HYDRO22517

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 1/11/1999
• 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 FORN
Water, Sediment, or Slurry Impoundments
INSPECTOR'S NAME: Michael Altavilla DATE: 12/11/98
NPDES I.D. NO.: CO-0000221 O.P_ 006
FACILITY CONFIGURATION: Croee-Valley Pond DATE LAST INSPECTION: 09/21/98
SITE NAME: Pond #006/PrP cP t1inQ Basin LOCATION: NW~r NW3~,, sec. 22 T5N ABBW
MINE NAME: s n a Ir_W M+n (senses Coal Col LOCATION: 8 mi. s of Hayden CO
MINE I.D. NO.: CMLRO Permit No. C-R2-057 OWNER'S REP.: Brad Brown, Gen Mqr
1.
2.
Foundation preparation (removal of vegetation, stumps, topsoil:
Lift thickness:
3. Compaction according to approved plan:
4. Burning (specify extent and location):
5. Angle of elope: 3:1 upstream, 3:1 downstream
6. *Seepage (specify location, color, and approximate volume)
7.
S.
9.
10
11
From underdrain pipes:
At isolated points on embankment slopes:
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 elope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
12. *Eroelon of toe:
13.
14.
15.
16.
17.
*Water impounded against toe: _
Existing embankment freeboard:
~_ increase Decrease
Approximately.
in water level:
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in Blurry surface:
18. *Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
19.
20
*Cracking or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place:
ee No
1Z in
ee No
Yee No
Total = 6:7
Yee No
Yes
Yee
Yee o
Yee o
Yee No
Yee o
Yee o
Yee o
Yee N
Yes
Yes
Yee
8.,.5- feet
0.25 feet
Yee
Yes No
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
N/A
N/A
N/A
N/A
N/A
Yee ~ N A
Yes No
Yee No N A
Yee ® N
Yes No
Yee 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 apace on
the back of this sheet.