HYDRO27591

• Permit No: C1982057
• IBM Index Class Name: Hydrology
• Doc Date: 10/29/2001
• 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: YJQtiinS J~heS DATE: q'I~-0 I
NPDES I.D. NO.: CO-0000221 D.P. 005
FACILITY CONFIGURATION: Cross-Valley Pond DATE LAST INSPECTION: 6'~cI- ~
SITE NAME: Pond H005 LOCATION: NWY. SW'/a Sec. 10. TSN. RSSW
MINE NAME: Seneca II-W Mine (Seneca Coal Col LOCATION: 8 mi. S of Hayden. CO
MINE I.D. NO.: CMLRD Permit No. C-82-057 OWNER'S REP.: Gregg Kitchen. Gen Mar
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9
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Circle or write in aoorooriate reaoonae
Foundation preparation (removal of vegetation, stumps, topsoil: Yes 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: 3.5:1 upstream, 2.5:1 downstream Total = 6:1 N/A
*Seepage (specify location, color, and approximate volume)
From underdra in pipes: No N/A
At isolated points on embankment slopes: Yes No N/A
At natural hillside: Yes No N/A
Over widespread areas: Yes No N/A
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
*Major 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
*Water impounded against toe: Yes o N/A
Existing embankment freeboard: (normal = 7.4') SPe cowweti~lS feet
Increase x Decrease in water level: " ~~ feet
Cracks, bulging, or erosion on upstream face: Yes No N/A
Visible sumps or sinkholes in slurry surface: Yes No NL
*Clogging
Spillway channels and pipes:
Decant system:
Diversion ditches:
*Crac king or crushing of pipes
Spillway pipes:
Decant system:
Trash racks clear and in place:
Yes ~ N/A
Yes o N/A
Yes No N/A
Yes N/A
Yes N/A
No N/A
No
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 space on the
back of this sheet.