HYDRO28582

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 9/4/2001
• 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: Dennis Jones DATE: 06/19/01
NPDES I.D . NO.: CO-0000221 D.P. 006
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: 03/29/01
SITE NAME : Pond #006/Pre-Settling Basin LOCATION: NW'/a NW'/a, Sec. 22. TSN. R88W
MINE NAME : Seneca II-W Mine (Seneca Coal Co l LOCATION: 8 mi. S of Hayden. CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Greg g Kitchen Gen Mar
1
2
3
4
5
6
7
6
9
10
11
12
13
14
15
16
17
18
19
20
Circle or write in ayyrooriate reeoonae
Foundation preparation (removal of vegetation, stumps, topsoil: Yes No NfA
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 NL
At isolated points on embankment slopes: Yes N N/A
At natural hillside: Yes No N/A
Over widespread areas: Yes No N1A
From downstream foundation area: Yes No N/A
"Boils" beneath stream or ponded water: Yes No N/A
Cracks or scarps on crest: Yes No N/A
Cracks or scarps on slope: Yes No N/A
Sloughing or bulging on slope: Yes No N/A
*Maj or erosion problems: Yes No N/A
Surface movements in valley bottom or on hillside: Yes No N/A
'Erosion of toe: Yes No N/A
*Wa ter impounded against toe: Yes No N/A
Existing embankment freeboard: (normal = 8 5') 9.5 feet
Increase x Decrease in water level: 1.0 feet
Cracks, bulging, or erosion on upstream face: Yes No N/A
Visible sumps or sinkholes in slurry surface: Yes No N A
*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 No N/A
Yes o NL
Yes No N/A
Yes Flo N/A
Yes No NL
Yes 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.