HYDRO29643

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 12/11/1995
• 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: Michael Altavilla DATE: __12 /04/95
NPDES I.D. NO.: CO-0000221 D. P. 009
FACILITY CONFIGUR ATION: Coss-Valley Pond DATE LAST INSPECTION: 09/25 /95
SITE NAME: P~ld # 009 LOCATION: SEi: SWY, Sec. 11. TSN. R88W
MINE NAME: Seneca II-W Mine (Seneca Coal Col LOCATION: 8 mi. S of Hayden. CO
MINE I.D. NO.: CM LRD Permit No. C-82-057 OWNER'S REP.: Scott Williams. Gen Mor
Circle or write in anorooriate reanonse
1
2
3
4
5
6
7.
8.
9.
10
11
12
13
14
15
16
17
18
Foundation preparation (removal of vegetation, stumps, topsoil: Yes No N/A
Lift thickness: ~2 in. N/A
Compaction according to approved plan: es No N A
Burning (specify extent and location): Yes No /A
Angle of slope: 3:1 upstream, 3:1 downstream Total = 6:1 N/A
*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 slope:
Sloughing or bulging on slope:
*Maj or erosion problems: Y
Surface movements in valley bottom or on hillside:
*Erosion of toe: Y
*Water impounded against toe: Y
Existing embankment freeboard: Ao oroximately
X Increase Decrease in water level:
Cracks, bulging, or erosion on upstream face: Y
Visible sumps or sinkholes in slurry surface: Y
*Clogging
Yes
Yes No N A
N A
es o N/A
es o N/A
es o N/A
es ~ N/A
es ~ N/A
es o N/A
es o N/A
es o N/A
es o Y
Y
Y
Y
Y
Y
Y
Y
N/A
es No N/A
es N/A
10 feet
3 feet
es ISo N/A
es No /A
Spillway channels and pipes: Yes
Decant system: Yes
Diversion ditches: Yes
19. *Cracking or crushing of pipes
Spillway pipes: Yes
Decant system: Yes
20. Trash racks clear and in place: es
No
No
©°
No N/A
No N/A
No N/A
*Maj or 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.