HYDRO29885

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 12/6/1999
• Doc Name: QUARTERLY SEDIMENTATION POND INSPECTIONS SENECA II-W MINE
• 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: Micha 1 Al av'71a DATE: 09/23/99
NPDES I.D. NO.: CO-0000221 ^. P. OOc
FACILITY CONFIGURATION: C oee-Va 1 y Pond DATE LAST INSPECTION: 06/x,/99
SITE NAME: Pond A'005 LOCATION: NWIr SW~ ceyr. 10 TSN RBBw
MINE NAME: c n a II-W Min (c n a oal 01 LOCATION: a mi. S of Hayden. CO
MINE I.D. NO.: CMT.Rn permit No_ C-82-057 OWNER'S REP.: Rcad Arown, Can Mqr
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7.
8.
9.
10.
11.
Foundation preparation (removal of vegetation, stumps, topsoil: Yee No
Lift thickness: ~_ in
Compaction according to approved plan:
Burning (specify extent and location):
Angle of slope: 3.5:1 upstream, 2.5:1 downstream
*Seepage (specify location, color, and approximate volume)
From underdrain pipes:
At isolated points on embankment elopes:
At natural hillside:
Over widespread areas:
From downstream foundation area:
"Boils" beneath stream or ponded water:
Cracks or scarps on crest:
Cracks or scarps on elope:
_ Yea No
Yes No
Total = 6:1
Sloughing or bulging on elope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
12. *Eroaion of toe:
13. *Water impounded against toe:
14. Existing embankment freeboard:
15. ~ Increase Decrease
in water level:
16. Cracks, bulging, or erosion on upstream face:
17. Visible sumps or sinkholes in slurry surface:
18. *Clogging
Yee No
Yea
Yee
Yee 1~
Yee
Yee
Yes
Yes
Yee
Yes
Yes
Yes
Yee
8.4 feet
N/A
N/A
N/A
/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
0.5 feet
Yee ~ N/A
Yee No /A
Spillway channels and pipes: Yes /~ N A
Decant system: Yee o N
Diversion ditches: Yea ~ N/A
19. *Cracking or crushing of pipes
Spillway pipes: Yee /Io N~
Decant system: Yes o eICJ-Ipl
20. Trash racks clear and in place: Yee 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 thin sheet.