HYDRO29315

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 7/17/1998
• 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 FORK
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Michael Altav+lla DATE: 06f29 /98
NPDES I.D. NO.: co-0000221 D.P. OOS
FACILITY CONFIGURATION: Cross_Vallev Pond DATE LAST INSPECTION: 03~17~98
SITE NAME: Pend 1005 LOCATION: NWilr cWi~ chi 0, TSN~ RBBw
MINE NAME: Seneca TI-W Mine (ceneca Coal -ol LOCATION: 8 mi. S of Hayden, CO
MINE I.D. NO.: CMT.Rn P m+ No. --8 -OS7 OWNER'S REP.: Brad Brown, Gen Mqy
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15.
16.
17.
18.
19
20
Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
Compaction according to approved plan:
Burning (specify extent and location):
Angle of elope: ~.s:~ upstream, 2.5:7 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:
Sloughing or bulging on slope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
*Eroeion of toe:
*Water impounded against toe:
Existing embankment freeboard:
Increase Decrease in water level: No change
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in Blurry surface:
*Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place:
es No
~2 in
es No
Yes No
Total = 6e1
Yee No
Yea No
Yee No
Yee No
Yes
Yea ~~~~
Yes
Yee N
Yee N®
Yee
Yee
Yee ©o
Yes
7.4 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
feet
Yes ~ N/A
Yee No N®
Yes No N A
Yee N
o

Yee ~i~
~-
ff
~1
N/A
Yes ~ N A
Yee No N A
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.