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 Impoundmeata
INSPECTOR'S NAME: M;chae7 Altavil7a DATE: 06/29/98
NPDES I.D. NO.: CO-0000 221 D.P. 009
FACILITY CONFIGURATION: C roae-Valley Pond DATE LAST INSPECTION: 03/24/98
SITE NAME: Pond 4`009 LOCATION: SE3. SW31 Sec. 11 TSN R88W
MINE NAME: Seneca TT-W M+ ne (Seneca -oal -01 LOCATION: B mi. S of H en, CO
MINE I.D. NO.: - r.Rn p m ' No_ -8 -057 OWNER'S REP.: Rrad Brown, -Pn Mqr
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: ee No
Lift thickness: ~Z in.
Compaction according to approved plan: ~ No
Burning (specify extent and location): Yea No
Angle of elope: 3:1 upstream, 3:1 downstream Total = 6.1
*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 elope:
*Major erosion problems:
Surface movements in valley bottom or on hillside:
*Erosion of toe:
*Water impounded against toe:
Existing embankment freeboard: Annroximately
~ Increase Decrease in water level:
Cracks, bulging, or erosion on upstream face:
Visible sumps or sinkholes in slurry 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:
Yea No
Yee
Yea
Yee ®o
Yes ©o
Yes
Yes (So
Yee No
Yee
Yee o
Yes
Yee
Yee No
6.9 feet
1.o feet
Yes No
Yee 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 No N/A
Yes No
Yee No A
Yes ~ N A
Yee No
es 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.