HYDRO20123

• Permit No: C1980005
• IBM Index Class Name: Hydrology
• Doc Date: 7/16/1997
• Doc Name: 2nd Qtr 1997 Inspections
• 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: 06/27/97
NPDES I.D. NO.: CO-0000221 D.P. 008
FACILITY CONFIGURATION: Cross-Vallev Pond DATE LAST INSPECTION: 03/17/97
SITE NAME: Pond #008 LOCATION: SW y. NWY, Sec. 7. TSN. R86W
MINE NAME: Seneca II Mine (Seneca Coal CoI LOCATION: 7.1 mi. SE of Hayden. CO
MINE I.D. NO.: CMLRD Permit No. C-80-005 OWNER'S REP.: Brad Brown. Gen Mar
1
2
3
9
5
6
7.
6.
9.
10
11
12
13
14
15
16
17
18
19
20
Circle or write in aoorooriate reaoonse
Foundation preparation (removal of vegetation, stumps, topsoil: es No N/A
Lift thickness: 12 in. N/A
Compaction according to approved plan: Yes No N/A
Burning (specify extent and location): Yes No N/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: Yes No
At isolated points on embankment slopes: Yes N/A
At natural hillside: Yes o N/A
Over widespread areas: Yes N/A
From downstream foundation area: Yes o N/A
"Boils" beneath stream or ponded water: Yes o N/A
Cracks or scarps on crest: Yes ~ N/A
Cracks or scarps on slope: Yes ~° N/A
Sloughing or bulging on slope: Yes ® N/A
*Maj or erosion problems: Yes o N/A
Surface movements in valley bottom or on hillside: Yes o N/A
*Erosion of toe: Yes o N/A
*Water impounded against toe: Yes No N/A
Existing embankment freeboard: See comments 8.0 feet
Increase Decrease in water level: No chance feet
Cracks, bulging, or erosion on upstream face: Yes
Visible sumps or sinkholes in slurry surface: Yes No N/
*Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Cracking or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place: _
Yes /1~ N A
Yes o
Yes No A
Yes ~ N[~
Yes No (~/A
es 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.