle of slope: 2:1 upstream, 3:1 downstream Total = 6:1 N/A
6. *Seepage (specify location, color, and approximate volume)
From underdrain pipes: Yee No
At isolated points on embankment slopes: Yes 0 N/A
At natural hillside: Yes ® N/A
Over widespread areas: Yes o N/A
From downstream foundation area: Yee o N/A
"Boils" beneath stream or ponded water: Yes o N/A
7. Cracks or scarps on crest: Yes No N/A
8. Cracks or scarps on slope: Yes ~ N/A
9. Sloughing or bulging on slope: Yes ® N/A
10. *Major erosion problems: Yes ® N/A
11. Surface movements in valley bottom or on hillside: Yee ® N/A
12. *Erosion of toe: Yes ® N/A
13. *Water impounded against toe: Yee ® N/A
14. Existing embankment freeboard: see comments 4.9 feet
15. Increase Decrease in water level: No chance feet
16. Cracks, bulging, or erosion on upstream face: Yee ® N/A
17. Visible sumps or sinkholes in slurry surface: Yes No
18. *Clogging
Spillway channels and pipes: Yea ®o N/A
Decant eyet em: Yee No (~A~
Diversion ditches: Yes No N A
19. *Cracking or crushing of pipes
Spillway pipes: Yes No N A
Decant system: Yes No N/
20. Trash racks clear and in place: e® 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 apace on
the back of this sheet.